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LUDLUM MODEL 6

GEIGER COUNTER

February 2011

Serial No. 170123 and Succeeding

Serial Numbers

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Summary of Contents for Model 6

Page 1: ...LUDLUM MODEL 6 GEIGER COUNTER February 2011 Serial No 170123 and Succeeding Serial Numbers ...

Page 2: ...LUDLUM MODEL 6 GEIGER COUNTER February 2011 Serial No 170123 and Succeeding Serial Numbers ...

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Page 5: ...anty of merchantability or fitness which extend beyond the description of the face there of If the product does not perform as warranted herein purchaser s sole remedy shall be repair or replacement at the option of Ludlum Measurements In no event will Ludlum Measurements be liable for damages lost revenue lost wages or any other incidental or consequential damages arising from the purchase use or...

Page 6: ...S 1 GENERAL 1 2 SPECIFICATIONS 1 3 DESCRIPTION OF CONTROLS AND FUNCTIONS 1 4 OPERATING PROCEDURES 2 5 CALIBRATION 2 6 MAINTENANCE 2 PARTS LIST 4 Model 6 Geiger Counter 4 Circuit Board Drawing 363 X 452 4 Wiring Diagram Drawing 363 x 466 5 DRAWINGS AND DIAGRAMS 6 ...

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Page 9: ...cts meter pointer to full scale when the detector is exposed to radiation intensities greater than the upper operating limit greater than 10 R hr METER 1 milli amp 6 4 cm 2 5 in scale with pivot and jewel movement RESPONSE TIME four seconds measured from 10 to 90 of full scale DETECTOR internally mounted 71412 tube SIZE 10 7 x 8 9 x 21 6 cm 4 2 x 3 5 x 8 5 in H x W x L less handle WEIGHT 1 4 kg 3 ...

Page 10: ...not available use a voltmeter with a minimum of 1000 megohm input resistance Do not use a vacuum tube type voltmeter for this adjustment unless an external high voltage multiplier probe is used Switch the instrument range multiplier switch to X100 position Place the detector on calibration range center line with the detector perpendicular to the radiation source Expose the detector to a calibrated...

Page 11: ...he battery contacts cleaned of any corrosion at least every three months If the instrument has been exposed to a very dusty or corrosive atmosphere more frequent battery servicing should be used Use a spanner wrench to unscrew the battery contact insulators exposing the internal contacts and battery springs Removing the handle will facilitate access to these contacts NOTE NEVER STORE THE INSTRUMEN...

Page 12: ...U3 ICM7555 06 6136 U4 TLC27M7IP 06 6248 U5 TLC372 06 6265 U6 LM385Z 1 2 05 5808 DIODES CR1 1N4148 07 6272 CR2 CR3 1N4007 07 6274 THERMISTORS R37 R38 RL1006 98 07 6332 Ref No Description Part No RESISTORS R1 R2 10k 10 7016 R3 2 2k 10 7012 R4 1 MEG 10 7028 R5 10k 10 7016 R6 SAT 2 37k TYP 12 7648 R7 1k 10 7009 R8 47k 10 7020 R9 10k 10 7016 R10 1 MEG 10 7028 R11 330k 10 7051 R12 10k 10 7016 R13 200 OH...

Page 13: ... 13 8169 SWITCHES S1 D3G0402N 08 6501 BATTERY B1 B2 DURACELL D 21 9313 Ref No Description Part No MISCELLANEOUS M1 PORT BEZEL W MOVEMENT 4363 188 PORT BEZEL W GLASS 4363 352 PORT METERFACE 7363 136 METER MOVEMENT 15 8030 PORTABLE KNOB 08 6613 MAIN HARNESS Model 6 8363 622 BATTERY CONTACT SET CASTING SCREENED Model 6 9363 324 CAN ASSY Model 6 4363 321 BATT LID W LATCHSET Model 6 9363 325 PORT HANDL...

Page 14: ...r February 2011 page 6 DRAWINGS AND DIAGRAMS Model 6 Front Panel Drawing No 363 x 262 before page 1 Main Circuit Board Drawing No 363 x 452 Main Circuit Board Layouts Drawing No 363 x 464 Wiring Diagram Drawing No 363 x 466 ...

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