308192A PrecisionMix Proportioning Controller · Model 224–939, Series A, Controller +5 Volts, 1.4 Amps; +12 Volts, 0.7 Amps; –12 Volts, 0.002 Amps For use only in non-hazardous

01710

Part No. 187–806 Black PendantPart No. 188–412 Red PendantThe red pendant is the same as the black pendantexcept the setup options are not accessible.

INSTRUCTIONS–PARTS LIST 308–192Rev. A

PRECISIONMIX� Proportioning ControllerFor Proportional Mixing Of Plural Component Coatings

Model 224–939, Series A, Controller+5 Volts, 1.4 Amps; +12 Volts, 0.7 Amps; –12 Volts, 0.002 Amps

For use only in non-hazardous locations. Do not oper-ate in hazardous locations, as defined in article 500 ofthe National Electrical Code (USA).

See page 3 for Table of Contents. For PrecisionMixfluid section instructions, refer to separate manual308–288. For the Solenoid Enclosure instructions, re-fer to manual 308–297.

PATENT PENDING

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441�COPYRIGHT 1993, GRACO INC.

This manual contains important warnings and information. READ AND RETAIN FOR REFERENCE

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WARNINGSSerious injury , explosion, fire or electrostatic shock can occur if the precautions below are not

followed.Read and understand all instruction manuals, tags, and warning labels before operating equipment.

Electrical equipment shall only be installed, operated, and serviced by trained, qualified personnel whoshall be fully conversant with the requirements stated within this instruction manual.

FIRE, EXPLOSION OR ELECTRIC SHOCK HAZARDGeneral SafetyTo reduce the risk of fire, explosion, or electric shock:

1. Do not operate in hazardous locations, as defined inArticle 500 of the National Electrical Code (USA).

2. Operate the PrecisionMix in well-ventilated areas only.

3. The equipment must be grounded (see below).

4. Keep liquids away from the electrical components.

5. Disconnect electrical power at the main switch beforeservicing the PrecisionMix.

6. Do not disassemble the electrical controller. Call a quali-fied electrician.

All parts of the fluid system must be properly grounded toreduce the risk of static electricity discharge. Sparks can ig-nite fumes from solvents and the fluid being sprayed, dustparticles and other flammable substances and can cause afire or explosion and serious injury and property damage.

Sparks may also occur when plugging in or unplugging apower supply cord. Do not plug in or unplug any power sup-ply cords in the spray area when there is any chance of ignit-ing fumes still in the air.

If you experience any static sparking or feel even a slightshock while using the system, stop operating the systemimmediately. Check for proper grounding of the entire system.Do not use the system again until the cause of the problem isidentified and corrected.

GroundingCheck your equipment instruction manuals and local electri-cal code for detailed grounding instructions for your area andtype of equipment, and be sure to ground all of this sprayequipment:

1. PrecisionMix System: the PrecisionMix System must beelectrically connected to a true earth ground. The groundin the electrical system is not sufficient. Ground the sys-tem as instructed on page 8.

2. Feed pumps or pressure pots: use a ground wire andclamp. See your separate pump or pressure pot manual.

3. Air compressor: follow manufacturer’s recommendations.

4 Air and Fluid Hoses: use grounded hoses only.

5 Spray Gun: obtain grounding through connection to aproperly grounded fluid hose and PrecisionMix Manifold.

6 Fluid Supply Container: according to your local code.

7. Object being sprayed: according to your local code.

8. All solvent pails used when flushing, according to yourlocal code. Use only metal pails, which are conductive,placed on a grounded surface. Do not place the pail on anonconductive surface, such as paper or cardboard,which interrupts the grounding continuity.

9. To maintain grounding continuity when flushing or reliev-ing pressure, always hold a metal part of the spray gunfirmly to the side of a grounded metal pail, then triggerthe gun.

Flushing SafetyBefore flushing, be sure the entire system and flushing pailsare properly grounded. Refer to Grounding , at left. Followthe Pressure Relief Procedure below. Always use the low-est possible fluid pressure, and maintain firm metal-to-metalcontact between the gun and the pail during flushing to re-duce the risk of injury from fluid splashing or static sparking.

Pressure Relief ProcedureTo reduce the risk of serious injury, including splashing fluid inthe eyes or on the skin, always follow this procedure when-ever you shut off the PrecisionMix, when checking or servic-ing any part of the system, when installing, cleaning, orchanging fluid tips, and whenever you stop spraying.

1. Set the PrecisionMix to STANDBY.

2. Relieve fluid and air pressure at the component and sol-vent feed pumps or pressure pots, as explained in theirseparate instruction manuals.

3. Set the PrecisionMix to MIX.

4. Hold a metal part of the spray gun firmly to the side of agrounded metal pail, and trigger the gun to relieve fluidpressure.

5. Set the PrecisionMix to STANDBY.

If you suspect that the fluid tip or hose is completely clogged,or that pressure has not been fully relieved after following thesteps above, very slowly loosen the hose end coupling andrelieve pressure gradually, then loosen completely. Now clearthe tip or hose.

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EQUIPMENT MISUSE HAZARDGeneral SafetyAny misuse of the spray equipment or accessories, such asoverpressurizing, modifying parts, using non-Graco replace-ment parts, using incompatible chemicals and fluids, or usingworn or damaged parts, can cause parts to rupture or causeequipment to malfunction and result in serious injury, such asfluid injection, splashing fluid in the eyes or on the skin, orfire, explosion or property damage.

Never alter or modify any part of this equipment; doing socould cause it to malfunction.

Check all spray equipment regularly and repair or replaceworn or damaged parts immediately.

Only use genuine Graco replacement parts when servicingthe PrecisionMix.

Always wear protective eyewear, gloves, clothing and respi-rator as recommended by the fluid and solvent manufacturer.

System PressureBe sure that all spray equipment and accessories are rated towithstand the maximum air and fluid working pressures of thesystem. Do not exceed the maximum working pressure ofany component or accessory used in the system.

Fluid CompatibilityBe sure that all fluids and solvents used are chemically com-patible with the wetted parts of each of your system’s compo-nents. Always read the manufacturer’s literature before usingfluid or solvent in your system.

IMPORTANTUnited States Government safety standards have been adopted under the Occupational Safety and Health Act. These standards –particularly the General Standards, Part 1910, and the Construction Standards, Part 1926 – should be consulted.

Table of ContentsWarnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How the PrecisionMix Works 4. . . . . . . . . . . . . . . . . . . . .

Typical Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operator Controls and Indicators 10. . . . . . . . . . . . . . . .

Pendant Screens 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer Run Mode Report 23. . . . . . . . . . . . . . . . . . . . . . .

Printer Setup Mode Report 24. . . . . . . . . . . . . . . . . . . . .

Software Screen Map with No Recipes 25. . . . . . . . . . .

Software Screen Map with Recipes 26. . . . . . . . . . . . . .

PrecisionMix Alarm Descriptions 27. . . . . . . . . . . . . . . .

Multiple Ratio Option (Recipes) 29. . . . . . . . . . . . . . . . .

Setting the Clock 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

New PrecisionMix Software 34. . . . . . . . . . . . . . . . . . . . .

Electrical Schematics 38. . . . . . . . . . . . . . . . . . . . . . . . . .

224–939 Controller Component Guide 40. . . . . . . . . . .

111–663 Computer Card 41. . . . . . . . . . . . . . . . . . . . . . .

111–673 I/O Board 42. . . . . . . . . . . . . . . . . . . . . . . . . . . .

224–944 Flow Meter Card 43. . . . . . . . . . . . . . . . . . . . . .

Printer Hookup 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data Back Cover. . . . . . . . . . . . . . . . . . . . . . . .

Warranty Back Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Phone Number Back Cover. . . . . . . . . . . . . . . . . .

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How the PrecisionMix W orksThe standard Graco PrecisionMix can blend most two-component epoxy or polyurethane paints. The Preci-sionMix is not for use with “quick-setting” paints (thosewith a pot life of less than 15 minutes). For informationon handling quick-setting paints or abrasive fluids, con-tact your Graco representative or Graco Technical As-sistance (see back page).

The system can be set up to mix components suppliedfrom pressure vessels, from feed pumps transferringthe materials from their original containers, or from acentral paint recirculating line.

The standard PrecisionMix is designed to operate anair spray or air-assisted airless system with a capacityof up to 2000 cc/min.

This manual describes the electronic controller mod-ule, which takes information from the fluid flow meters,installed in the fluid stream, and sends signals to con-trol valves to reliably proportion the two-componentcoatings. All ratio calculations are by volume. Otherinputs and outputs are provided to control the flushingprocess, provide alarm annunciation, and interfacewith the operator.

Operating Cycle

To begin operation, the spray gun operator enters thedesired ratio and other parameters through the pen-dant and energizes the MIX input. From that point on,normal operation of the PrecisionMix is controlled bythe operation of the spray gun.

When the gun is triggered, the two components enterthe PrecisionMix through separate paint lines andcheck valves, then are precisely monitored by flow me-ters.

When the spray gun is triggered, the two componentsare introduced into the integrator chamber one at atime. Their entry into the chamber is controlled by adispense valve for each component. The flow metersmonitor the exact quantities being dispensed, andsend electrical pulses to the controller. The controllermonitors these pulses and turns the dispense valveson or off accordingly (based on the target volumes cal-culated by the controller).

The following is a typical ratio cycle:

� First, the component A (resin) dispense valveopens, and the fluid begins to flow into the integra-tor chamber. When the correct quantity has beendispensed (based on the calculated target value),the component A dispense valve closes. See Fig 1.

� Next, the component B (catalyst) dispense valveopens. The fluid begins to flow into the integratorchamber and is lined up proportionately with thepreviously-dispensed component A sample, thenthe B dispense valve closes. See Fig 2.

