Bicron Surveyor M Manual

Surveyor M Portable Count-Rate MeterWith Digital Scaler Option

User's Manual

Publication No. 1064-0-U-0594-001

* * * Release Date * * *

May 19, 1994

Part No. 1064902Bicron

Saint-Gobain/Norton Industrial Ceramics Corporation6801 Cochran Road ! Solon, Ohio, U.S.A. 44139

1-800-472-5656 1-216-248-7400

Publication Number: 1064-0-U-0594-001Part No. 1064902

Original Issue

NOTICE

Bicron reserves the right to make changes to any product to improve reliability,function or design and does not assume any liability arising from either applicationor use of any product or circuit described herein.

Information presented in this publication has been carefully checked and is believedto be entirely reliable; however, no responsibility is assumed for inaccuracies.

Furthermore, the information does not convey to the user any license under thepatent rights of Bicron or others.

Specifications subject to change without notice.

LIMITED RIGHTS LEGEND

The data in this manual is considered "proprietary data." It may be duplicated andused by or on behalf of the customer with the express limitations the "proprietarydata" may not be disclosed outside the customer or be used for purposes ofmanufacture without prior permission of the seller.

This legend shall be marked on any reproduction of this data in whole or in part.

(C) Copyright Saint-Gobain/Norton Industrial Ceramics Corporation, 1994All rights reserved

Printed in U.S.A.

Surveyor M Portable Count-Rate Meter1064-0-U-0594 Page 1

User’s Manual

FOREWORD

This manual provides the basic installation,operation, and maintenance procedures for theBicron Surveyor M Portable Count-RateMeter.

Section 1.0 Introduction provides a generaldescription of the instrument and its operation,and a detailed listing of its physical andperformance specifications.

Section 2.0 Battery Installation describes theprocedure for changing the battery andchecking its performance.

Section 3.0 Setup describes the settings forthe GM Probe and the Scintillation Probe, andhow to set the High Voltage.

Section 4.0 Operation provides a detaileddescription of all the features, settings, andcomplete operating instructions for theSurveyor M.

Section 5.0 Circuit Description provides abrief description of the three electronic circuitsthat make up the instrument.

Section 6.0 Calibration provides directionsfor calibration of the instrument.

The Appendices are: A) QC AcceptanceProcedure which includes calibrationprocedures, B) a complete spare parts list soinstruments can be repaired on-site, and C)schematic and pictorial diagrams to facilitaterepair procedures.

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User’s Manual

TABLE OF CONTENTSSection PageWarranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Procedures and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.0 Introduction1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.0 Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.2 Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.3 High Voltage Measurement . . . . . . . . . . . . . . . . . . . . . . . 9

3.0 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1 GM Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2 Scintillation Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.3 High Voltage Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.0 Operation4.1 Radiation Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . 124.2 External Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.3 Internal Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.0 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.0 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

AppendicesA QC Acceptance Procedure, Number 1064930 . . . . . . . . . 17

B Spare Parts List, Number 1064910 . . . . . . . . . . . . . . . . . . 21

C Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25


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User’s Manual

STANDARD WARRANTY

Instruments and options manufactured by Bicron are warranted against defects inmaterials and workmanship for a period of two years from the date of shipment,unless otherwise agreed upon by Bicron and the customer.

Bicron's obligation with regard to such products shall be limited to repair orreplacement, FOB Bicron factory or authorized repair station, at Bicron's option.

The calibration (when applicable) for each instrument is warranted to be within itsspecified accuracy at the time of shipment. If this initial calibration is determinedto be in error, the instrument will be recalibrated at no charge, provided it isreturned as described above.

EXCLUSION OF WARRANTY

The aforesaid warranty does not cover instruments, options or probes that aresubject to excessive physical abuse or are used for purposes other than thoseintended. In no event shall Bicron be liable for consequential or special damages,transportation, installation, adjustment, work done by the customer or otherexpenses that may arise in connection with such defective product or parts.

There are no warranties, express or implied, including without limitation anyimplied warranty of merchantability or fitness, which extend beyond the descriptionof the face hereof. This express warranty excludes coverage of and does notprovide relief for incidental or consequential damages of any kind or nature,including, but not limited to loss of use, loss of sales, or inconvenience. Theexclusive remedy of the purchaser is limited to repair, recalibration, or replacementof the instrument at Bicron's option.

