for the MODEL DMOM-200 · EXPENDABLES.....Paper, thermally sensitive, 2.5-inch wide roll (VIC part # TP-3) WARRANTY.....One-year warranty on parts and labor; post warranty service

OPERATING PROCEDURESfor the

MODEL DMOM-20010-200 Amperes True DCDigital Micro-Ohm Meter

Part Number VIC-9000-100

Vanguard Instrument Company1710 Grevillea CourtOntario, California 91761

TEL: 909/923-9390 AUGUST 2001FAX: 909/923-9391 REV. 0

Operating Procedures DMOM-200™

ii

SAFETY SUMMARY

The following safety precautions must beobserved during all phases of test set-up, testhookups, testing, and test-lead disconnects.

Do Not Service or Test AloneDo not perform test procedures or serviceunless another person is also present who iscapable of rendering aid and resuscitation.

Avoid Contact with High VoltageBecause electrical utility stationenvironments contain high voltages andcurrents, there is always the possibility ofpersonal contact with an unexpected lethalvoltage generated by magnetic inductionand/or electrostatic leakage from nearby livecircuitry. When test units are connected todeenergized (“dead”) power lines, regardlessof how short they are, always discharge thelines before attaching any test lead. Becauseof the possibly deadly consequences ofphysical contact with such high-voltage lines,engineers and technicians must always treatelectrical equipment and hookups as though alethal condition will eventually occur.Therefore, no matter how unlikely it mayseem, never assume anything about the safetyof any test setup.

Ensure the safety of personnel by checkingfirst-hand to eliminate all possible hazards!

Do Not Test Inductive Winding ResistanceBecause the DMOM-200 produces testcurrents up to 100 amperes, it is able to buildup large magnetic fields in iron-coretransformers. The interruption of such testcurrents can produce a high voltage spikethat can cause severe injury, death, and/orequipment damage. Therefore, do notattempt to measure the resistance of iron-coretransformer windings (use equipmentdesigned specifically for that purpose).

Do Not Modify Test EquipmentBecause of the added risk of introducingadditional or unknown hazards, do not installsubstitute parts or perform any unauthorizedmodification to the DMOM-200. Toensure that designed safety features aremaintained, it is recommended that allDMOM-200 repairs be done at VanguardInstruments Company or by an authorizedrepair-service. Unauthorized DMOM-200modifications can create unknown safetyhazards and will void the warranty.

Follow Exact Operating ProceduresAny deviation from the operating proceduresdescribed in this manual may create one ormore safety hazards, damage the DMOM-200 or cause test errors; VanguardInstruments Co. assumes no liability forunsafe or improper use of the DMOM-200.


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TABLE OF CONTENTSSafety Summary1.0 INTRODUCTION .................................................................................................................. 1

1.1 Applicability ....................................................................................................................... 11.2 Supersedure Notice ............................................................................................................. 11.3 General Description ............................................................................................................ 11.4 Functional Description........................................................................................................ 11.5 Furnished Test Accessories ................................................................................................ 1

2.0 DMOM-200 Specifications ................................................................................................. 23.0 CONTROLS AND INDICATORS......................................................................................... 34.0 PRETEST SETUP .................................................................................................................. 5

4.1 Operating Voltages ............................................................................................................. 54.2 DMOM-200 Printer Paper............................................................................................... 64.3 DMOM-200 Cable Connections ..................................................................................... 6

5.0 OPERATING PROCEDURES............................................................................................... 75.1 Operating Overview............................................................................................................ 75.2 Preparation .......................................................................................................................... 75.3 Keying-in Data Characters.................................................................................................. 75.4 Run Test Procedure........................................................................................................... 105.5 Enter ID Procedure ........................................................................................................... 135.6 Review Record Procedure ................................................................................................ 155.7 Restore Record Procedure ................................................................................................ 175.8 Print Test Record Directory Procedure............................................................................. 195.9 Test Record Procedure...................................................................................................... 205.10 Computer Interface Procedure ...................................................................................... 215.11 Set Clock Procedures .................................................................................................... 215.12 Calibration Check ......................................................................................................... 22

Appendix A DMOM-200 Troubleshooting GuideAppendix B DMOM-200Cable Accessories


iii

LIST OF TABLESTable 1.0 DMOM-200 Specifications and Leading Particulars .................................................. 2Table 2.0 DMOM-200 Controls and Indicators .......................................................................... 4Table 3.0 Voltage Selection............................................................................................................ 5Table 4.0 Run Test Procedure (Measure an Unknown Resistance).............................................. 10Table 5.0 Run Setup Procedure (test-record, site, and equipment identification) ........................ 13Table 6.0 Review Record Procedure ............................................................................................ 15Table 7.0 Restore Record Procedures ........................................................................................... 17Table 8.0 Print Test Record Directory.......................................................................................... 19Table 9.0 Erase Test Record Procedure........................................................................................ 20Table 10.0 Computer Interface Procedures ................................................................................ 21Table 11.0 Set Clock Procedures ................................................................................................ 21Table 12.0 Calibration Check Procedure .................................................................................... 22