� The process repeats itself as long as the spray gunis triggered. When the trigger is released, the Pre-cisionMix idles; it will continue where it left off whenthe gun is triggered again.

The components are pre-mixed in the integrator, thengiven a homogeneous blending as they pass through astatic mixer tube. Output from the mixer tube to thespray gun may be controlled by a fluid pressure regula-tor.

The two components continue to be alternately fed intothe mixing block as long as the gun is triggered. Whenthe trigger is released, the system idles. Operation canbe stopped at any time by energizing the STANDBYinput, or shutting off the main power switch.

Adaptive Overrun Correction

The actual volume of fluid dispensed each cycle canvary slightly from the calculated target. However, thecontroller monitors this variance and compensates onthe next cycle. At each cycle, the controller calculatesthe proper component A (resin) volume based on thedesired ratio, the actual previous component B (cata-lyst) volume, and the desired tolerance.

Whenever the fluid overrun is greater than the calcu-lated tolerance volume, a relevant message is dis-played on the pendant, the pendant alarm light blinks,the alarm annunciator closes, and the system stops.

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01855Fig 1

FUNCTIONAL DIAGRAM – COMPONENT A (RESIN) DISPENSE

KEYA Component A (Resin) Supply LineB Fluid Filter, 100 mesh minimumC Check ValveD Flow MeterE Component A (Resin) ValveF Air Purge ValveG Fluid Shut-off ValveH Ratio Check ValveJ Component B (Catalyst) Supply LineK Component B (Catalyst) ValveL Solvent Purge ValveM IntegratorN Static MixerP Fluid Supply to Gun

A B C D E F

G

H

JKL

M

N

P

01856Fig 2

FUNCTIONAL DIAGRAM – COMPONENT B (CA TALYST) DISPENSE

A E F JBCDKL

G

HM

N

P

KEYA Component A (Resin) Supply LineB Fluid Filter, 100 mesh minimumC Check ValveD Flow MeterE Component A (Resin) ValveF Air Purge ValveG Fluid Shut-off ValveH Ratio Check ValveJ Component B (Catalyst) Supply LineK Component B (Catalyst) ValveL Solvent Purge ValveM IntegratorN Static MixerP Fluid Supply to Gun

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Typical Installation

02089

HAZARDOUSAREA

NON–HAZARDOUSAREA

HAZARDOUSAREA

* IMPORTANT: Electrical connectionsmust comply with all national, state, andlocal codes.

*S

*T

*Z*W

A

X X AL

*Y

AP

AA*

AB*AD

B

LF

B

C

U P

V

R

Q

ANANANAE AF AM

X ADX ADX AD

AH*

C

D

N

M

D

AC*

*AG

AK

AJ

Fig 3

KEYA Air Supply LineB Fluid Filter (100 mesh minimum) and fluid

component inlet to PrecisionMixC Check ValveD Flow MeterE Component A (Resin) ValveF Air Purge ValveJ Component B (Catalyst) Supply LineK Component B (Catalyst) ValveL Solvent Purge ValveM IntegratorN Static MixerP Fluid Supply Line to GunQ Component A (Resin) Supply Line

R Air HoseS Main Power SwitchT 115V 60 Hz Electrical SupplyU Fluid Pressure Regulator & GaugeV Spray GunW PendantX Bleed-Type Air Valve (required)Y Ground Wire & Clamp 222–011

(Required)Z PrecisionMix Controller

(in NEMA enclosure)AA Prewired CableAB Operator Switch

AC Solenoid EnclosureAD Air Regulator & GaugeAE Supply Tank, Component A (Resin)AF Supply Tank, Component B (Catalyst)AG Meter CableAH Earth GroundAJ Solenoid Air LinesAK Air Flow SwitchAL Air Line Filter (10 micron or better)AM Supply Tank, SolventAN Fluid Shut-off ValveAP Air Solenoid ValvesAQ Solvent Supply Line

J

AQ

E K

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InstallationNOTES:

� Reference numbers and letters in parentheses inthe text refer to the callouts in the figures and theparts drawings.

� Be sure all accessories are adequately sized andpressure-rated to meet the system’s requirements.

� Connect the fluid and air supply lines as instructedin the PrecisionMix Manifold manual 308–288 andthe Solenoid Enclosure manual 308–297.

WARNINGInstalling and servicing this equipment requires ac-cess to parts which may cause electric shock orother serious bodily injury if the work is not per-formed properly. Do not install or service thisequipment or perform any of the following installa-tion and adjustment procedures unless you aretrained and qualified.

WARNINGTo prevent hazardous concentrations of toxic orflammable vapors, spray only in a properly venti-lated area. Never operate the spray gun unlessventilation fans are operating.

Check and follow all national, state, and localcodes regarding air exhaust velocity requirements.

The Typical Installation shown in Fig 3 is only a guide-line for selecting and installing system componentsand accessories, and is not an actual system design.Follow the Installation Schematic provided by Graco orcontact your Graco representative or Graco TechnicalAssistance (see back page) for assistance.

The following instructions generally presume a stan-dard system using pressure tanks to supply the paintcomponents and solvent. See Optional System Ar -rangements below for possible variations and theireffect on the instructions.

Location

WARNINGThe standard PrecisionMix is for use only in non-hazardous locations. Do not operate in hazardouslocations, as defined in Article 500 of the NationalElectrical Code (USA).

NOTE: Special systems are available for use in haz-ardous locations. Contact your Graco representative.

OPTIONAL SYSTEM ARRANGEMENTS

OPTION “A” ––Feeding Through Circulating LinesIf there is a central paint recirculating line in yourshop, the PrecisionMix can be connected to itinstead of to pressure supply tanks. Other than ref-erences to the pressure tanks, operation is thesame as described in this manual.

The fluid supply must be free of pressure spikes(normally caused by pump stroke changeover). Ifnecessary, install pressure regulators or a surgetank on the fluid inlets to the PrecisionMix, to reducethe feed pressure. Contact Graco for information onfluid pressure regulators.

For maintenance and safety, you must install a ballvalve between each supply line and the Precision-Mix.

OPTION “B” ––Feeding Through Pail or Drum Pumps

Instead of pressure supply tanks, the PrecisionMixcan be fed by pail or drum pumps. Operation is thesame, other than references to the pressure supplytanks.

The fluid supply must be free of pressure spikes(normally caused by pump stroke changeover). Ifnecessary, install pressure regulators or a surgetank on the fluid inlets to the PrecisionMix, to reducepulsation and pressure. Contact Graco for informa-tion on fluid pressure regulators.

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InstallationConnect the Electrical Supply

WARNINGTo reduce the risk of fire, explosion, or electricshock, electrical connections must comply with allapplicable national, state, and local electricalcodes.

Connect the PrecisionMix Controller to a +5 volt, 2amp; +12 volt, 0.5 amp; –12 volt, 0.5 amp groundedelectrical supply.

Follow the Installation Schematic provided by Graco.

CAUTIONIf power and grounding connections are not proper-ly made, the equipment will be damaged and thewarranty will be voided.

Ground the PrecisionMix System (See Fig 5)

WARNINGTo reduce the risk of fire, explosion, or electricshock:

� The PrecisionMix system must be electricallyconnected to a true earth ground; the ground inthe electrical system is not sufficient.

� All wires used for grounding must be 10 gaugeminimum.

� Refer to your local code for the requirements fora “true earth ground” in your area.

� Also read and follow the warnings on page 2.

Ground the PrecisionMix system as instructed belowand in the individual component manuals. Have a qual-ified electrician check resistance. A ground wire andclamp, part no 222–011, are available from Graco.

Controller

Connect the controller’s green wire to the NEMA en-closure’s grounding lug. Connect a ground wire fromthe enclosure to a true earth ground. The controllerenclosure and the manifold mounting surface must beconnected to the same true earth grounding point.

Solenoid Enclosure

Connect a ground wire from the solenoid enclosure’sgrounding lug to the same point as the manifoldmounting surface’s ground wire.

PrecisionMix Manifold

The mounting surface for the PrecisionMix manifoldmust be electrically connected to the same true earthground point as the controller enclosure. Differentground points may cause current to flow through themeter cables, causing incorrect signals.

Flow Meters

Meter cables must be connected as shown in Fig 4.Failure to properly connect the grounded conductorand shield may cause incorrect signals.

Fig 402533

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Pin A=Black, 24V+Pin B=Red, signal 1Pin C=Green, signal 2Pin D=White, groundPin E & F not used

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Pin A=Red, 24V+Pin B=Black, groundPin C=White, signal Green wire not used

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Pin 1=Red, 24V+Pin 2=White, signal 1Pin 3=Black, groundPin 4 , 5, & greenwire not used

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Installation

Fig 5

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Controller Enclosure

Solenoid Enclosure’s Grounding Lug

Solenoid Enclosure

Solenoid Enclosure Grounding Wire;must connect to the manifold mountingsurface at the same point as themounting surface ground wire

Flow Meter Cable; connect as shownin Fig 4

Ground Wire connection point forsolenoid enclosure’s grounding wireand manifold mounting surface’sgrounding wire

Manifold Mounting Surface GroundWire; must be connected to same trueearth ground as controller

enclosure is connected to

True Earth Ground; check your localcode for requirements

Controller Enclosure Grounding Wire;must be connected to same true earthground as manifold mounting

surface is connected to

Controller Enclosure’s Grounding Lug

Controller Grounding Wire (greenwire); connect to controller enclosure’sgrounding lug

Controller

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9

9

Connect Other Wiring

Connect the 24 VDC solenoid enclosure cable and me-ter cables to terminals inside the controller enclosureas shown on the prints provided by Graco.