This warranty specifically excludes the following items which are covered by theiroriginal manufactures' warranties: photomultiplier tubes, GM and proportionaltubes, crystal and other solid-state detectors, and batteries.


User’s Manual

PROCEDURES and CAUTIONSThe equipment herein described is designed and manufactured in compliance withall applicable safety standards. Nevertheless, certain hazards are inherent in theuse of electronic and radiometric equipment.

Adequate warnings are included in the manual and on the product itself to coverhazards that may be encountered in normal use and servicing of this equipment.No other procedures are warranted by Bicron.

It shall be the owner's or user's responsibility to ensure that the procedures andcautionary notes are heeded.

Failure on the part of the user in any way to follow the prescribed procedures shallabsolve Bicron and its agents from any resulting liability.

This instrument is intended solely for the detection and measurement of ionizingradiation. It should be used only by persons who have been trained in the properinterpretation of its readings and the appropriate safety procedures that should befollowed in the presence of radiation.

All instructions and warnings contained in this manual or on the instrument mustbe read before use and must be strictly followed. Failure to follow theseinstructions and warnings may result in inaccurate readings and/or user hazard.

Indicated battery and other operations tests must be performed prior to each useto assure that the instrument is functioning properly.

CAUTIONFAILURE TO CONDUCT PERIODIC PERFORMANCE TESTS INACCORDANCE WITH ANSI N323-1978, PARAGRAPHS 4.6 AND 5.4,AND TO KEEP RECORDS THEREOF IN ACCORDANCE WITHPARAGRAPH 4.5 OF THE SAME STANDARD, COULD RESULT INERRONEOUS READING OF POTENTIAL DANGER. ANSI N323-1978BECOMES, BY THIS REFERENCE, A PART OF THIS OPERATINGPROCEDURE.

INSPECTIONInstruments should be examined and tested as soon as received. Claims fortransportation damages, if any, should be filed at once with the delivery carrier.


User’s Manual

Figure 1External Controls

1.0 Introduction1.1 General DescriptionThe Bicron SURVEYOR M is a versatile,portable, count-rate meter used for thedetection and measurement of ionizingradiation when equipped with an appropriateGM (Geiger-Mueller) or scintillation probe.Its adjustable high voltage with readout on themeter enables the user to interchange GM andscintillation detectors with ease.

The optional built-in digital scaler providescounting times of 0.1, 1.0, and 10 minutes.The scaler features a crystal-controlledtimebase for greater accuracy.

The unit features a recessed metermovement, single ON-OFF-rangeselector switch, MHV probeconnector, mounted probe holder,front-panel high voltage adjustment,switch-selectable response time, andbuilt-in audio. Also included areinternally mounted controls for GMtube anti-saturation, dead-timecompensation, and full scale alarm.

1.2 Specifications

Radiation Detected: Alpha, beta,gamma, and X-ray, depending upondetector used.

Range: Four linear ranges of 0-1000, 0-10,000, 0-100,000, and 0-1,000,000 CPM (Counts perminute).

Accuracy: Within 10% of readingbetween 20% and 100% of full scaleon any range.

Detector: Choice of GM andscintillation probes.

High Voltage: Electronically stabilized,adjustable to at least 1600V with readout onthe meter.

External Controls: Seven-position rotaryswitch: off, battery check, high voltage, scalesX1000, X100, X10, X1; rotary audio andresponse switches; rotary high voltageadjustment control (Figure 1).

Internal Controls: Slide ON/OFF switchesfor controlling GM probe anti-saturation,dead-time compensation, and full-scale alarm.


User’s Manual

Figure 2Meter Scale

1.0 Introduction (cont'd)1.2 Specifications (cont'd)

Connector: MHV.

Warm-up Time: None.

Saturation: Switch selectable; typicallygreater than 1000 R/h on the X1, X10, andX100 ranges - for most GM probes; greaterthan 5 R/h for pancake GM detectors.

Response Time: Switch-selectable, optimizedfor each range, 0-90% of final reading asfollows:

Range TimeFast Slow

X1 12 sec. 20 sec.X10 1 sec. 8 sec.X100 <1 sec. 2 sec.X1000 <1 sec. 1 sec.