LIST OF FIGURESFigure 1.0 DMOM-200 Control Panel (Controls and Indicators) ............................................ 3Figure 2.0 90 to 130Vac Jumper Setting...................................................................................... 5Figure 3.0 210 to 240Vac Jumper Setting.................................................................................... 5Figure 4.0 DMOM-200 Cable Connection............................................................................... 6Figure 5.0 Step-by-Step Procedures for DMOM-200 Operations............................................ 8Figure 6.0 Typical DMOM-200 Tabulated Report Printout................................................... 12Figure 7.0 Typical Directory Printout ........................................................................................ 19Figure 8.0 Bus Bar Connection .................................................................................................. 23


1

1.0 INTRODUCTION1.1 ApplicabilityThis manual applies to the Model DMOM-200™, part number VIC-9000-100, which ismade by Vanguard Instruments Company.

1.2 Supersedure NoticeThis manual is the basic issue for the ModelDMOM-200 and does not supersede anypublished document.

1.3 General DescriptionThe DMOM-200™ is a Digital Micro-OhmMeter for precisely measuring non-inductiveresistances from 1 micro-ohm to 300 milli-ohms. Applications include resistancemeasurement of circuit-breaker contacts,bushing joints, or any other low resistance.It is field-portable, rugged, and easilyoperated by first-time users having littletraining (its microprocessor-driven, whichautomates many functions). It has a 16-keypushbutton pad for entering test parametersand control functions, and a 4-line by 20-character LCD readout for displayingcontrol-option menus, measured resistancevalues, and related identifying data. TheDMOM-200 has a built-in thermal printer,which prints test data on 2.5-inch-widethermally sensitive paper.Operation requires little more thanconnecting the test leads to an unknownresistance and selecting the test parameters;It requires no calculation of lead-loss, hand-written notes, or the memorizing of detailedroutines. Operators select the test current(10 to 200 amperes) and test time (5 to 60seconds). Measured resistance data isdisplayed and can be printed on the thermalprinter. The measured resistance data canalso be stored (up to 63 records of 96readings each) in FLASH EEPROMmemory; Operators can recall the storedresistance-measurements and related data ata later time for review and printing.

1.4 Functional DescriptionDMOM-200 operation is based on theelectrical relationships described by Ohm’slaw: R=V/I, where I is a known test currentand V is the voltage across the unknownresistance (e.g., breaker contacts). Since thetest current through the unknown resistanceis known and voltage across it is read by themicroprocessor, the resistance is calculatedusing Ohm’s law.The DMOM-200 test voltage is suppliedby a filtered direct-current power supply. Aprecisely regulated constant-current sourcecontrols the current ramps up/down time andthe test current. The dc test current (10 to200 amps) slowly ramps up/down, whichvirtually eliminates magnetically inducedtransients; thus, the risk of inductivelytripping a circuit-breaker’s bus differentialrelay is virtually non-existent.DMOM-200 voltmeter test leads are runseparately from the current-bearing testleads to the resistive load; thus, voltages aremeasured at the terminals of the resistancebeing measured, eliminating error from theI•R voltage drop in the test current cables.The DMOM-200 makes precise micro-ohm measurements possible withoutcalculating compensation for test-current-lead resistance errors.

1.5 Furnished Test Accessories The DMOM-200 is supplied with a powercord, a roll of 2.5-inch-wide printer paper,and one 35-foot test cable set with quick-disconnect plugs to the unit and heavy-dutyalligator clamps to the load. Heavy-dutywelding-type C-clamps (see Appendix B)are also available as optional accessories (C-clamps allow test- lead connection to a widevariety of bushing sizes, bus bars, and manyother junctions that require low-contactresistance).