Connect The Pendant

Connect the pendant cable to the 9-pin controller con-nector marked PENDANT.

NOTE: The NEMA enclosure bulkhead has a 6-pinconnector for the pendant.

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Operator Controls and IndicatorsOperator Controls

There are no operator controls on the controller itself.Two remote devices provide operator interface; theseare the Operator Switch and the Pendant.

Operator Switch (See Fig 6)

There are three operator input settings: MIXSTANDBYPURGE

Setting: STANDBY MIX PURGE

Use: To start orstop system

To start nor-mal opera-tion (mixingand dis-pensing)

To operateair & sol-vent purgevalves

Function: Idles system Cycles thefluid system

Cycles be-tween twosolenoidoutputs*

* This cycling can be either a function of time or ofvolume.

NOTE: Moving the Operator Switch from PURGE toMIX clears most alarms.

Typical Operator Switch

STANDBY

MIX PURGE

Fig 6

Pendant (See Fig 7)

Pendant DisplayWhen first powered up, the screen on the pendant dis-plays the calculated target volumes to achieve the de-sired ratio, and how much fluid has been dispensed inthis cycle for each component. As fluid is dispensed,the display will change to reflect the amount remainingbefore a cycle change.

On the bottom line of the display are the labels for thefour softkeys, F1 through F4. Example: If you are atthe Title screen, shown below, RUN is F1, SETUP isF2, BAT is F3, and GTOT is F4.

GRACOPRECISION MIX�

REV. 1.12 RECIPE 00RUN SETUP BAT GTOT

Pendant IndicatorsThe pendant is a small display terminal with a 4x20character display, 5 LED indicators, and a keyboard forentering setup parameters. The left four indicatorsmatch the solenoid outputs for component A (“A”),component B (“B”), purge, (SOL) and the dump valve(DUMP). The right indicator blinks to indicate an alarmcondition.

01731

Fig 7

PendantDisplay

Indicators

Softkeys

Keyboard

TARGET ACTUAL (cc)A XX.X XX.XB XX.X XX.XNXT RPT

Press NXT

FLOW 0000 cc/MDESIRED RATIO X.XCURRENT RATIO X.XXNXT RPT

Press NXT

A=00000 ccB=00000 ccTOT VOL=00000 ccNXT RESET RPT

Press NXT

SOLVENT=00000 ccTIME TO IDLE 4 MINPOT LIFENXT RESET RPT

SYSTEM IDLEPOT LIFE REMAININGMIN

Press NXT

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Pendant ScreensNOTE: The keys indicated after the screen will move you to the next screen that is shown, unless otherwise indicated.

Run ScreensTarget/Actual

TARGET (left hand column) is the desired ratio of Component A toComponent B that the controller will maintain. The controller usesthis value to compute the target volumes for the two components. ACTUAL (right hand column) shows the quantity of Component Aand Component B as it is being dispensed.

Flow Rate/Ratio DisplayFLOW is a real time display of how much flow is going through thesystem. It updates every two seconds and is the average of the lasttwo flow rate displays. The flow rate display can be altered in the set-up program to read in ounces. See the Display Units in cc or ozscreens on page 21.DESIRED RATIO is the display of what ratio the unit is programmedto run at.CURRENT RATIO is a display of what ratio the unit actually dis-pensed on the last cycle.

Component TotalizerTotal volume of Component A (A=), Component B (B=), and Compo-nent A + B (TOT VOL=) are displayed. The totalizers are reset bypressing the RESET key or pressing the RPT key. This screen canbe altered in the setup program to read in ounces. See the DisplayUnits in cc or oz screens on page 21.

Total Solvent, Idle and Pot LifeTo use total SOLVENT, you must have a flow meter on the Precision-Mix solvent inlet. TIME TO IDLE is a 4 minute clock that counts down the time that thespray device is not in use. After 4 minutes of not triggering the spraydevice, the mix manifold closes and the screen changes to the fol-lowing System Idle screen.

When the spray device is triggered, the PrecisionMix will start againwhere it left off. POT LIFE REMAINING displays how long the mixed fluid has beensitting in the lines. If the unit is turned on and nothing has beenmixed, the pot life will not count down.

CAT TANK=0000.0 GALRES TANK=0000.0 GAL

NXT CAT RES RPT

Press CAT or RES(Press NXT to go to Alarm screen)

CAT TANK PRESETIS 0000.0NEW VALUE? XXXX.XQUIT RESET

or

RES TANK PRESETIS 0000.0NEW VALUE? XXXX.XQUIT RESET

Press QUIT

NO ALARMS

NXT RPT

Press NXT

ACTIVE RECIPE IS 00

NEW VALUE? XXNXT RPT

Press unmarked key to get back tothe Main Title screen. Press SET-UP key to access the Setupscreens.

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Pendant ScreensRun Screens (continued)

Tank VolumeThis screen can be used to display how much fluid is left in the cata-lyst feed tank (CAT TANK) and the resin feed tank (RES TANK). Bypressing the CAT or RES key you will see a screen that looks like theone of the two following screens.

Enter a value that is less than the amount of fluid that is in the tankand press the ENTER key. The screen should now display the newvalue on line 2. If you want to use the same value that was pre-viously displayed, press the RESET key. Press the QUIT key to goback to the previous Tank Volume screen. As fluid is used from thetank, the value for the catalyst and resin tank will drop. When one orboth of them reaches 0, the unit will stop and the alarm will display.

AlarmIf an alarm is activated on the PrecisionMix, this screen automaticallyappears, displaying the alarm that occurred. See the alarm descrip-tions on pages 27 and 28. This screen holds the last three alarms.The most recent alarm will appear on the bottom of the screen.NOTE: A Run Report will clear the Alarm screen.

Current RecipeThis screen only appears when the recipe portion of the program isturned on. This screen will show you the recipe the unit is currentlyrunning. For further information, see Multiple Ratio Option orRecipes on page 29.

SETUP RATIO?RECIPE 00

NO YES QUIT RPT

Press YES

RATIO A/B IS XX.X:1 BY VOLUMENEW VALUE? XX.XNO QUIT

Press NO(Press QUIT to return to

Setup Ratio Title screen)

RATIO TOLERANCEVALUE IS XXNEW VALUE? XXNO QUIT

Press NO

Press NO

A DISPENSE TIMELIMIT IS XXX SECNEW VALUE? XXXNO QUIT

B DISPENSE TIMELIMIT IS XXX SECNEW VALUE? XXXNO QUIT

Press QUIT



Press SETUP

B Dispense T ime

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Pendant ScreensSetup Screens

NOTE: Entries made in the Setup screens are buffered. When the QUIT key is pressed, returning you to the Titlescreen, the changes made in Setup are transferred to the battery-backed memory. Since the data used whileoperating is also buffered, changes made in Setup will not effect PrecisionMix operation until the operator switch ismoved to the Standby position and then back to Mix, transferring the data from the battery-backed memory to theoperating buffer.

Main Title ScreenThis screen can only be accessed by pressing the unmarked key inthe F5 location on the black pendent. This screen shows the Revi-sion No. of the software. It will also show the present Recipe No. thePrecisionMix is operating with if the recipe portion of the program isturned on. From this screen, you can go into the Run, Setup, BatchTotalizer, Grand Totalizer and Clock screens.

Setup Ratio T itle ScreenIf you want to change the program in the ratio category, press theYES key. If you do not want to change the program in the ratio cate-gory, press the NO key to move to the Setup Purge T itle screen (onpage 14). Press the QUIT key to return to the Main Title screen.NOTE: RECIPE 00 only appears when the recipe portion of the pro-gram is activated.

Program RatioWith this screen, you select the volumetric mix ratio the PrecisionMixwill operate at. The volume can be set from 0:1 to 99.9:1. The valueof Component B that you enter must be a 1. If your B value does notequal one, you must convert the ratio. Example: If a 3:2 ratio is de-sired, you would convert the ratio to 1.5:1. 1.5 parts of ComponentA would then be dispensed to every 1 part of Component B. To enter this value, press the 1, the decimal point, and the 5 on thependant keyboard. Then press the ENTER key. The new value willdisplay on the top line.

Ratio ToleranceWith this screen, you select the tolerance of the ratio entered above.If this tolerance is exceeded, the PrecisionMix will shut down. Thevalue can be set from + 0 to 25 percent. Example: If the mix ratio is 2:1 and the tolerance is 5%, when thePrecisionMix checks the ratio on each cycle, if the ratio is within 2.1:1or 1.9:1, the system will continue to operate. If the ratio is not withinthose values, the system will shut down. To enter this value, press 0,then 5 and ENTER. The new value will display on line two.

A Dispense T imeThis is a setable time limit that monitors the amount of time it takesfrom the beginning of the Component A dispense to the end. Theclock counts down when the spray device is triggered and will resetonce the dispense is completed. If the time elapses before the dis-pense is complete, the PrecisionMix will go to an alarm condition. To enter a new value, type in the number on the key pad and pressENTER. The value can be set from 0 to 999 seconds. It will displayon line 2. NOTE: This setting will not function properly if the airswitch in the solenoid enclosure is not set correctly. See manual308–297.

The B Dispense Time screen functions the same way as the A Dis-pense Time screen, except it is measuring the amount of time ittakes to dispense Component B.

SETUP PURGE?RECIPE 00

NO YES QUIT RPT

Press YES

PURGE A ON TIMECHANGE TO VOLUME?