Temperature: Operational from -20 to+50 oC.

Humidity: No more than 5% change inreading from 10-95% Relative Humidity.

Battery Life: Typically 100 hours (200 hourswith parallel option) for GM probes in normalbackground, and 50 hours (100 hours withparallel option) for scintillationprobes. Sustained use of audio mayreduce life to less than these values.

Display: Ruggedized, recessed,high-torque 1 mA meter with 8.5cm (3.35 inches) scale marked 0-1000 counts per minute and 0-2.0kilovolts, with "bat. ok" band.Meter protected by impact resistantLexan® polycarbonate window.

Geotropism: Within +2% of full scale.

Shock: 100g per lightweight machine ofMIL-STD 202C, method 202B.

Vibration: 5g in each of three mutuallyorthogonal axes at one or more frequenciesfrom 10-33Hz.

Construction: Splash-proof, shock-proof,two-piece all-metal case. Scratch-resistantlaminated control panel and Bicron Kleen-Krome® trim on case top, durable blackpolyurethane paint on handle and case bottom,stainless steel probe clip.

Audio: A built-in speaker with panel mountedON-OFF switch provides audible "click" foreach detector pulse. With the speaker off, anaudible alarm sounds (if desired) when meteris greater than full scale on any range.

Scaler: 6-digit, 0.2" high LCD display withthree internally set time periods - 0.1, 1.0, and10 minutes; crystal-controlled time base has anaccuracy better than 0.1%.

Size: 10.8 X 20.3 X 17.3cm (4.25 X 8 X 6.8inches), including handle and probe clip.

Weight: 1 kg. (2.2 lbs.), excluding probe.


User’s Manual

2.0 Battery InstallationThe Surveyor M is delivered with a 9-voltMallory MN 1604 battery, or equivalent. Thissection defines the procedures for replacementand testing of the battery.

Note that some instruments have a parallel-wired battery option. In this case, twobatteries are wired into the circuit. Installinga second battery thus provides twice theoperational hours. Only one battery is neededto power the instrument, however.

2.1 Procedure1. Turn the instrument off.

2. Open pull catches at both ends of the caseand separate the bottom of the case fromthe top.

3. Install the battery in the appropriate clipon the bottom circuit board, observingproper polarity. The spare battery clip isappropriately marked.

4. Replace the bottom part of the case,orienting the rubber pad under thebattery; close the catches.

2.2 Battery TestTurn the control switch (Figure 1) to the "bat."position; the meter should display a readingwithin the "bat. ok" checkband.

2.3 High Voltage MeasurementTurn the control switch (Figure 1) to the "HV"position. Detector high voltage is directlydisplayed on the lower meter scale.


User’s Manual

3.0 SetupBoth GM and scintillation probes can be usedwith the Surveyor M. The choice of probedetermines which setup procedure should befollowed.

3.1 GM ProbesThe setup for GM probes requires that thehigh voltage be set (usually to 900V) beforethe probe is connected to the instrument.See Section 3.3 High Voltage Adjustment forprocedural details.

Recommended internal switch settings areshown in Table 1. Refer to Figure 3 for thelocation of the switches.

CAUTIONDo not use the X1000 range withGM probes. Erroneous readingsmay result.

Do not exceed the GM probe'smaximum high voltage rating.

3.2 Scintillation ProbesThe setup for scintillation probes requires thatthe high voltage appropriate to the applicationfirst be determined. To determine this highvoltage setting:

1. Turn the response switch to "fast".

2. Place a small reference source of the typeto be measured near the window of theprobe, in a fixed geometry.

3. Set the high voltage to zero. (See Section3.3 High Voltage Adjustment.)

4. With the instrument on one of its countingranges, slowly increase the high voltagesetting until counting begins.

5. Switch to high voltage and note thevoltage.

6. Increase the high voltage by 100 volts.

7. Switch to an appropriate counting rangeand note the counting rate.

SwitchID Name

FactorySetting

GM ProbeSetting

ScintillatorProbe Setting

SW3 Full ScaleAlarm

ON either either

SW6 DeadtimeCompensation

ON (Turn OFFfor calibration)

ON ON

SW7 Anti-saturation ON ON OFF

Audio OFF either either

Table 1Internal Switch Settings


User’s Manual

3.0 Setup (cont'd)3.2 Scintillation Probes (cont'd)

8. Repeat Steps 5, 6, and 7 until you find aregion where the counting rate remainsrelatively constant when the high voltageis varied by +50 volts (counting rateplateau).