2

2.0 DMOM-200 SPECIFICATIONS

Table 1.0 DMOM-200 Specifications and Leading Particulars

MODEL .............................................DMOM-200 (part number VIC-9000-100)

TYPE..……… ..................................Special-purpose test equipment, portable; 100-ampere,Digital Micro-Ohm Meter

POWER ............................................85 to 132 V ac or 200-240 V ac (selectable), 50/60 Hz

SIZE (inches) ....................................16.8 wide by 12.6 high by 10.6 deep

WEIGHT............................................Less than 21 lbs

TEST CURRENT ..............................10 to 200 amperes

RESISTANCE READING RANGE ...1 micro-ohm to 300 milliohms

ACCURACY .....................................±1% reading, ± 1 count

DISPLAY ..........................................LCD, 4-line by 20-character, back lighted

CONTROLS......................................Keypad: 10 number keys and 6 function keys

COMPUTER INTERFACE................RS-232C

PRINTER ..........................................Thermal printer (prints on 2.5-inch-wide thermal paper)

ENVIRONMENT ...............................Operating: 0°C to 55°C; Storage: -40°C to 65°C

FURNISHED .....................................One power cord, one 35-foot test cable set, One cable bag

EXPENDABLES ...............................Paper, thermally sensitive, 2.5-inch wide roll(VIC part # TP-3)

WARRANTY .....................................One-year warranty on parts and labor; post warrantyservice contracts available

NOTE: �THE ABOVE SPECIFICATIONS ARE VALID AT NOMINAL OPERATING VOLTAGE AND AT A TEMPERATURE OF 25°C(77°F)�DMOM-200 SPECIFICATIONS MAY BE UPGRADED AND CHANGED WITHOUT PRIOR NOTICE.


3

3.0 CONTROLS AND INDICATORS(See Figure 1.0 and refer to Table 2.0).

The DMOM-200 controls and indicatorsare shown in a panel illustration (see Figure1.0). Pointing leader lines reference eachitem in the figure with an index number.Each index number is cross-referenced to afunctional description in Table 2.0, whichdescribes the purpose of each item on the

control panel. Although the purpose ofthese controls and the display may seemobvious, users should become familiar withthem before attempting to use the DMOM-200. However, accidental misuse of thecontrols will usually cause no serious loss ofdata or equipment damage. First-time usersshould review and become familiar with theSafety Summary located in the front sectionof this manual.

Figure 1.0 DMOM-200 Control Panel (Controls and Indicators)


4

Table 2.0 DMOM-200 Controls and IndicatorsFig. 1Index PANEL MARKING FUNCTIONAL DESCRIPTION

1 ON/OFF Input power connector with third-wire safetyground and 10A built-in circuit breaker.

2 RS-232C Connector, 9-pin; Serial interface-port connector(female DB type) to allow the DMOM-200 tobe controlled by an IBM-compatible PC.

PIN SIGNAL 2 Tx

3 Rx 5 Signal Gnd

3 (no marking) Display, back-lighted liquid crystal (LCD); 4-lineby 20-character; sunlight readable; displays testmenus (operator options), status, and test results(See Figure 2 for operating displays of controlsteps in logical flow sequence).

4 (no marking) Built-in thermal printer; prints test result data on2.5-inch-wide thermal paper.

5 (no overall marking; keys are individually marked—see

Figure 1)

Operating key-pad controls; 10 alpha-numerickeys and 6 function keys (i.e., START, STOP,CLEAR, ENTER, & CONTRAST/PAPERpositioning ∧ & ∨).

6 HIGH CURRENTPRESENT

Warning indicator; red LED; Lights when highcurrent is running through the test leads.

7 (no marking) Voltage-sensing test-lead plug-in sockets (2), red;reads voltage at test load.

8 (no marking) Test-current lead plug-in sockets (2), red;conducts up to 100 amperes through unknownresistances.

3.1 DMOM-200 LCD ContrastControlTo Darken the LCD display, press and holdthe “Paper ∧ Contrast” switch for twoseconds; to lighten the LCD display, pressand hold the “Paper ∨ Contrast” switch fortwo seconds.

3.2 DMOM-200 Printer ControlTo advance printer paper, press “Paper ∧Contrast” switch once. Paper will advancefrom printer. Press “Paper ∨ Contrast”switch once, paper will advance backwardfrom printer.

3.3 RS-232C Computer-Interface portAn IBM PC software package is suppliedwith each DMOM-200 allows the user toretrieve test records stored in the DMOM-200 memory.


5

PRETEST SETUP4.1 Operating VoltagesThe DMOM-200 operating voltages areselectable between 90-130Vac, 50/60Hz or210-240, 50/60Hz. Voltage selection is set

by the placement of jumpers on the powerterminal block as listed in Table 3.0 belowand Figures 2.0 and 3.0.