NO YES QUIT

Press NO to keep on TIMEPress YES to change to VOLUME

FIRST PURGETIME IS XX.X SECNEW VALUE? XX.XNO QUIT

or

FIRST PURGEVOL IS XXX ccNEW VALUE? XXXNO QUIT

Press NO

PURGE ATIME IS XX.X SECNEW VALUE? XX.XNO QUIT

or

Press NO

PURGE AVOLUME IS XXX ccNEW VALUE? XXXNO QUIT

��

Pendant ScreensSetup Screens (Continued)

Setup Purge T itle ScreenIf you want to change the program in the purge category, press theYES key. If you do not want to change the program in the purge cate-gory, press the NO key to move to the Setup Alarms T itle screen(on page 16). Press the QUIT key to return to the Main Title screen.NOTE: RECIPE 00 only appears when the recipe portion of the pro-gram is activated.

Purge Component A on T ime or V olumeWith this screen, you select how the Component A portion of thepurge sequence will count down, by time or by volume. To purge byvolume, you must have a flow meter in line with the PrecisionMixComponent A purge valve.

NOTE: The following screens show what will appear if purge is setup for time, first, and then the screen that willappear if setup for volume.

First Dispense of the Purge SequenceThe purge sequence always starts on Component A. The first dis-pense of the purge sequence is a setable time/volume. You can setthe time/volume for the FIRST PURGE to be more or less than thesetting for the rest of the purge cycle. To enter a new value, key inthe number and press ENTER. The value can be set from 0 to 99.9seconds or 0 to 999 cubic centimeters. It will display on line two.

Purge Component AThe purge sequence consists of two purge valves, one for Compo-nent A and one for Component B, alternating on and off. The valueyou enter for PURGE A determines how long the Component Apurge valve is open for each dispense cycle during the purgesequence, with the exception of the first and last dispense, whichhave their own values. To enter a new value, key in the number andpress ENTER. The value can be set from 0 to 99.9 seconds or 0 to999 cubic centimeters. It will display on line two.

PURGE B ON TIMECHANGE TO VOLUME?

NO YES QUIT

Press NO to keep on TIMEPress YES to change to VOLUME

LAST PURGETIME IS XX.X SECNEW VALUE? XX.XNO QUIT

or

LAST PURGEVOL IS XXX ccNEW VALUE? XXXNO QUIT

Press NO

PURGE BTIME IS XX.X SECNEW VALUE? XX.XNO QUIT

or

Press NO

PURGE BVOLUME IS XXX ccNEW VALUE? XXXNO QUIT

PURGE SEQUENCEEQUALS XX CYCLESNEW VALUE? XXNO QUIT

Press NO(Press QUIT to return to

Setup Ratio Title screen)

��


Purge Component B on T ime or V olumeWith this screen, you select how the Component B portion of thepurge sequence will count down, by time or by volume. To purge byvolume, you must have a flow meter in line with the PrecisionMixComponent B purge valve. This screen functions the same as thePurge Component A selection screen.

Last Dispense of the Purge SequenceThe last dispense of the purge sequence is always Component B.The last dispense of the purge sequence is a setable time/volume.You can set the time/volume for the LAST PURGE to be more or lessthan the setting for the rest of the purge cycle. To enter a new value,key in the number and press ENTER. The value can be set from 0 to99.9 seconds or 0 to 999 cubic centimeters. It will display on line two.

Purge Component BThe value you enter for PURGE B determines how long the Compo-nent B purge valve is open for each dispense cycle during the purgesequence. To enter a new value, key in the number and press EN-TER. The new value will display on line two. The value can be setfrom 0 to 99.9 seconds or 0 to 999 cubic centimeters. It will displayon line two.

Number of Purge CyclesWith this screen, you select how many times the purge sequenceshifts between Component A purge and Component B purge whenthe Operator Switch is set to PURGE. The value can be set from 0 to99 cycles. NOTE: At the end of the purge cycle, the purge sequencewill immediately stop and a message requesting a change to STAND-BY will be displayed on the pendant.

SETUP ALARMS?RECIPE 00

NO YES QUIT RPT

PressYES

POT LIFE TIME LIMITIS XXX MINUTESNEW VALUE? XXXNO QUIT

Press NO

POT LIFE VOLUMEIS XXX ccNEW VALUE? XXXNO QUIT

Press NO

POT LIFE TIME LIMITSTOPS SYSTEMCHANGE?NO YES QUIT

or

POT LIFE TIME LIMITSYSTEM CONTINUESCHANGE?NO YES QUIT

Press NO

��


Setup Alarms T itle ScreenIf you want to change the program in the alarms category, press theYES key. If you do not want to change the program in the alarmscategory, press the NO key to move to the Change Installation Titlescreen (on page 19). Press the QUIT key to return to the Main Titlescreen. NOTE: RECIPE 00 only appears when the recipe portion ofthe program is activated.

Pot Life T ime LimitWith this screen, you set the maximum time allowed for mixed fluid tosit in the system before tripping a pot life alarm. Enter a time valuethat represents the fluid while it is still at its normal viscosity. To entera new value, key in a number and press ENTER. The value can beset from 0 to 999 minutes. It will display on line two. NOTE: The potlife timer is reset either by a purge, or by the passage of a specifiedamount of fluid.

Pot Life Reset V olumeWith this screen, you set the volume of fluid the PrecisionMix will mixbefore the pot life timer resets. Enter a value that represents the vol-ume of mixed fluid that is in the system. To enter a new value, key ina number and press ENTER. The value can be set from 0 to 999 cu-bic centimeters. It will display on line two.

Pot Life AlarmThese screens allow you to select to have the pot life alarm stop thesystem or allow it to continue operating. In either case, the alarmlight on the pendant blinks, the alarm annuciator output goes on, andthe relevant alarm message is displayed on the pendant. When thepot life alarm is reset by either a purge or the movement of the speci-fied amount of fluid, the alarm light will go out, the alarm output willgo off, and the display will return to the Target/Actual screen (onpage 11).

AUTO DUMP OFFCHANGE TO ON?

NO YES QUIT

or

AUTO DUMP ONCHANGE TO OFF?

NO YES QUIT

Press NO

MINIMUM FLOW LIMIT IS XXXX cc/M NEW VALUE? XXXXNO QUIT

Press NO

Press NO

MAXIMUM FLOW LIMIT IS XXXX cc/M NEW VALUE? XXXXNO QUIT

��


Automatic DumpThese screens allow you to turn the automatic dump feature on oroff. This would only apply to systems with a solenoid dump valveinstalled on the outlet of the PrecisionMix static mixer. A separateoutput is provided to actuate the dump valve. When turned on, theAUTO DUMP will automatically turn on the dump valve and turn onthe purge sequence two minutes after a pot life alarm occurs. Thisfeature would be used to protect the PrecisionMix fluid componentsfrom having mixed fluid in them older than the specified pot life.

Minimum Flow Rate LimitWith this screen, you set the minimum allowable flow rate of the Pre-cision Mix. Minimum flow rate is calculated by measuring the totaltime of a cycle. If the flow rate drops below the allowable setting, analarm will activate. If you do not want to use this feature, set the val-ue to 0000 cc/M. To enter a new value, key in a number and pressENTER. The value can be set from 0 to 9999 cubic centimeters perminute. It will display on line two.NOTE: The MINIMUM FLOW LIMIT setting uses the informationfrom the flow rate display and will not activate the alarm if the spraydevice is turned off or the flow rate drops below the setting for lessthan two flow rate checks.

Maximum Flow Rate LimitWith this screen, you set the maximum allowable flow rate of the Pre-cision Mix. Maximum flow rate is calculated by measuring the totaltime of a cycle. If the flow rate exceeds the allowable setting, analarm will activate. If you do not want to use this feature, set the val-ue to 9999 cc/M. To enter a new value, key in a number and pressENTER. The value can be set from 0 to 9999 cubic centimeters perminute. It will display on line two. (The standard PrecisionMix is ratedfor 2000 cc/minute maximum fluid flow.)NOTE: The MAXIMUM FLOW LIMIT setting uses the informationfrom the flow rate display and will not activate the alarm if the spraydevice is turned off or the flow rate exceeds the setting for less thantwo flow rate checks.

MIN–MAX FLOW LIMITSTOPS SYSTEMCHANGE?NO YES QUIT

or

MIN–MAX FLOW LIMITSYSTEM CONTINUESCHANGE?NO YES QUIT

Press NO

CAT LIMIT DISPLAYED

CHANGE?NO YES QUIT

or

CAT LIMIT NOT DISPLAYED

CHANGE?NO YES QUIT

Press NO

RES LIMIT DISPLAYED

CHANGE?NO YES QUIT

or

RES LIMIT NOT DISPLAYED

CHANGE?NO YES QUIT

Press NO

��


Minimum and Maximum Flow Rate LimitThese screens allow you to select to have the minimum or maximumflow limit alarm stop the system or allow it to continue operating. Thisalarm occurs when the flow rate exceeds the limits set by the MIN–MAX FLOW LIMIT entries. In either case, the alarm light on the pen-dant blinks, the alarm annuciator output goes on, and the relevantalarm message is displayed on the pendant. When the MIN–MAXFLOW LIMIT is reset by returning within the limits set, the alarm lightwill go out, the alarm output will go off, and the display will return tothe Target/Actual screen (on page 11).

Catalyst T ank Limit DisplayThese two screens allow you to select whether the Catalyst Tank Vol-ume feature in the run screen (refer to page 12) is turned on or off. Ifit is turned off, the catalyst tank display will not appear in the runscreens.

Resin Tank Limit DisplayThese two screens allow you to select whether the Resin Tank Vol-ume feature in the run screen (refer to page 12) is turned on or off. Ifit is turned off, the resin tank display will not appear in the runscreens.