9. Once this plateau has been found, recordthe counting rate and the high voltagesetting for future reference.

CAUTION

Do not exceed the scintillationprobe's maximum high voltagerating.

Recommended internal switch settings areshown in Table 1. Refer to Figure 3 for thelocation of the switches.

3.3 High Voltage AdjustmentThis control is located on the front panel foreasy adjustment of the detector high voltage.The actual high voltage setting is read on themeter scale when the selector switch is in the"HV" position (Figure 1).

Clockwise rotation of this control increases thehigh voltage, while counterclockwise rotationdecreases it. Note that it may take a fewseconds for the voltage to decrease followinga counterclockwise adjustment.

The normal factory high voltage setting is900V.

CAUTION

A high voltage setting higher thanthe maximum high voltagespecified for the probe being usedmay cause damage to the probe!


User’s Manual

4.0 Operation4.1 Radiation Measurement

1. Determine which type probe you will beusing.

2. Check the high voltage setting (Section2.3 High Voltage Measurement) andconnect the probe.

3. Set the appropriate external controls:audio, response, and counting rangesettings. See Section 4.2 ExternalControls for details.

4. Set the internal switches to theappropriate settings for your operation.See Section 4.3 Internal Controls fordetails.

5. Perform the survey, making sure tomultiply the meter reading by the countingrange setting to obtain the reading incounts per minute.

Note: When using GM probes, select only theX1, X10, or X100 counting ranges; do not usethe X1000 range. Any of the four ranges maybe selected when using scintillation probes.

6. If your meter is equipped with theoptional Digital Scaler, press the CountButton on top of the case to activate thedigital scaler. The Count Light willilluminate, indicating that a count is inprogress. When the light turns off, thecount time has been completed.

Once a count is started, the CountPushbutton is electronically locked out toprevent accidental restarting. If you wishto reset the scaler during a count, turn theinstrument off for a few seconds, thenturn it back on and press the CountPushbutton again.


User’s Manual

4.0 Operation (cont'd)

4.2 External ControlsAll the external controls are located on the topof the instrument (Figure 1).

AudioThe Surveyor M is equipped with an internalspeaker that will produce an audible click foreach detector pulse. This speaker is controlledby a panel-mounted ON/OFF switch labeled"audio".

If the Audio Switch is in the OFF position, anaudible "over-range" alarm will sound whenthe meter is approximately 30% or more abovefull scale on any range. When the AudioSwitch is in the ON position, the Over-rangeAlarm in not operational.

The Over-range Alarm also can be disabled byturning the Internal Alarm Switch (SW3) OFF.See Section 4.3 Internal Controls for details.

Response TimeIn addition to the built-in circuitry thatoptimizes response time for each range, a frontpanel switch labeled "response", with position"fast" and "slow" may be used to tailorresponse time to the survey situation.

Mode/Range SelectorThis seven position knob selects the operatingmode and the counts per minute scaling whenused in survey mode.

The off setting turns off all power to theunit.

The bat. position tests the voltage of thebattery; it should read in the "bat. ok"range of the meter.

The HV setting displays the output of thehigh voltage circuit in kilovolts.

The X1000, X100, X10, and X1 settingsare various scale ranges to be selectedbased on the radiation being surveyed.Note that the X1000 range should be usedonly with the Scintillator Probe.

Digital ScalerFor those units equipped with a Digital Scaler,the top mounted totalizer has six digitsavailable for displaying the total count. TheCount pushbutton is used to initiate a count;the light indicates when a count is in progress.


User’s Manual

Figure 3Main Circuit Board Assembly

4.0 Operation (cont'd)

4.3 Internal ControlsThree internal switches are included with thebasic Surveyor M to allow user customizationof some of the instrument's features. If theScaler Option is installed, a fourth internalswitch is included.

Full Scale Alarm SwitchThis ON/OFF switch is SW3 on Figure 3.When this switch is in the ON position, thefull-scale alarm circuit is enabled, and willsound only when the Audio Switch is OFF andthe count rate exceeds the upper end of themeter's range by 30%.

