Amptec Research 620UK-4 Maintenance And Operation Manual Download Page 1

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AMPTEC 620UK-4
SAFETY OHMMETER

PHONE (512) 858-4045;

800-350-5105

website http://www.amptec.com

FAX (512) 858-4340; TOLL FREE IN THE USA

MAINTENANCE and OPERATION MANUAL

( 4 Wire Kelvin Version)

Amptec Research Corp.

13231 Rooster Springs Rd.

Austin, TX 78737 USA

T: +1 (512) 858-4045 // E: [email protected]

Summary of Contents for 620UK-4

Page 1: ...4045 800 350 5105 website http www amptec com FAX 512 858 4340 TOLL FREE IN THE USA MAINTENANCE and OPERATION MANUAL V4 4 Wire Kelvin Version Amptec Research Corp 13231 Rooster Springs Rd Austin TX 7...

Page 2: ...ICATIONS Table B 2 Specifications p 7 SECTION C REPLACEMENT AND ACCESSORY ITEMS C 1 Available Accessories and Test Leads p 8 SECTION D OPERATION FUNCTION AND USE D 1 General Use p 9 D 2 Front Panel p...

Page 3: ...Operation E 6 Trouble shooting or Diagnostic Test Procedure for AMPTEC 620UK Ohmmeter Printed Circuit Board p 18 E 6 1 Current Source PCB Diagnostic Routine p 18 E 6 2 DVM PCB Diagnostic Routine p 18...

Page 4: ...able and intrinsically safe means of measuring electrical resistance of aircraft chassis ground connections rocket motor squibs warhead squibs explosive bridge wire and on a variety of devices Featuri...

Page 5: ...h has two separate modes The ON position supplies internal battery isolated Anew set of AA batteriesintheAMPTEC 620UK batterypackisdesignedtolastapproximately1 year dependingupon use Duracell PlusType...

Page 6: ...high Ihigh Vlow and Ilow configuration Proper 4 Wire Kelvin connections automatically eliminate test lead wire length resistance and test lead connection contact resistance offsets which is what the z...

Page 7: ...isplay 20 000 counts 4 digit Liquid Crystal Display LCD with a back light for viewing the 620UK display in dim ambient light conditions Low Battery Indication The 620UK LCD Displays shows LOW BAT Over...

Page 8: ...eterwithalligatorcliptestleadset Option 620UK 290 Alligator Clip Test Lead Set 48 long ideal for connecting to wires some jacks and most exposed posts Option 620UK 401 Handheld Probe Test Lead Set ide...

Page 9: ...panel chassis ground panel jack and pin C of the NATO test lead connector are both chassis ground The AMPTEC 620UK user may use either chassis ground connection as a test lead shield provided the tes...

Page 10: ...ohmmeter is fitted with seven resistance ranges The lowest resistance range 2 0 Ohm provides resistance measurement capability from zero ohms up to the level of i 9999 Ohms Fullscale The AMPTEC 620UK...

Page 11: ...you have a V4 Kelvin version The AMPTEC 620UK Ohmmeter when measuring resistance measures the total of three in series items as shown above The first item is the actual test lead wiring resistance com...

Page 12: ...the leads at the end together For example if they are alligator clip option 620UK 290 or banana jack ends option 620UK 401 connect or short the ends to each other 3 Adjust the ten turn precision poten...

Page 13: ...ies offset resistance end of zeroing description D 3 Photo of AMPTEC 620UK in Carry Case Earth Connection between Case and Ohmmeter is shown The front panel of the AMPTEC 620UK houses the following co...

Page 14: ...y the AMPTEC 620UK Ohmmeter front and rear panels are aluminum shielded and have their individual chassis ground lug connections electrically wired to the units front panel chassis ground front panel...

Page 15: ...equipment are in good working order before attempting to troubleshoot the 620 series igniter tester If you turn on the AMPTEC 620UK display does not come on it may indicate the batteries need replaci...

Page 16: ...some safety ohmmeters i e ALINCO 101 series have a history of faulty service related i e wrong component or electrical current limit fault failures which have had catastrophic and deadly result when c...

Page 17: ...ohm resister you get a 50mV drop which inputs into the DVM PCB and is displayed as 10 000 Ohms The 200 Ohm range outputs a constant 500uA DC current When this current level 500uA is routed across a 1...

Page 18: ...rouble shooting or Diagnostic Test Procedure for AMPTEC 620UK Ohmmeter Printed Circuit Board diagnosis or replacement The following steps will facilitate the proper repair personnel to diagnose whethe...

Page 19: ...surement test leads across a known 10 0 Ohm resistance standard i e 0 005 or better Adjust RV401 so the display is the value of the 10 ohm resistance standard Next short the measurement test leads tog...

Page 20: ...er for filed install new AA batterries or can be optionally fitted with security screws Tamper resistant battery compartment lid screws make it extremely difficult for field personnel to install new b...

Page 21: ...ly Safe Certification 21 Sira 03ATEX2076 620UK Safety Ohmmeter EEx ib C T4 II Battery Holder Cover 4 Each type AA Only fit the following battery type Eveready Silver Seal type R65 or Eveready Ultras P...

Page 22: ...dance with the applicable code of practice IEC 60079 19 If the equipment is likely to come into contact with aggressive substances then it is the responsibility of the user to take suitable precaution...