CHANGE INSTALLATION?RECIPE 00

NO YES QUIT

Press YES

STATION NMBR IS XX

NEW VALUE? XXNO QUIT

Press NO

RECIPE SELECTEDFROM PENDENTCHANGE?NO YES QUIT RPT

or

RECIPE SELECTEDFROM I/OCHANGE?NO YES QUIT RPT

Press NO

��


Change Installation T itle ScreenIf you want to change the program in the installation category, pressthe YES key. If you do not want to change the program in the instal-lation category, press the NO key to return to the Setup Ratio Titlescreen (on page 13). Press the QUIT key to return to the Main Titlescreen. NOTE: RECIPE 00 only appears when the recipe portion ofthe program is activated.

PrecisionMix Identification NumberWith this screen, you can set a specific ID number for the Precision-Mix. The ID number you choose will print out on the run report andthe setup report. You will need to use this feature when there aremultiple PrecisionMix units connected to one printer. Station #00 isthe default. It cannot be used when multiple units are connected toone printer. When station #1 to 8 are used, a (@U10) message willappear on line one of the printed reports; this is normal. To changethe station number, key in the new value and press ENTER. The newnumber will display on line one.

Recipe Input SelectThese two screens only appear when the recipe portion of the pro-gram is turned on. They allow you to select whether different recipeswill be set by the pendent or by an outside source (I/O), such as aprogrammable logic controller or an operator switch. Whatever is se-lected will globally change for all recipes.

A FLOWMETERVALUE IS .XXXNEW VALUE? .XXXNO TEST QUIT

Press NO to go to Comp. B FlowMeter Calibration Factor screen.Press TEST to go to next screen.

CAUTIONBefore pressing the TEST key , closethe fluid shut-off valve on the Compo-nent A side of the PrecisionMix man-ifold. The fluid must be shut off aspressing the TEST key will automatical-ly open the Component A (resin) valve.

RESIN FLOWMETERCALIBRATION XXXXENTER VOL XXXXQUIT

CAUTIONDo not run a second calibration testuntil you exit Setup and enter theRun mode. After you do that, you canre-enter Setup to do a second test.

��


Component A Flow Meter Calibration Factor Since flow meters come in many different sizes and styles, it is nec-essary to tell the Precision Mix Control what size the flow meters areso it can properly read the electrical pulse the flow meter sends to it.With this screen, you input the size of the Component A flow meter.The flow meter size must be entered in cubic centimeters per electri-cal pulse. You cannot enter a whole number. The number you entermust be a 3 digit decimal, but do not enter the decimal point.Example: If the electrical pulse of Flow Meter A–1 equals 0.230 cc,you would press the 2, the 3, and the 0 on the pendant keyboard.Then press ENTER. The new value will display on line two.

See manual 308–243 for the most commonly used flow meter sizes.If you do not know the size of the flow meter or do not feel the num-ber is accurate, make sure the fluid supply is shut off, then press theTEST key to go to the Flow Meter Calibration T est screen, below.

Resin Flow Meter Calibration T estNOTE: The Component A fluid shut-off valve must be closed beforeyou come to this screen. See the CAUTION, above.

This screen allows you to produce a custom calibration factor for theresin (Component A) flow meter. To find the proper calibration factor,follow this procedure:

1. Place a container under the resin ratio check valve tube.2. Open the resin ratio check valve. Make sure there is no air in the

ratio check port.3. Close the ratio check valve.4. Press the QUIT key.5. Press the TEST key.6. Weight a clean container and record the weight.7. Place the container on a scale under the ratio check valve tube.8. Open the ratio check valve. Allow an adequate quantity of a fluid,

that is of a known accurate weight per gallon, to flow into thecontainer.

9. Close the ratio check valve.10. Weight the sample and calculate how many cubic centimeters of

fluid was dispensed.

On line two of the Flow Meter Test screen there will be a number thatrepresents how much fluid the PrecisionMix determined was dis-pensed, based on the previously entered calibration factor. To enter a new calibration factor, key in how much fluid was actuallydispensed (four digit number in cc) and press ENTER. This will takeyou back to the Component A Flow Meter Calibration Factor screen,shown above. The new calibration factor will display on line two.

B FLOWMETERVALUE IS .XXXNEW VALUE? .XXXNO TEST QUIT

PURGE FLOWMETERVALUE IS .XXXNEW VALUE? .XXXNO TEST QUIT

CAT FLOWMETERCALIBRATION XXXXENTER VOL XXXXQUIT

Press TEST

SOLVENT FLOWMETERCALIBRATION XXXXENTER VOL XXXXQUIT

Press TEST

DISPLAY UNITS ccCHANGE TO oz?

NO YES QUIT

or

DISPLAY UNITS ccCHANGE TO oz?

NO YES QUIT

DISPLAY UNITS ozCHANGE TO cc?

NO YES QUIT

Press QUIT until you are at theMain Title screen. Then press BATto go to Batch Totalizer screens.

��


Component B Flow Meter Calibration FactorThe Component B Flow Meter Calibration Factor screens and theSolvent Flow Meter Calibration Factor screens function the sameas the Component A Flow Meter Calibration Factor screen onpage 20. To set the calibration factor, follow the instructions there.

CAUTIONBefore pressing the TEST key , close the PrecisionMix fluid shut-off valve that will close the fluid path for the flow meter you aretesting. The fluid must be shut off as pressing the TEST key willautomatically open the flow meter valve that you are testing.

Purge/Solvent Flow Meter Calibration Factor

NOTE: After completing the Flow Meter Tests, flush the ratio check valve and open the fluid shut-off valve before operating the PrecisionMix again.

Display Units in cc or ozThese two screens allow you to select whether the Run Screen,Totalizers, Run Screen Flow Rate, Target/Actual, Purge by VolumeInputs, Pot Life Reset Volume Input, Minimum Flow Rate Input andMaximum Flow Rate Input displays in cubic centimeters units orounces units.

TOTAL A=0000.0 GALTOTAL B=0000.0 GALTOT PAINT=0000.00 GALNXT RESET RPT

Press NXT

TOTAL SOL=0000.0 GALTOT DMP A+B=0000.0 G

NXT RESET RPT

Press NXTPress GTOT at Main Title screen to

go to Grand Totalizer screens

GTOTAL A=00000 GALGTOTAL B=00000 GALGTOT SOL=000000 GALNXT RPT

Press NXT

TOT PAINT=00000 GALTOT DUMP=00000 GAL

QUIT RPT

Press QUIT to go to Main Title screen

��

Pendant ScreensBatch Totalizer Screens

The Batch Totalizers are resettable. They keep a running total in gallons of the fluid dispensed until they are manu-ally set back to zero by pressing the RESET key.

Batch T otalizer ComponentThis screen displays the batch total volume of Component A (TOTALA), Component B (TOTAL B), and Component A + B (TOT PAINT).Press the RESET key to set the totalizers back to zero.

Batch Total Solvent and Total Component DumpTo use the solvent totalizer (TOTAL SOL), you must have a flowmeter on the PrecisionMix solvent inlet. The solvent totalizer willtotalize all the fluid that passes through the solvent flow meter in thedump mode. To use the dump totalizer (TOT DMP A+B), input #14on the I/O board must be turned on. The dump totalizer will totalizeall the fluid that passes through the resin and catalyst flow meters inthe dump mode. Press the RESET key to set the totalizers back tozero.

Grand Totalizer Screens

The Grand Totalizers are not resettable. They keep a running total in gallons of all the fluid dispensed by thesystem.

Grand Totalizer ComponentThis screen displays the grand total volume of Component A(GTOTAL A), Component B (GTOTAL B), and Solvent (GTOT SOL).To use the solvent grand totalizer (GTOT SOL), you must have aflow meter on the PrecisionMix solvent inlet.

Grand Total Paint and Total Component DumpTo use the paint (TOT PAINT) or dump (TOT DUMP) grand totaliz-ers, input #14 on the I/O board must be turned on. The paint totalizerwill totalize all the fluid that passes through the resin and catalystflow meters in the paint mode. The dump totalizer will totalize all thefluid that passes through the resin and catalyst flow meters in thedump mode.

��

Printer Run Mode ReportThe Run Mode Report can be output on a printer thatis connected to the PrecisionMix. The report will list theinformation that can be accessed on the pendant Runscreens. The ratio, flow rate, total, and grand total val-ues will show what the PrecisionMix is producing at thetime the report was printed.

To print the Run Mode Report, you must be at one ofthe five run mode screens, where one of the choiceson the pendant is RPT. Press the RPT (F4) key to printout the report. The Run Mode Report can also beprinted when input #6 on the I/O board is activated.

NOTE: The PrecisionMix does not have to be in thespray mode to print the report.

Example: Setup Ratio Title Screen

Press RPT (F4)

TARGET ACTUAL (cc)A 36.0 00.0B 12.0 00.0NXT RPT

The printer will print a report that is similar to the reportat right, only it will show the values on your system.

GRACO PMIX RUN REPORT–STATION 000/00/0000:00

TARGET VOLUME A (cc)=36.0TARGET VOLUME B (cc)=12.0DESIRED RATIO 3.0CURRENT RATIO=3.00AVERAGE RATIO=3.00POT LIFE REMAINING 060 MINCURRENT FLOW RATE (cc/M)=0000MAXIMUM FLOW RATE (cc/M)=0000MINIMUM FLOW RATE (cc/M)=0001JOB TOTAL A (cc)=00000JOB TOTAL B (cc)=00000JOB TOTAL SOL (cc)=00000JOB TOTAL VOLUME (cc)=00000

JOB TOTALS RESET

BATCH TOTAL A (gal)=0000.0BATCH TOTAL B (gal)=0000.0BATCH TOTAL SOL (gal)=0000.0BATCH TOTAL DUMP A+B (gal)=0000.0BATCH TOTAL PAINT (gal)=0000.0YR:MO:DA:HR:MN ALARM MESSAGESNO ALARMS

��

Printer Setup Mode ReportThe Setup Mode Report can be output on a printer thatis connected to the PrecisionMix. The report will showyou what parameters are currently setup on the Preci-sionMix.