To disable the Full-scale Alarm, turn thisswitch OFF. The factory setting of this switchis ON.

Anti-saturation SwitchThis ON/OFF switch is SW7 on Figure 3.When this switch in ON, the anti-saturationcircuitry is enabled. This circuit is used toprevent over-range foldback of GM probesdue to GM tube saturation. With BicronEWGM and SWGM probes, over-rangefoldback is prevented in fields typically up to1000R/h; for the Bicron PGM, it is preventedin fields typically up to 5R/h.

The Anti-saturation Switch must be turnedOFF whenever a Scintillation Probe is used;otherwise, the voltage divider in the probe mayengage the anti-saturation circuitryerroneously.

The factory setting of this switch is ON.


User’s Manual

4.0 Operation (cont'd)4.3 Internal Controls (cont'd)

Dead-time Compensation SwitchThis ON/OFF switch is SW6 on Figure 3.When this switch is ON, the dead-timecompensation circuit is enabled. This circuitprovides dead-time loss correction for bothGM and scintillation probes.

Note: This switch will affect the frequenciesused to calibrate the instrument on the fourcount-rate ranges due to the effect of thedead-time correction circuit on the analogmeter reading. Typically, calibration will beperformed with this switch OFF. Refer to theQ.C. Acceptance Procedure (Appendix A) formore information.

The factory setting of this switch is ON.

Digital Scaler Count Time SwitchThis three position switch (SW102 on Figure3) controls the length of time during which thecounts are totaled when using the DigitalScaler Option. The available times are 0.1, 1,and 10 minutes, as indicated on the circuitboard. Be sure the instrument is turned OFFwhen changing the position of this switch.

The normal factory setting for this switch isone minute.

5.0 Circuit DescriptionThe electronic circuitry in the Bicron SurveyorM with Digital Scaler Option is contained onfour interconnected printed circuit boards.Modern solid-state integrated circuitry is usedthroughout. The major components are thefollowing:

1. High-voltage power supply. This is afeedback-regulated, electronicallystabilized supply for the detectorpotential. Additional circuitry provideshigh voltage readout on the meter scale.

2. Count-rate meter. A linear charge pumpratemeter converts the detector pulses toa count rate reading on the calibratedmeter scale. The circuitry includes aunique resolving time compensationtechnique to provide linear response overthe full range with both scintillation andGM probes, automatic and manual timeconstant selection, and temperaturecompensation.

3. Audio circuitry. This circuit provides forindividual pulse counting and the Over-range Alarm.

4. Digital scaler circuitry.

6.0 CalibrationThe SURVEYOR M, being a count-rateinstrument, is normally calibrated electronicallyin counts per minute.

Detailed calibration procedures are part of theQ.C. Acceptance Procedure found inAppendix A.


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User’s Manual

Appendix A

Bicron QC Acceptance Procedure Number 1064930Model: Surveyor M with Digital Scaler Option

1. Perform a visual inspection of the finishedproduct.

Note: See Figure 3 for the location of allCircuit Board components not labeled on theboard.

2. Remove the 9V battery and connect a9.30V+.05V power source across thebattery terminals on the battery board.

3. Perform the following adjustments:

a. Turn the control switch OFF.Mechanically zero the meter via therear adjustment screw on the meterbarrel.

b. Turn the control switch to X1000.Check the +5V supply at Pin 1 of U6(ICL 7663). The reading should be5VDC +0.5 V.

c. Leave the control switch set atX1000 and connect a voltmeterbetween pins 1 (ground) and 15 ofthe 24-pin connector. Adjust R31(50 kohm zero pot, "ZERO") until thevoltmeter reads 1 mVDC +2 1/2,-1 mVDC. Check the voltagereading on the X100, X10, and X1ranges. Little change should occur.

d. Turn the control switch to "HV" andconnect a high voltage measuringdevice with an impedance greaterthan 1000 megohms to the probeconnector center pin. Adjust thehigh voltage supply to +1000 VDC

+3% via R45 (20 kohm panelmounted pot, "HV").

e. Leave the control switch set to "HV"and adjust R29 (500 ohm span pot,"SPAN") until the meter reads 1.0KV. To test linearity, increase highvoltage to +1600 V. The metershould read 1.6 KV +5%. Decreasethe high voltage to +400 V. Themeter should read 0.4 KV +5%.