Table 3.0 Voltage SelectionVOLTAGE SELECTION TERMINAL BLOCK JUMPERS

90-130Vac Brown to blue & yellow to green210-240Vac Blue to yellow

Figure 2.0 90 to 130Vac Jumper Setting

Figure 3.0 210 to 240Vac Jumper Setting

220Vac Jumper Installation

120Vac Jumper Installation


6

4.2 DMOM-200 Printer PaperThe DMOM-200 printer uses 2.5-inchwide thermal paper for printing test results.We recommend that to maintain the highestquality printing and to avoid paper jamming,use paper supplied by our factory. Papercan be ordered from two sources, as follows:

Vanguard Instruments Co, Inc.1710 Grevillea CourtOntario, CA 91761Tel: 909-923-9390Fax: 909-923-9391

Part Number: TP-3 Paper

ORBG Instrument Co.Route 1, Box 258Mead, WA 99201Tel: 509-893-9881Fax: 509-893-9803

Part Number: TP-3 paper

4.3 DMOM-200 Cable ConnectionsThe DMOM-200 is supplied with a 35-foot test cable set. Each cable consists of acurrent-carrying cable and a voltage-sensingcable. The current-carrying cable isterminated with a 100-ampere male plug.The sensing cable is terminated with a 25-ampere female plug. Insert the current-cableplugs and voltage-sensing plugs into theirrespective control-panel jacks (see Figure4.0 below). Ensure that voltage plugs(smaller) are inserted into jacks adjacent totheir companion current jacks (larger).

Figure 4.0 DMOM-200 Cable Connection


7

4.0 OPERATING PROCEDURES(Refer to Tables 4.0 through 12.0)5.1 Operating Overview(See Figure 5.0, for step-by-step flow.)Procedures for operating the DMOM-200are presented in tabular format, with adifferent table for each of the main menus(START and SETUP) procedures. Eachprocedural step is indexed by number andindicates an operator action, followed by adescription of the result or what should beobserved to confirm the action (setting thestage for the next step). All operations aredescribed in step-by-step sequences andbegin with the start menu (shown below):

START MENU1. RUN TEST 06/11/012. SETUP 12:23:013. CAL CHECK

Item 1 on this menu (RUN TEST) is theprocedure for measuring an unknownresistance. Item 2 (SETUP) is for recordidentification in the DMOM-200. Item 2(SETUP) expands into a menu of supportfunctions. Item 3 (CAL CHECK) is aperformance-verification procedure forchecking key circuit functions (refer to table11). All operator procedures begin with theSTART MENU and may continue on theSETUP MENU, with each step-by-stepprocedure presented in tabular form.

SETUP MENU1. ENTER ID2. REVIEW RECORD3. RESTORE RECORD4. NEXT PAGE

The SETUP MENU lists 4 user options:Item 1 (ENTER ID) is used to specifyidentification record data (please observeinstructions in note 2 on Figure 5.0, Step-by-Step Procedures for DMOM-200

Operations). Item 2 (REVIEW RECORD)is used to review store records. Item 3(RESTORE RECORD) is used to erase orrestore test records or to print a directory oftest records in stored memory. Item 4(NEXT PAGE) is used to put the DMOM-200 under PC control or to set the timeand date clock.

5.2 PreparationPlug unit power plug into power serviceoutlet. Set unit main power switch to ONposition. Plug test-lead cable plugs into redjacks on control panel (ensure current andvoltage-sensing cables are plugged intocompanion jacks). Connect current andvoltage-sensing test lead clamps to oppositeterminals of resistance to be measured.

5.3 Keying-in Data CharactersUnless otherwise prompted by the display,keyed-in data is loaded by pressing theENTER key (which also changes the displayto go to the next screen). When using thealpha/numeric keys (like telephone dial-inpushbuttons; see item 5 of Figure 1.0) tospecify data characters: Press the key onceto set the number marked on the key. Pressthe key a second time to set the first lettermarked on the key. Press the key a thirdtime to select the second letter marked onthe key. Press the key a fourth time to selectthe third letter marked on the key.Additional key presses will repeat theselection cycle (e.g., 2, A, B, C, 2 . . .).When the character of choice is selected,press the ∧ key to advance to next characterspace; press the ∨ key to back-space. PressCLEAR to delete a selected character(cursor must be on character to be deleted).Again, press the “ENTER” key to load allcharacter selections.


8

.

Figure 5.0 Step-by-Step Procedures for DMOM-200 Operations


9


10

5.4 Run Test ProcedureThe following procedure describes the stepsto measure an unknown resistance.

NOTEThe red HIGH CURRENT PRESENT

indicator will begin flashing when the testcurrent are applied to resistance load.

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)STEP ACTION DMOM-200 DISPLAY

4-1 Begin RUN TEST procedure: Press key no.1 on START MENU. “SELECT TESTCURRENT” menu appears.

4-2 Select test current: Press key for desired testcurrent. If a test current is other than listedin items 1 thru 4, then press key # 5 for user-defined (CUSTOM) test current and go tostep 4-2a. If menu items 1 thru 4 werepressed, then SELECT BURN-IN TIMEmenu appears. Go to step 4-3.