To print the Setup Mode Report, you must be at one ofthe four main setup screens, where one of the choiceson the pendant is RPT. Press the RPT (F4) key to printout the report.

Example: Setup Ratio Title Screen


NO YES QUIT RPT

Press RPT (F4)

The printer will print a report that is similar to the reportat right, only it will show the parameters that are setupon your system.

GRACO PMIX SETUP REPORT–STATION 000/00/0000:00

DESIRED RATIO 3.0TOLERANCE=05%

FLOW METER K FACTORS (cc/pulse)A=.200B=.200SOL=.200

A PURGE ON TIMEA=00.5 SECONDSFIRST PURGE=00.5 SECONDS

B PURGE ON TIMEB=00.5 SECONDSLAST PURGE=00.5 SECONDS

# PURGE CYCLES=10

POT LIFE=060 MINUTESPOT LIFE RESET VOLUME=250cc

MINIMUM FLOW RATE=0000cc/MMAXIMUM FLOW RATE=9999cc/M

DOSE TIME A=010 SECONDSDOSE TIME B=010 SECONDS

ALARM REACTIONSPOTLIFE STOPMIN/MAX FLOW STOP

��

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PrecisionMix Alarm DescriptionsIf the machine stops from an alarm condition, thealarm light on the pendant blinks, a relevant messageis displayed on the pendant, and a contact closure ismade for an external annunciator. To correct the alarmcondition, the problem must be found and corrected.The operator can then restart the cycle at the pointwhere it stopped.

The following are alarm displays. Unless otherwiseinstructed on these pages, clear the alarm and restartthe system as follows:

1. Purge the mixed material line.

2. Turn the Operator Switch to PURGE, then to MIX.

NOTE: If the problem still exists, the PrecisionMix willagain shut down.

Ratio Low XX.XX

When this alarm displays, the PrecisionMix has dis-pensed a cycle (A + B) at a mix ratio less than the ratiotarget plus the tolerance.

Ratio High XX.XX

When this alarm displays, the PrecisionMix has dis-pensed a cycle (A + B) at a mix ratio higher than theratio target plus the tolerance.

Dose Time A

When this alarm displays, the PrecisionMix has notcompleted a dose of component A in the pre-selectedamount of time.

Dose Time B

When this alarm displays, the PrecisionMix has notcompleted a dose of component B in the pre-selectedamount of time.

Flow When Stopped A

When this alarm displays, the PrecisionMix hasallowed fluid to flow on the component A side when thesystem is in STANDBY.

Flow When Stopped B

When this alarm displays, the PrecisionMix hasallowed fluid to flow on the component B side when thesystem is in STANDBY.

Overdose A

When this alarm displays, the PrecisionMix has contin-ued dispensing fluid on the component A side after thevalve has shifted to the component B side.

Overdose B

When this alarm displays, the PrecisionMix has contin-ued dispensing fluid on the component B side after thevalve has shifted to the component A side.

Flow Too Low

When this alarm displays, the PrecisionMix is dispens-ing a lower fluid flow rate than pre-selected in the set-up screens.

Flow Too High

When this alarm displays, the PrecisionMix is dispens-ing a higher fluid flow rate than pre-selected in the set-up screens.

Pot Life Exceeded

When this alarm displays, the PrecisionMix has notdispensed enough mixed material of a pre-selectedquantity in the pre-selected amount of time.

To remove this alarm:

1. Purge the mixed material line.

2. Turn the Operator Switch to PURGE, then to MIX,and dispense the pre-selected quantity of material.

��

PrecisionMix Alarm DescriptionsCat Tank Empty

When this alarm displays, the PrecisionMix has dis-pensed the amount of Component B that was enteredinto the Catalyst Tank Volume screen.


1. Turn the Operator Switch to STANDBY.

2. Press NXT key until you are at the Tank Volumescreen.


NXT CAT RES RPT

3. Press CAT key.

CAT TANK PRESETIS 0000.0NEW VALUE? XXXX.XQUIT RESET

4. Enter a new value or press RESET to reset to theold value.

5. Turn the Operator Switch to MIX.

Res Tank Empty

When this alarm displays, the PrecisionMix has dis-pensed the amount of Component A that was enteredinto the Resin Tank Volume screen.


1. Turn the Operator Switch to STANDBY.

2. Press NXT key until you are at the Tank Volumescreen.


NXT CAT RES RPT

3. Press RES key.

RES TANK PRESETIS 0000.0NEW VALUE? XXXX.XQUIT RESET

4. Enter a new value or press RESET to reset to theold value.

5. Turn the Operator Switch to MIX.

Memory Failure

When this alarm displays, the software in the Preci-sionMix memory does not match the software installedin the PrecisionMix unit.


Re-initiate the PrecisionMix software. See page 34.

Parameters Not SetGo to Setup

When this alarm displays you have selected a recipethat has not been setup for ratio and flow meter cal-ibration factors. See pages 29 to 32 for more informa-tion on recipes.


1. Press the blank key (black pendent only).

2. Go to the Setup screen for the recipe you want touse.

3. Enter the values for ratio and flow meters.

You will now be able to use that recipe.

��

Multiple Ratio Option (Recipes)The PrecisionMix Controller is able to store 16 differentratio programs or Recipes. There are 4 inputs on theI/O board for ratio program selection. By electricallyselecting 1 of the 16 different combinations of 4 to theinputs, there will be an entirely new ratio program touse.

You can select these different recipes on an outsidesource either manually, using the PrecisionMix pen-dant or automatically, using an electrical switch to theI/O board.

Initiating the Recipes

To use the Multiple Ratio Option, you must initiate therecipes in the software, as follows:

WARNINGTo reduce the risk of electric shock, the power tothe PrecisionMix Controller must be off before youbegin to initiate the multiple ratio option. The Con-troller shall only be serviced by trained, qualifiedpersonnel.

1. Turn off power to the PrecisionMix Controller.

2. Locate the I/O board on the PrecisionMix Control-ler. See page 40.

3. Locate the inputs for PrecisionMix paint start (input#7) and purge start (input #8). See page 42.

4. Locate the inputs for the ratio selections (inputs#10, #11, #12 and #13).

5. Connect a jumper wire from terminal #1 to #15,then to #17, to #21, to #23, to #25, and to #27 onthe I/O board. This will turn on the paint, the purge,and all the ratio inputs at the same time when thePrecisionMix is turned on.

6. Turn on the power to the PrecisionMix Controller.The #7, #8, #10, #11, #12 and #13 input lightsshould be lit. The display on the pendant should beblank.

7. Turn the power off to the PrecisionMix Controller.

8. Remove the jumper wires installed in step 5.

9. Turn on the power to the PrecisionMix Controller.Press the blank key in the upper right corner of thependant.

The Main Title screen will change. It should look likethis:



The word RECIPE and a two digit number have beenadded on line three. The recipe is the ratio programselection you are making. You are able to select fromamong 16 different recipes (00 to 15).

NOTE: If the screen does not look like this, repeatsteps 1 to 9.

��

Multiple Ratio Option (Recipes)Selecting Pendent or I/O Recipe Control

Go to the SETUP RATIO screen on the pendant. Referto the Screen Map with Recipes on page 26.


NO YES QUIT RPT

1. Press the NO key until you reach the ChangeInstallation screen.

CHANGE INSTALLATION?RECIPE 00

NO YES QUIT

2. Press YES.

STATION NMBR IS XX

NEW VALUE? XXNO QUIT

3. Press NO.

RECIPE SELECTEDFROM PENDENTCHANGE?NO YES QUIT RPT

4. If the screen is set as shown in the previousscreen, recipes can only be selected with the pen-dent. If you want to select recipes with the I/Oboard, press YES. The screen will change to thefollowing:

RECIPE SELECTEDFROM I/OCHANGE?NO YES QUIT RPT

Selecting a Recipe with the Pendent

To change the recipe manually with the pendant, youmust enter the 2 digit number of the recipe you wish toprogram.

Example:



Press 0 and 5 keys.The screen will change to the following:



NOTE: You must enter 2 digits to change the recipe.

��

Multiple Ratio Option (Recipes)Selecting a Recipe with the I/O

To change the recipe automatically with the I/O board,you must turn on the paint start signal (input #7) eachtime you want the recipe to change while electricallyturning on the ratio input combination you wish tochange to. See the list below for the available I/Oboard input combinations for recipe selection.

I/O Input Combinations for Recipe Selection

INPUT RECIPE

No inputs 00

#10 01

#11 02

#10, 11 03

#12 04

#10, 12 05

#11, 12 06

#10, 11, 12 07

#13 08

#10, 13 09

#11, 13 10

#10, 11, 13 11

#12, 13 12

#10, 12, 13 13

#11, 12, 13 14

#10, 11, 12, 13 15

To select a recipe with the I/O board, electricallychoose one of the 16 input combinations, shown in thelist at left, and electrically start the PrecisionMix.

Example:

1. Display the Recipe screen.

ACTIVE RECIPE IS 05

NEW VALUE?NXT RPT

2. Turn on input #10 and 11 to select recipe 03. Thescreen will change to the following:

ACTIVE RECIPE IS 05

NEW VALUE? 03NXT RPT

3. Then turn on input #7 (paint start signal). The fol-lowing screen will appear:

ACTIVE RECIPE IS 03

NEW VALUE?NXT RPT

4. Setup each of these recipes as you would a nor-mal program. See the Setup screens, starting onpage 13. Remember that each recipe has a wholenew set of parameters. If you change a parameterfrom the default parameter on one recipe andwould like the same parameter on another recipe,you must setup the new information in that recipe.