4. Perform a CPM Calibration.

a. Turn ON SW6 (dead-timecompensation), turn OFF SW7 (anti-saturation).

b. Connect a variable frequency pulsegenerator (amplitude of -1.5 v, pulsewidth of 10 microseconds) betweenPin 5 and Pin 1 of the 24-pinconnector header.

c. Adjust the frequency of the pulsegenerator to the value listed in TableT1 required to calibrate the unit at80% of full scale on the meter.

d. Adjust R21 (the 5 Kohm calibrationpot, X1000) until the meter reads80% of full scale.

e. Readjust the frequency of the pulsegenerator to the value listed in Table1 required to calibrate at 20% of fullscale.


User’s Manual

Appendix A (cont'd)

f. Note the meter readings from steps4d and 4e on a Certificate ofCalibration.

g. Repeat Steps 4c through 4f for theX100 range using R19 (the 50Kohm, X100 calibration pot).

h. Repeat Steps 4c through 4f for theX10 range using R17 (the 500Kohm, X10 calibration pot).

i. Repeat Steps 4c through 4f for theX1 range using R15 (the 5 megohm,X1 pot).

j. Turn SW6 OFF. Check the abovefour-range calibration, except usingTable T-2 for the calibrationfrequencies. No adjustment to any ofthe four potentiometers should berequired; this is a test of the linearityof the circuit without dead-timecompensation.

k. Leave the pulse generator connectedwhen calibration is complete.

l. Mark all trimpot bodies to show thegeneral position of the adjustmentscrews after calibration.

5. Turn the response switch to "fast" and thecontrol switch to "X1000". Vary thefrequency of the pulse generator to obtaina reading near full scale and switchbetween "fast" and "slow" to check theoperation of the response switch. Do thesame for the X100, X10, and X1 ranges.Leave the pulse generator connected.

6. Test the audio as follows:

a. Turn the Audio Switch ON andcheck to see that the audio functionsproperly on all four counting ranges,using the pulse generator. Also,check that the audio remains silentwhen the selector switch is on "bat."and "HV".

b. Turn the Audio Switch OFF andSW3 (alarm ON/OFF switch) on themain PC board to ON. Drive themeter well beyond full scale with thepulse generator and observe that acontinuous tone is heard. Do this onall four counting ranges.

c. Disconnect the pulse generator.

7. Turn the control switch to "HV" andadjust the high voltage to +900 VDC viathe front panel control. Test the anti-saturation circuit as follows:

a. Turn the control switch to the"X1000" position and connect a 500megohm resistor across the probeconnector (from +900V to ground).The meter should peg beyond fullscale.

b. Replace the 500 megohm resisterwith a 2000 megohm resistor. Themeter should remain at zero.Remove the 2000 megohm resistorand reinstall the 500 megohmresistor.

8. Remove all test equipment. Turn theinstrument OFF and install a new 9 voltbattery in the appropriate battery holder.(Either holder may be used if the holdersare parallel-wired.)


User’s Manual

Appendix A (cont'd)

9. Attach a probe to the instrument,observing the proper high voltageprecautions. Place the probe near anappropriate check source and turn theselector switch to each of the four rangesin turn. A meter reading should beobtained for each range.

10. If the instrument is equipped with theDigital Scaler Option, perform thefollowing tests:

a. Connect a frequency counter to pin11 of U101 (4011 IC). Thefrequency should be 32.768 kHz +0.1%.

b. Set the digital scaler for a 0.1 minutecount time. Turn the control switchto one of the four counting ranges and press the

"count" pushbutton. Time the countperiod; it should be 0.1 minutes.

c. Set the digital scaler for a 1 minutecount time. Turn the control switchto one of the four counting rangesand press the "count" pushbutton.Time the count period; it should be1.0 minutes. Compare the CPMreading on the analog meter to thedigital scaler total count; they shouldbe the same.

11. Turn the instrument OFF and disconnectthe probe. Make sure that the internalswitches are set as follows: SW3 (alarm)ON, SW6 (dead-time compensation) ON,and SW7 (anti-saturation) ON.