NOTESelect 5-second burn-in time in thisexample.

4-2a Custom select burn-in current level entry bypressing numeric keys, then press ENTERand go to step 4-3.

NOTEFor this example, we used 100A test current.

4-3 Select burn-in time by pressing the key (1 -6) that corresponds to desired burn-in time(see display on step 4-2). Display ofselected test current and burn-in timeappears.

4-4 Press START key to run resistancemeasurement test. Display of rampingcurrent and percent of ramp level displayswith the notice TEST IN PROGRESS.When test current has ramped up to thespecified level (current is at 100%), the testresult display appears automatically.

4-5 Automatic; no operator action required.Current, burn-in time, and resistancemeasurement changes on the display duringburn-in. At the end of burn-in time, finalresistance measurement displays.

SELECT TEST CURRENT:1. 10A 2. 25A3. 50A 4. 100A5. CUSTOM

SELEC E:1. 5 SE EC3. 20 S5. 60 S

ENTE

CURREBURN -

CURRERAMPIN

CURREBURN-I 500.5

T BURN-IN TIMC 2. 10 S

EC 4. 30 SECEC

R TEST CURRENT(10 to 200)100 AMPS

NT: 100 AMPS IN: 5 SEC

T
“START” TO RUN TES
NT: 100 AMPSG CURRENT 10%

TEST IN PROGRESSPLEASE WAIT

NT: 100 AMPSN: 5 SEC MICRO-OHMSPLEASE WAIT


10

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)(Continued)

STEP ACTION DMOM-200 DISPLAY4-6 Automatic; no operator action required.

At the end of burn-in time final resistancedisplays. Press the “ENTER” key to go tonext display.

4-7 Automatic: Print test result option display.

4-8 Printing option: When the “PRINT TESTRESULTS?” displays, press #1 key toprint. Typical print out is shown in Figure 6.0.If no printout is needed, then go to nextstep.

4-9 Automatic; No operator action is required.When test report completes printing,KEEP THIS READING?” displays.

4-10 “KEEP THIS READING?” If the testedresistance measurement is to be stored intest record buffer, press # 1 key (YES). Ifno record of the test is to be stored inmemory, then press # 2 key (NO).

4-11 Automatic; No operator action is required.“RUN ANOTHER TEST?” displays.

4-12 If another test needs to be run, then press#1 key (YES). Beginning test options(SELECT TEST CURRENT:) menudisplays (return to step # 4-1). If anothertest is not needed, then press #2 key (NO)and go to step 4-14.

4-13 Return to step #1 to setup for another test(repeat sequence from step 4-1 to step 4-11.

Step 4-1 thru 4-11 displays repeat.

FINAL RESISTANCE I= 100 AMPS 500.5 MICRO-OHMS

PRINT RESULTS?1. YES2. NO

PRINTINGPLEASE WAIT

KEEP THIS READING?1. YES2. NO

TEST SAVED

RUN ANOTHER TEST?1. YES2. NO

SELECT TEST CURRENT:1. 10A 2. 25A3. 50A 4. 100A5. CUSTOM


11

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)(Continued)

STEP ACTION DMOM-200 DISPLAY4-14 “SAVE THIS RECORD?” displays when

another test was not selected in step 4-12.Test record contains all the reading takenin this test.

4-15 To save this record, press key #1 (YES). Iftest record is not to be saved, press key #2(NO) and go to step 4-17.

NOTEA test record is saved in FlashEEPROM. A record numberwill be automatically assignedto the record by the DMOM-200. (The Test record wasassigned #2 in this example).

4-16 When record is saved (record # shows ondisplay), press ENTER to return to STARTMENU, which presents options for allstep-by-step operating procedures.

4-17 Pressing key #2 (NO) on SAVE THISTEST RECORD (see step 4-14) causes theARE YOU SURE? Prompt (shown atright).

4-18 In response to ARE YOU SURE? If key#1 is pressed, test record will be erasedfrom working buffer and display returns to“START MENU”. If key #2 is pressed,the test record will be saved in FlashEEPROM. Test record number assigned tothis record will also be displayed. Exit theRECORD SAVED display by pressingENTER, which returns display to theSTART MENU.

This ends the RUN TEST procedure.

1. RUN TEST 06/11/012. SETUP 12:24:013. CAL CHECK

1. RUN TEST2. SETUP3. CAL CHECK

ARE YOU SURE?DATA WILL BE LOST!1. DO NOT SAVE RECORD2. SAVE RECORD

RECORD NUMBER 2HAS BEEN SAVED!