If you select a recipe where the ratio and flowmeter calibration factors have not been setup inthe program, the pendent will beep and the screenwill change to the following:

PARAMETERS NOT SETGO TO SETUP

��

Multiple Ratio Option (Recipes)Run Screen – Current Recipe

There is a Run screen on the pendant that shows therecipe the PrecisionMix is operating with. This screencan be used to display the current recipe whether therecipe is selected from the pendant or the I/O board.

1. To access this screen, select RUN on the pendantMain Title screen. The following screen will ap-pear:

TARGET ACTUAL (cc)A XX.X XX.XB XX.X XX.XNXT RPT

2. Press NXT until the following screen appears.

ACTIVE RECIPE IS 05


3. To change the recipe, type in the 2 digit number forthe new recipe you want.

If the PrecisionMix is in the standby position when youtype in a new 2 digit number, it will automaticallychange to the new recipe.

If the PrecisionMix is in the mix mode when you type ina new number, it will not change the recipe but will dis-play the new number on line 2 as shown in the nextscreen:

ACTIVE RECIPE IS 05NEXT RECIPE IS 10NEW VALUE? XXNXT RPT

When the operator switches from MIX to STANDBY,the next recipe will become the active recipe:

ACTIVE RECIPE IS 10


��

Setting the ClockThe PrecisionMix Controller has an internal clockwhich allows the operator to display the year, month,day, hour, and minute of each report and each alarm.Once set, the clock will continue to run whether thePrecisionMix controller is on or off.

To set the clock:

1. Press the blank key in the upper right corner of thependant once, to get to the Main Title screen.


REV. 1.12RUN SETUP BAT GTOT

2. Press the blank key once again to get into theclock setup mode.

PRECISION MIX�REV. 1.12

RUN SETUP BAT GTOTYEAR=00

3. Enter a 2 digit value (year) and the pendant willautomatically scroll to the next screen.

REV. 1.12RUN SETUP BAT GTOTYEAR=93MONTH=00

4. Enter a 2 digit value (month) and the pendant willautomatically scroll to the next screen.

RUN SETUP BAT GTOTYEAR=93MONTH=08DATE=00

5. Enter a 2 digit value (date) and the pendant willautomatically scroll to the next screen.

YEAR=93MONTH=08DATE=24HOUR (0–24)=00

6. Enter a 2 digit value in military time and the pen-dant will automatically scroll to the next screen.

MONTH=08DATE=24HOUR (0–24)=15MINUTE=00

7. Enter a 2 digit value (minutes) and the pendant willautomatically scroll to the next screen.

MINUTE=36 8/24/9315:36 ENTER

TO CONTINUE

8. Press ENTER and the screen will return to theMain Title screen.

��

New PrecisionMix Software

To reduce the risk of electric shock, the power tothe PrecisionMix Controller must be off before youbegin to change the software. The Controller shallonly be serviced by trained, qualified personnel.

WARNING

NOTE: If you change the PrecisonMix software, youmust initiate the new program. Initiating the softwareremoves the old program and loads the new program.

Installing the New Software

1. Turn off the power to the PrecisionMix Controller.

1. Locate the computer card on the PrecisionMixController. See page 40.

2. Locate the software chip on the computer card.See Fig 8. Note the direction of the chip and whichside of the chip the blank spaces are on.

Fig 8

SoftwareChip

3. Use an I.C. extraction tool to remove the old soft-ware chip. Pull the chip directly up. See Fig 9.

Fig 9

ExtractionTool

To remove the software chip without an extractiontool, carefully pry the chip out evenly on bothsides. See Fig 10.

Fig 10

4. Install the new software chip with the last row ofpins in the last row of holes. Make sure the chip isfacing the correct direction, all the pins are in theholes, and the blank spaces are on the correctside of the chip. See Fig 11.

Fig 11

Notedirection

of chip

Make sure allthe pins are inthe holes

Initiating the New Software

1. Locate the I/O board on the PrecisionMix Control-ler. See page 40.

2. Locate the inputs for PrecisionMix paint start (input#7) and purge start (input #8). See page 42.

3. Connect a jumper wire from terminal #1 to #15,then to #17 on the I/O board. This will turn on thepaint and the purge at the same time when thePrecisionMix is turned on.

4. Turn on the power to the PrecisionMix Controller.The paint (#7) and purge (#8) input lights shouldbe lit. The display on the pendant should be blank.

5. Turn the power off to the PrecisionMix Controller.

6. Remove the jumper wires installed in step 3.

The program on the new chip has now been initiated.

NOTE: When the software is changed, the setup pa-rameters will change to the default. Go through theentire program and set the proper parameters.

��

OperationThe following instructions generally presume a stan-dard system using pressure supply tanks for the paintcomponents and solvent, and air spray guns. Also seeOptional System Arrangements on page 7 for pos-sible variations and their effect on the instructions.

Flushing The Mixing System

Flush the mixing system with solvent and air at the endof each workday or before any break longer than thepot life of the fluid. Use the following flushing proce-dure:

WARNINGFor your safety, read the warning section FlushingSafety on page 3 before flushing, and follow all therecommendations given there. ALWAYS wear pro-tective eyewear when flushing.

1. Open the fluid pressure regulator.

2. Turn the Operator Switch to STANDBY. Refer toFig 6, page 10.

3. During the following procedure (steps 4 to 7), fol-low the instructions given in your separate gunmanual for safely grounding your gun while flush-ing.

4. Pull the trigger to hold the spray gun open. If thegun is air-operated, open it manually (trigger only).

NOTE: Solvent flushes the right-hand (catalyst) side ofthe mixing block, and the inner tube of the integrator.Air flushes the left-hand (resin) side of the mixingblock, and the outer tube of the integrator. Dependingon the components being used, you may flush withsolvent, air, or both – modify the following procedureaccordingly.

5. Turn the Operator Switch to PURGE. The purgesequence will automatically cycle. See page 14 forsetup of purge sequence.

6. Should the system require further purging, turn theOperator Switch to STANDBY and back to PURGEfor another sequence.

7. Set the Operator Switch back to STANDBY to stopthe purge sequence.

8. Adjust the fluid pressure regulator back to the nor-mal working pressure.

Emergency Flush Procedure

If the electrical power is interrupted, the system can bepurged by using the following procedure:

1. Open the gun trigger.

2. Press the manual override button (H) on the sol-vent solenoid valve, which is inside the Precision-Mix solenoid enclosure. Refer to Fig 12.

3. Hold the button in until the system is thoroughlyflushed.

Fig 12 ��

H

Starting Production

NOTE: When you first start up the system after it hasbeen shut down for a period of time, it will cycle rapidlyuntil system pressure is built back up. This is normaland there is no cause for alarm.

1. Check that paint and solvent supply tanks arefilled.

2. Check that fluid valves are turned on and the fluidpressure to the PrecisionMix is properly set.

3. Check that the air pressure to the PrecisionMix isproperly set; most applications require about 80psi (6 bar); 60 psi (4.2 bar) is the minimum setting.

4. Check that the PrecisionMix fluid shut-off knobs,dispense valve knobs, and purge valve knobs areall opened.

5. Turn ON the main power switch, push the NXT keyon the pendant and check if the desired ratio iscorrect.

6. Cycle through the other pendant screens andcheck that the totalizer and target volumes are sat-isfactory.

��

Operation7. Remove any air from the fluid lines of the system:

a. Shut off the air to the gun by closing the airregulator on the PrecisionMix.

b. Hold a metal part of the spray gun firmly to theside of a grounded metal pail and pull the trig-ger.

c. Set the Operator Switch to MIX.

d. If the flow meters overrun because of air in thesystem, operation will stop. Repeatedly setthe Operator Switch to STANDBY, then backto MIX until paint flows air-free from the spraygun.

8. If the paint output is too low, increase the air pres-sure on both supply tanks; if too high, reduce theair pressure, close the dispense valves further, oradjust the fluid pressure regulator.

CAUTIONDo not use the first 4 to 5 oz. (120 to 150 ml) ofpaint from the system, as it may not be thorough-ly mixed.

9. Check the air pressure regulators on the supplytanks, to be sure that the feed pressures areapproximately the same.

10. Check or reset the air regulator in the spray airline.

11. Check or reset the (optional) fluid pressure regula-tor on the static mixer outlet. Use the adjustmentkey to adjust the regulator.

12. Begin production by setting the Operator Switch toMIX.

13. Operation of the PrecisionMix is controlled by theoperation of the spray gun. When the gun is trig-gered, the dispense valves open and allow the Aand B components to enter the mix manifold andbe mixed and dispensed to the gun.

WARNINGTo reduce the risk of serious injury, including fluidinjection or splashing fluid in the eyes or on skin,always follow the Pressure Relief Procedure onpage 2 and disconnect all power to the Precision-Mix before checking or servicing any part of thesystem, before installing, cleaning, or changingfluid tips, and whenever you stop spraying.

Monitoring the Fluid Supply

The PrecisionMix controller is equipped with softwareto monitor the amount of fluid used and shut down thesystem and provide an alarm when a limit is reached.See the Tank Volume screen on page 12 to set theselimits.

NOTES:

� If required, switch on the supply tank agitators brief-ly whenever the fluid needs stirring.

� Periodically check the fluid level in the paint andsolvent supply tanks, and refill as necessary.

CAUTIONNever allow the paint supply tanks to empty com-pletely while the PrecisionMix is operating. Fillthem periodically, as needed. Failure to do so maycause the metering ratios to be incorrect.

Stopping Production

Stop operation at any time by switching to STANDBY.If your stop time will not exceed the pot life of Compo-nent A or B, no additional action is needed, except torelieve pressure at the spray gun. If your stop time willexceed the pot life, you must flush the mixing system.See Flushing the Mixing System , page 35.