12. Complete, date, and sign a Certificate ofCalibration.


User’s Manual

Appendix A (cont'd)

TABLE T-1Calibration with SW6 (Dead-time Compensation) ON

Range Pulse Generator Actual Acceptable Meter Output (HZ) CPM Reading (CPM)

X1000 (80%) 11,110 800,000 720,000 - 880,000X1000 (20%) 3,185 200,000 180,000 - 110,000X100 (80%) 1,310 80,000 72,000 - 88,000X100 (20%) 330 20,000 18,000 - 22,000X10 (80%) 133 8,000 7,200 - 8,800X10 (20%) 33.3 2,000 1,800 - 2,200X1 (80%) 13.3 800 720 - 880X1 (20%) 3.3 200 180 - 220

TABLE T-2Calibration with SW6 (Dead-time Compensation) OFF

Range Pulse Generator Actual Acceptable Meter Output (HZ) cpm Reading (cpm)

X1000 (80%) 13,333 800,000 720,000 - 880,000X1000 (20%) 3,333 200,000 180,000 - 220,000X100 (80%) 1,333 80,000 72,000 - 88,000X100 (20%) 333 20,000 18,000 - 22,000X10 (80%) 133 8,000 7,200 - 8,400X10 (20%) 33.3 2,000 1,800 - 2,200X1 (80%) 13.3 800 720 - 880X1 (20%) 3.3 200 180 - 220

Note: The values in the above tables may not correspond to those for other Bicron or competitive models.


User’s Manual

Appendix B

Spare Parts List No. 1064910Bicron Surveyor M with Digital Scaler Option

Schematic Symbol Description Part No.Main PC Board Assembly 1029010

C1, C22 Capacitor, 0.1 FF, Film 9211041C2, C18, C19 Capacitor, 0.001 FF, 3kV cer. 9201022C3 Capacitor, 0.001 FF, Film 9211021C5, C20 Capacitor, 33 FF, 16 V tan. 9233362C6, C7, C23 Capacitor, 0.01 FF, Film 9211031C8 Capacitor, 2.2 FF, 16 V tan. 9232251C9, C25 Capacitor, 1.0 FF, 35 V tan. 9231051C10, C13, C17 Capacitor, 0.22 FF, Film 9212241C11, C12, C21, C24 Capacitor, 0.047 FF, Film 9214731C14 Capacitor, 180 pF, N750 cer. 9202011C15, C16 Capacitor, 0.01 FF, 3 kV cer. 9201032D1, D2, D4-10, D13-D17, D20 Diode, 1N4148 9600004D11, D12 Rectifier, 2kV PIV 9600001Q1 Transistor, 2N4124 9610001Q2 Transistor, 2N5210 9600005Q3 Transistor, 2N4126 9610002R1 Resistor, 10k, 1/4w, 5% 8110022R2 Resistor, 200 ohms, 1/4w, 5% 8120002R3 Resistor, 27k, 1/4w, 5% 8127024R4 Resistor, 1.3k, 1/4w, 5% 8113012R5 Resistor, 4.7k, 1/4w, 5% 8147012R6, R56, R57 Resistor, 10k, 1/4w, 5% 8110024R7, R8 Resistor, 4.7k, 1/4w, 5% 8147014R9 Resistor, 10k, 1/4w, 1% 8510024R11, R12, R22 Resistor, 100k, 1/4w, 5% 8110034R13, R50 Resistor, 274k, 1/4w, 1% 8527434R14 Resistor, 4.99 meg, 1/4w, 1% 8549941R15 Trimpot, 5 meg 9395051R16, R38 Resistor, 499k 1/4w, 1% 8549934R17 Trimpot, 500k 9395041R18, R39 Resistor, 100k, 1/4w, 1% 8549924R19, R31 Trimpot, 50k, 9395031R20, R27 Resistor 4.99k 1/4w, 1% 8549914R21 Trimpot, 5k, 9395021R23, R34-R36, R41, R55, R58 Resistor, 1 meg, 1/4w, 5% 8110044R24, R40, R44, R54 Resistor, 470k, 1/4w, 5% 8147034R28, R46 Resistor, 82.5k, 1/4w, 1% 8582524R29 Trimpot, 500 ohm 9395011R30 Resistor, 249 ohm, 1/4w, 1% 8524904