SAVE THIS TEST RECORD?1. YES2. NO


12

Figure 6.0 Typical DMOM-200 Tabu
lated Report Printout


13

5.5 Enter ID ProcedureThis procedure allows the user to enter theequipment identification to the test record.

Table 5.0 Run Setup Procedure (test-record, site, and equipment identification)STEP ACTION DMOM-200 DISPLAY

5-1 Press key # 2 (SETUP MENU) on STARTMENU to go to Setup menu (shown atright).

5-2 On SETUP MENU, press #1 key (ENTERID) to begin identification entry (beginswith “COMPANY” display).Note: Other setup options go to thefollowing procedural tables:1. Review Record procedure in Table 6.02. Restore Record Procedure in Table 7.03. NEXT PAGE procedures.

5-3 Enter utility COMPANY name usingalpha/ numeric keypad. When theCOMPANY name is keyed in, pressENTER to load keyed data and go toSTATION identification display.

5-4 Enter utility STATION name using alpha/numeric keypad. When STATION nameis keyed in, press ENTER to load keyeddata and go to CIRCUIT identificationdisplay.

5-5 Enter utility CIRCUIT name using alpha/numeric keypad. When CIRCUIT name iskeyed in, press ENTER to load keyed dataand go to MANUFACTURERidentification display.

5-6 Enter tested item’s MANUFACTURERname using alpha/numeric keys. Whenthe manufacturer’s name is keyed in, pressENTER to load keyed data and go toMODEL identification display.

1. ENTER ID2. REVIEW RECORD3. RESTORE RECORD4. NEXT PAGE

COMPANY:

STATION:

CIRCUIT:

MANUFACTURER:

MODEL:


14

Table 5.0 Run Setup Procedure (test-record, site, and equipment identification)(continued)

STEP ACTION DMOM-200 DISPLAY5-7 Enter test item’s MODEL using

alpha/numeric keypad. When item’sMODEL is keyed in, press ENTER to loadkeyed data and go to SERIAL NUMBERidentification display.

5-8 Enter test item’s SERIAL NUMBER usingalpha/numeric key pad. When serial numberis keyed in, press ENTER to load keyed-indata and go to KVA RATING display.

5-9 Enter test items KVA RATING using alpha/numeric keypad. When KVA RATING iskeyed in, press ENTER to load keyed-in dataand go to OPERATOR identification display.

5-10 Enter test OPERATOR name, using alpha/numeric keypad. When OPERATOR name iskeyed in, press ENTER to load keyed-in dataand return to START MENU display.

This completes the ENTER ID procedure.

SERIAL NUMBER:

KVA RATING:

OPERATOR:

1. RUN TEST 06/11/012. SETUP 12:26:013. CAL CHECK


15

5.6 Review Record ProcedureThis procedure describes steps to review atest record residing in DMOM-200working memory. The user can view therecord on the LCD display or from a thermalprintout.

NOTETo review a test record stored in FlashEEPROM, the user must first restore testrecord from Flash EEPROM to workingmemory (see paragraph 5.7)

Table 6.0 Review RecordSTEP ACTION LAY

6-1 On START MENU, press key #2 (SETUP) toselect SETUP MENU (shown at right).

6-2 Press key#2 (REVIEW RECORD) on SETUPMENU, which displays the REVIEWRECORD menu options.

6-3 If test-result records are to be printed out onpaper, press #2 key (PRINT TEST RECORD)on the REVIEW RECORD display. Testrecords print out as the printing noticedisplays. When printout of test records iscomplete, display returns to START MENU,which ends the procedure for this branch ofthe SETUP procedure.

6-4 If records are to be viewed in sequence(scrolled), press key #1 (SCROLL TESTRECORDS) on the REVIEW RECORDdisplay. Scroll through test records (use ∧and ∨ keys to scroll). When record of interestappears, stop scrolling and press ENTER.

6-5 When the scrolled data record of interestdisplays, press ENTER key. Selected testrecord ID displays the selected test recordnumber. When it is confirmed that the correcttest record ID has been selected, pressENTER to display the number of tests in therecord, the time and date of the selected test.

ProcedureDMOM-200 DISP


REVIEW RECORD

1. SCROLL TEST RECORD2. PRINT TEST RECORD

PLEASE WAITPRINTING . . .

RECORD ID INFO:1710VICABC

2 TESTS

06/11/01 17:27:00


16

Table 6.0 Review Record Procedure (continued)STEP ACTION DMOM-200 DISPLAY

6-6 When the record number, with the time anddate of the test, displays and is noted, pressthe ENTER key: Display lists full data of thetest, including test number, test current,burn-in time, and the measured resistancevalue.

NOTEThe test record in this example contains 2tests.