��

OperationColor Change

Follow this procedure before using the PrecisionMixsystem for the first time and before changing the colorof the paint.

NOTE: For other color change options, contact yourGraco representative.

1. Turn OFF the main power switch.

2. Bleed off all fluid pressure on both dispensevalves.

3. Disconnect the base supply and catalyst supply,and connect a regulated solvent line in bothplaces.

4. Turn ON the main power switch and turn theOperator Switch to MIX.

5. At the spray gun, purge the fluid into a groundedwaste container until the solvent comes out clear.

6. Turn OFF the main power switch and switch toSTANDBY.

7. Bleed off all fluid pressure on the solvent. Discon-nect the solvent supply from the filter inlets, andconnect the new color in its place, then reconnectthe catalyst supply line.

8. Using the procedure for Setting Parameters , atright, change the ratio and other parameters to thenew values.

9. Turn ON the main power switch and switch to MIX.

10. Begin production.

Setting Parameters

NOTE: See page 25 for a map of Setup screens.

To set parameters you must have a black pendant,which has the unmarked key to the right of F4 enabled.Pushing this key displays the revision screen with thechoices: RUN, SETUP, BAT and GTOT.

Pushing the SETUP key displays the first of severalscreens for setting up or changing parameters.

Setup pendant screens are described on pages 11 to22.

Maintenance

The PrecisionMix Controller requires no regular main-tenance. However, it is a good practice to check withGraco periodically to see if hardware or softwareupdates are available.

��

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01857

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224–939 Controller Component Guide

01710

Flow MeterCard

(See page 43)

ComputerCard

(See page 41)

PrinterSocket

(See page 44)

I/O Board(See page 42)

TB1

FlowmeterSocket

PendantSocket

I/O BoardTerminalStrip(See page 42)

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111–663 Computer Card

01712

Row 1,Pin 5

Row 2,Pin 5

Row 1,Pin 1

Row 2,Pin 1

FLOW METER CARD PLUG (FRONT VIEW) PENDANT PLUG (FRONT VIEW)Row 1,

Pin 7

Row 2,Pin 7

Row 1,Pin 1

Row 2,Pin 1

I/O Cable Socket

PendantInterfaceSocket

Flow Meter CardInterface

Socket

PrinterInterface

Socket

3.6 Volt Battery(Part No. 111–664)

Program ResetButton

PrecisionMixSoftware Chip

Clock Chip

Power InletConnector

Pin 55

Pin 56

Pin 3Pin 1

Pin 2 Pin 4

Back View Of Power Inlet Connector

Flow Meter Plug Pin Assignments

Row 2, Pin 1: TB2, Pin 3 (Yellow)

Row 2, Pin 2: TB2, Pin 2 (Orange)

Row 2, Pin 5: TB2, Pin 5 (Gray)

Pendant Plug Pin Assignments

Row 1, Pin 6: Pend.3 (Purple)

Row 1, Pin 5: Pend.2 (Blue)

Row 1, Pin 1: Pend.5 (Black)

Row 2, Pin 2: TB2, Pin 4 (Red)

Power Inlet ConnectorPin Assignments

Pin 2: +5 Volts

Pin 4: Common

Pin 55: +12 Volts

Pin 56: –12 Volts

Software ChipBlank Spaces

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111–673 I/O Board

01713

RED

RED

RED

RED

RED

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

BLACK

5 Amp Fuse(1 Per Relay Slot)

0–Catalyst Valve Output

1–Resin Valve Output

2–Solvent Comp. B Output

3–Solvent Comp. A Output

4–Dump Valve Output

5–All Alarms Output

6–Air Flow Switch Input

7–Mix Paint Start Input

8–Mix Purge Start Input

9–Remote Printout Input

10–Select Ratio Input Opt




14–Color Change cc Input

15–Potlife Alarm Output

WHITE

Output Relay(Part No. 111–675)

5 Volt +

Computer Interface Socket

5 Volt Com.

Input Relay(Part No. 111–674)

Relay ActivationIndicator Lights

(0–15)

OutputRelay(Part No.111–675)

5 Volt +

5 Volt

Com.

Input Relay(Part No. 111–674)

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(0–15)TerminalStrip

110 Volt Relay(Part No. 513–955)

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

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224–944 Flow Meter Card

01714

1

2

3

4

5

6

7

40

39

38

37

36

35

34

33

5 Volt+ In (Red)

Resin Signal Out (Yellow)

Catalyst Signal Out (Orange)

5 Volt Com. In (Black)

Solvent Signal Out (Gray)

Communication Port (Red)

TB1 (Not Used)

Resin Input Signal

Resin Input SignalResin Meter Signal Com.

Catalyst Input Signal

Catalyst Input Signal

Catalyst Meter Signal Com.

#4 Meter Signal Com.

#4 Meter Signal #1#4 Meter Signal #2

Solvent Meter Signal Com.

Solvent Input Signal #2

Solvent Input Signal #1

Flow Meter Card Power Inlet and Flow Meter Signal Outlet T erminals (TB2 Connector)

Flow Meter Card DiagnosticsNOTE: Check for a 5VDC+ pulse signal at these points.

Resin #1

Resin #2

Catalyst #1

Catalyst #2

Solvent #1

Solvent #2

CatalystOutputCombined

ResinOutputCombined

SolventOutputCombined

Fiber Optic or Electric Meter Select Jumpers

Electric Meter

Fiber Optic Meter

Jumpers 1 and 2 – Resin MeterJumpers 3 and 4 – Catalyst MeterJumpers 5 and 6 – Solvent MeterJumpers 7 and 8 – #4 Meter

Sockets 1 and 2 – Resin MeterSockets 3 and 4 – Catalyst MeterSockets 5 and 6 – Solvent MeterSockets 7 and 8 – #4 Meter

1 2 3 4 5 6 7 8

Fiber Optic Cable Inlet Sockets

Flow Meter Signal Input T erminals (TB3 Connector)

1 2 3 4 5 6 7 8

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Printer Hookup

252423222120191817161514

01715

White #12

Black #13

Blue #14

5 4 3 2 1

6789

13 12 11 10 9 8 7 6 5 4 13 2

25 24 23 22 21 20 19 18 17 16 15 14

131211109876541 32 541 32

9876

WhiteBlack

Red

Brown (Not Used)

#12 White

#14 Blue

#13 Black

Computer Card

Printer Plug

Black–Ground

Brown–Transmit

Green–Receive(Not Required)

Printer Cable Receptacle(Front View)

876541 32 6541 32

Graco Part No. 514–036 Printer Dip Switch Settings

Printer Serial Port

25 Pin D–Sub Male Pin Connector(Jumper 6 to 20)

9 Pin D–Sub Male Pin Connector

Printer Cable

ON

OFF

Printer Cable: Graco Part No. 948–954

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Notes

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The Graco Warranty and DisclaimersWARRANTYGraco warrants all equipment manufactured by it and bearing its name to be free from defects in material and workman-ship on the date of sale by an authorized Graco distributor to the original purchaser for use. As purchaser’s sole remedyfor breach of this warranty, Graco will, for a period of twelve months or two thousand hours of operation from time of sale,repair or replace any part of the equipment proven defective. This warranty applies only when the equipment is installed,operated and maintained in accordance with Graco’s written recommendations.

This warranty does not cover, and Graco shall not be liable for, any malfunction, damage or wear caused by faulty instal-lation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, orsubstitution of non–Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by theincompatibility with Graco equipment of structures, accessories, equipment or materials not supplied by Graco, or theimproper design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materi-als not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Gracodistributor for verification of the claim. If the claimed defect is verified, Graco will repair or replace free of charge anydefective parts. The equipment will be returned to the original purchaser transportation prepaid. If inspection of theequipment does not disclose any defect in material or workmanship, repairs will be made at a reasonable charge, whichcharges may include the costs of parts, labor and transportation.

DISCLAIMERS AND LIMIT ATIONSThe terms of this warranty constitute purchaser’s sole and exclusive remedy and are in lieu of any other warranties (express or im-plied), including warranty of merchantability or warranty of fitness for a particular purpose, and of any non–contractual liabili-ties, including product liabilities, based on negligence or strict liability. Every form of liability for direct, special or consequential dam-ages or loss is expressly excluded and denied. in no case shall Graco’s liability exceed the amount of the purchase price. Any action forbreach of warranty must be brought within two (2) years of the date of sale.

EQUIPMENT NOT COVERED BY GRACO WARRANTYGraco makes no warranty, and disclaims all implied warranties of merchantability and fitness for a particular purpose, with re-spect to accessories, equipment, materials, or components sold but not manufactured by Graco. These items sold, but not manu-factured by Graco (such as electric motor, switches, hose, etc.) are subject to the warranty, if any, of their manufacturer.Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.

Technical DataElectrical supply +5 Volts, 1.4 Amps; +12 Volts, 0.7 Amps; –12 Volts, 0.002 Amps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical consumption 16 watts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Phone NumberTo place a PrecisionMix equipment order, contact your Graco distributor or call Graco, Chicago.

For PrecisionMix technical assistance, call Graco, Chicago.Phone No. 708–678–7200

Sales Offices: Atlanta, Chicago, Dallas, Detroit, Los Angeles, Mt. Arlington (N.J.)Foreign Offices: Canada; England; Switzerland; France; Germany; Hong Kong; Japan; Korea

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441PRINTED IN U.S.A. 308–192 10/93

Documents

308192A PrecisionMix Proportioning Controller · Model 224–939, Series A, Controller +5 Volts, 1.4 Amps; +12 Volts, 0.7 Amps; –12 Volts, 0.002 Amps For use only in non-hazardous