User’s Manual

Appendix B (cont'd)


Schematic Symbol Description Part No.R32 Resistor, 1 meg, 1/4w, 1% 8510044R33 Resistor, 11k, 1/4w, 1% 8511024R37 Resistor, 1000 meg, 1% 8810071R42, R43 Resistor, 2.7k, 1/4w, 5% 8127014R47, R51, R52 Resistor, 3.3meg, 1/4w, 5% 8133044R48 Resistor, 100k 1/4w, 1% 8510034R49 Resistor, 23.7k, 1/4w, 1% 8523724RN1 Res. Network, 7 x 220k 8822031SW3, SW6, SW7 Switch, Slide, SPST 9550001U1 Int. Ckt., MC3302PDS 9640002U2 Int. Ckt., MC14538BCPDS 9650004U3 Int. Ckt., MC14093BCPDS 9650001U4, U5 Int. Ckt., CA5160BEX 9640001U6 Int. Ckt., ICL7663CPA 9640003U7, U8 Int. Ckt., CD4016BEX 9650002XFMR Transformer, M8149 9500001

Connector, 24-pin 9780001

Switch PC Board Assembly 1029020R26 Resistor, 681 ohm, 1/4w, 1% 8568104SW2, SW4 Switch, Rotary, 2 pos. 9560003SW5 Switch, Rotary, 7 pos. 9560001

Sounder 9720001Header, 24-pin 9780002

Battery PC Board Subassembly (standard) 9420001Battery PC Board Subassembly (parallel-wired option) 9420002

Case Top Subassembly (standard) 1029140Handle 9710002Meter Assembly 9400026Meter Window 9400011Meter Support Bracket 9850002MHV Connector 9782001Probe Clip 9460004

Case Top Subassembly (with Scaler Option) 1064140SW101 Switch, Pushbutton 9550008

Rubber Boot 9960018Handle 9710002Meter Assembly 9400056Meter Window 9400011Meter Support Bracket 9850002MHV Connector 9782001Probe Clip 9460004


User’s Manual

Appendix B (cont'd)


Schematic Symbol Description Part No.

Case Bottom Assembly 1029050

Digital Scaler PC Board Assembly 9420013(required only with Digital Scaler Option)

C101, C102 Capacitor 22pF cer. 9202201C103 Capacitor, 33FF 16 V tan 9233362C104 Capacitor, 0.01FF film 9211031C105 Capacitor, 0.047FF film 9214731D102, D103 Diode, zener IN5231B 9600011R101 Resistor, 10 meg 1/4w, 5% 8110054R102 Resistor, 470k 1/4w, 5% 8147034R103, R105 Resistor, 100k 1/4w, 5% 8110034R104, R107, R108 Resistor, 1k 1/4w, 5% 8110014R106 Resistor, 3.3meg 1/4w, 5% 8133044R109 Resistor, 200 ohm 1/4w, 5% 8120004R110 Resistor, 4.7k 1/4w, 5% 8147014SW102 Switch, Slide 3-position 9550010U101 Int. Ckt. MC14011BCPDS 9650029U102, U103 Int. Ckt. MC74HC4040NDS 9650009U104 Int. Ckt. MC14093BCPDS 9650001U105 Int. Ckt. ICM7240IPE 9650021XTAL Crystal, 32.786kHz 9729002

LCD Display 9685001

MiscellaneousBT1, BT2 Battery, 9V alkaline, MN1604 9750001R45 Potentiometer 20k 9382031

Cable, Probe, MHV-MHV, 36-inch 9801001Knob, Round, w/pointer 9770001Knob, Function 9770003Knob, Round 9770004Guard, Round Knob 9100034Manual, Technical 1064900Spare Parts List 1064910Schematic Circuit Diagram 1064920QC Acceptance Procedure 1064930


User’s Manual

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User’s Manual

Appendix C

The drawings listed below follow this page.

1029920 Schematic Circuit Diagram9700241 Main PCB Assembly9700242 Switch PCB Assembly9700225 Schematic Circuit Diagram Digital Scaler Option9700226 Component Location, Digital Scaler Option


User’s Manual

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Bicron Surveyor M Manual