6-7 Press ∧ key to advance to next test. Press ∨key to return to previous test.

6-8 Press STOP to return to START MENU.This completes the review record procedure.

Display returns to START MENU.

TEST NUMBER: 1TEST CURRENT: 100ABURN - IN TIME: 5 Sec

500.3 MICRO-OHMS

TEST NUMBER: 2TEST CURRENT: 50ABURN - IN TIME: 5 Sec

500.1 MICRO-OHMS


17

5.7 Restore Record ProcedureThis procedure describes the steps to recall atest record stored in the DMOM-200Flash memory.

Table 7.0 Restore Record ProceduresSTEP ACTION DMOM-200 DISPLAY

7-1 On START MENU, press #2 key (SETUP)to display the SETUP MENU.

7-2 On SETUP MENU, press #3 key(RESTORE RECORD) to display menu ofoptions (Restore Record, Directory, EraseRecord).

7-3 Press #1 key (RESTORE RECORD) todisplay menu of restore records options.

7-4 Press key #1 (ENTER RECORDNUMBER) to display prompt to enterrecord number to restore. Press key #2(SCROLL TO SELECT) and go to step 7-6for Records Directory display.

7-5 When record number has been keyed in,press ENTER to restore the selected record.When the display confirms that the record isrestored (brief display time) display returnsto REVIEW RECORD options menu(resume procedure at step 7-9 in Table 7.0).

7-6 In the RESTORE RECORD menu, presskey #2 to display a scrolled RecordsDirectory.

7-7 In the Records Directory, use ∧ and ∨ keysto scroll through the directory listings of testrecords. When the test record of interestdisplays, press the ENTER key to displaythe record number and the time and date ofthe selected test.


1. RESTORE RECORD2. DIRECTORY3. ERASE RECORD

RESTORE RECORD1. ENTER RECORD NUMBER2. SCROLL TO SELECT

RESTORE RECORDNUMBER:

RECORD RESTORED!

RECORDS DIRECTORY

“UP TO SCROLL FWD“DWN” TO SCROLL RVS

#1 06/11/01 17:27:00

1710VIC


18

Table 7.0 Restore Record Procedures (Continued)STEP ACTION DMOM-200 DISPLAY

7-8 Press ENTER key again to restore selectedtest record. A Record Restoredconfirmation displays, after which thedisplay returns to REVIEW RECORD(resumes by returning to step 7-9).

7-9 Test ENTER key again to displayREVIEW RECORD option.

7-10 Press key #1 to display data on LCD (seestep 6-5). Press key #2 to print test record.

This completes the Restore Record Procedure.

RECORD RESTORED!

REVIEW RECORD

1. SCROLL TEST ECORD2. PRINT TEST RECORD


19

5.8 Print Test Record Directory Procedure This procedure describes the steps to printthe test record directory that is stored in theDMOM-200 Flash EEPROM.

Table 8.0 Print Test Record DirectorySTEP ACTION DMOM-200 DISPLAY

8-1 On the RESTORE RECORD display (step 7-2), press key #2 (DIRECTORY) to go to aprint menu of print options.

8-2 PRINT DIRECTORY choice is to print eithera FULL DIRECTORY or a SHORTDIRECTORY. Regardless of which choice isselected, the PRINTING DIRECTORY noticedisplays as the selected directory prints out apaper copy. When printout is completed,display returns to the START MENU. Thisends the directory procedures.

NOTEThe Short directory printout lists thelast 10 test records stored in FlashEEPROM memory.

Figure 7.0 Typical Directory

PRINT DIRECTORY

P

1. FULL DIRECTORY2. SHORT DIRECTORY

PRINTING DIRECTORY

rintout


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5.9 Test Record ProcedureThis procedure describes the steps to deletea test record or all test records stored in theDMOM-200 Flash EEPROM.

Table 9.0 Erase Test Record Procedure STEP ACTION DMOM-200 DISPLAY

9-1 On the RESTORE RECORD display (step 7-2), press key #3 (ERASE RECORD) todisplay an ERASE RECORD menu ofoptions (shown at right).

9-2 On the ERASE RECORD menu display,press key #1 to erase a single record.

9-3 When this selection is made, the user shallenter record number then press ENTER keyto confirm. Press ENTER key again toreturn to main menu.

NOTEPress STOP key to abort.

9-4 Press key #2 to erase all records. PressENTER key to confirm.

NOTEPress STOP key to abort.

9-5 Press ENTER key to confirm.

9-6 Press ENTER key to return to main menu.

ERASE RECORD1.ERASE SINGLE RECORD2. ERASE ALL RECORDS

ERASE RECORDNUMBER: XX

RECORD NUMBER: XXERASED!

ERASE ALL RECORDS! Are you SURE?“ENTER” TO CONTINUE

ERASING RECORDS PLEASE WAIT

RECORDS ERASED!


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5.10 Computer Interface ProcedureThis procedure describes the steps to put theDMOM-200 in computer interface.

Table 10.0 Computer Interface ProceduresSTEP ACTION DMOM-200 DISPLAY10-1 Press key #4 (NEXT PAGE) on the

SETUP MENU to display theCOMPUTER CONTROL interface (ITF)and SET TIME options menu.

10-2 Press key #1 (COMPUTER CONTROL)to place the DMOM-200 under anexternal PC’s control. PC softwarepermits DMOM-200 test record to betransferred to the PC.To end the PC control, press the STOPkey, which will restore control to thekeypad and return to the START MENUdisplay.

5.11 Set Clock ProceduresThis procedure describes the steps to set theDMOM-200 real time clock.

Table 11.0 Set Clock ProceduresSTEP ACTION DMOM-200 DISPLAY11-1 When key #4 (NEXT PAGE) is pressed on

the SETUP MENU, the COMPUTERCONTROL interface (ITF) and SET TIMEoptions menu displays.

11-2 On the first NEXT PAGE menu, press key #2(SET TIME) to go to steps for setting thetime and date clock.

11-3 Enter month, day, year, hour, minute, andsecond for real-time clock. Display will nowreturn to the START MENU.

This completes the Set Clock procedure.

1. COMPUTER CONTROL2. SET TIME

COMPUTER ITF MODE

1. COMPUTER CONTROL2. SET TIME

ENTERMM-DD-YY HH-MM-SS


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5.12 Calibration CheckThis procedure describes the steps toperform the calibration check on theDMOM-200.

Table 12.0 Calibration Check ProcedureSTEP ACTION DMOM-200 DISPLAY12-1 The calibration check is a functional

verification self-test of the DMOM-200.This procedure begins by pressing key #3on the START MENU, which displays acalibration check prompt to attach test leadclips to a shorting bar (See Figure 8.0).

12-2 When test lead clips are attached to ashorting bar, press ENTER key to proceedwith self-testing process. The self-testfeature checks ramping current and displayscurrent at each point in a continuous ramp.When the ramp flattens, the remaining self-check automatically sequences withoutoperator control. If any circuit fails (doesnot pass), then do not measure anyresistance until the problem is corrected.

12-3 Automatic; no operator action required.





CALIBRATION CHECK

CONNECT SHORTING BAR“ENTER” TO CONTINUE

RUNNING CAL CHECK…RAMPING CURRENT: xx%

RUNNING CAL CHECK…CURRENT RAMP CKT

“PASS”

RUNNING CAL CHECK…ZERO CKT CHECK

“PASS”

RUNNING CAL CHECK…FSCALE CKT CHECK

“PASS”

RUNNING CAL CHECK…MEAS CKT CHECK

“PASS”

RUNNING CAL CHECK…RAMPING CURRENT: xx%


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Table 12.0 Calibration Check Procedure (Continued)STEP ACTION OBSERVE RESULT12-8 Automatic; no operator action required.

12-9 Press any key to end CAL CHECK. Display returns to START MENU.

Figure 8.0 Bus Bar Connection

CAL CHECK COMPLETEPRESS ANY KEY


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APPENDIX A

DMOM-200 Troubleshooting Guide

Item

Symptom Possible Problem Solution

1 Reading is incorrect. 1. Poor connection at theClips.2. Broken sensing lead.

1.Check connection to make suresensing and current teeth aretouching the device under test(DUT).2. Inspect sensing cables.

2 No Test Current.(Current % read zero)and resistancereading=0

1. No test current goingthrough DUT.2. Drive circuit notworking.

1. Check Connection to DUT.2. Run Calibration Test.

3 Have test current butresistance reading = 0.

1. Broken sense leads.2. Reverse sense leads.

1. Inspect sense leads.

NOTE: DUT=Device Under Test


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APPENDIX B

DMOM-200 Cable Accessories

Plastic Quick-Disconnect Clip, C-Clamp, Current Connector, and Sensing-Wire Connector

C-Clamp

Plastic Clip

Current ConnectorSensing wire Connector

1710 Grevillea Court, Ontario, CA 91761, USAPhone: 909-923-9390 Fax: 909-923-9391

Website: http//www.vanguard-instruments.com

DMOM-200 06/22/01: OAK

Documents

for the MODEL DMOM-200 · EXPENDABLES.....Paper, thermally sensitive, 2.5-inch wide roll (VIC part # TP-3) WARRANTY.....One-year warranty on parts and labor; post warranty service