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RESEARCH

AMPTEC

AMPTEC 620LM Igniter Tester
OPERATION/MAINTENANCE MANUAL

18JUNE2013 REV. B

see website for latest address, contact information and updates

http://www.amptec.com

DIODE 2.0 20 2.0K 20M OHMS

5mA 5mA 50uA 50nA

FAILSAFE

CURRENT

25mA

FUNCTION/RANGES

620LM

Explosive Safety

Igniter Tester

i 2 3 4 5

TEST

i 2 3 4 5

AUSTIN, TEXAS USA - US DEFENSE LOGISTICS CAGE CODE 1CRL2
PHONE +01 (512) 858-4045
FAX +01 (512) 3858-4340

website http://www.amptec.com

Summary of Contents for 620LM

Page 1: ...N MAINTENANCE MANUAL 18JUNE2013 REV B see website for latest address contact information and updates http www amptec com i2345 AUSTIN TEXAS USA US DEFENSE LOGISTICS CAGE CODE 1CRL2 PHONE 01 512 858 40...

Page 2: ...ission and a return authorization RMA number must be obtained directly from AMPTEC s customer service department via phone FAX or email for repairs warranty or otherwise We need to issue you an RMA nu...

Page 3: ...d Continuous Operating Power A 4 Setup and Use CHAPTER B 620LM FAILSAFE OHMMETER SPECIFICATIONS Table B 2 Specifications CHAPTER C REPLACEMENT OPTIONAL ANDACCESSORYITEMS C 1 Available Accessories and...

Page 4: ...lay Pin Functions CHAPTER F ROUTINE MAINTENANCE F 1 General F 2 Required Test Equipment F 3 Calibration Procedure F 4 Battery Replacement Instructions CHAPTER G COMPONENT PARTS LISTS 620 400 Parts Ass...

Page 5: ...n a variety of applications Please check the last chapter of this manual for addendums that may apply to the 620LM A 2 Receiving Unpacking and Initial Inspection Should the AMPTEC shipping box appear...

Page 6: ...ith a polarity keyed box type Molex connector plug 436040 0200 This helps prevent the accidental use of any non approved AC DC Wall Adapter from being plugged into the AMPTEC 620LM rear panel power po...

Page 7: ...ght Light Emitting Diodes LED Over Range Indication select next higher range Display flashes Measurement Update Rate Approximately 300ms Voltage Protection Maximum Input 250VDC or AC without damage pe...

Page 8: ...ds Connector Adapters single pointed probes and operator manual etc Option RACK Rack Mount Adapter Option 620RACK includes an adapter tray that allows any AMPTEC 620 series tester to be flush panel mo...

Page 9: ...wired ON there is no power ON OFF switch When proper power is applied to the oolarized rear panel molex connector the meter is ON when rear panel power input is removed it is OFF Although this power i...

Page 10: ...ware version string The isolated AC DC Wall adapter is fitted with a box style polarity keyed Molex connector plug 436040 0200 This helps prevent the accidental use of any non approved AC DC Wall Powe...

Page 11: ...i nals using a 4 wire configuration as described in section D 3 Next connect the 4 wire Kelvin wires or test leads into the AMPTEC 620LM Igniter Tester rear panel For 620 series test leads other than...

Page 12: ...connection problem must be outside of the 620 series meter i e your wiring harness or the actual device under test connection If the 620 series meter doesn t agree with the test resistors then the met...

Page 13: ...on it usually means the batteries are dead and need charging or fuse needs replac ing If the 620LM exhibits problems that cannot be eliminated by reviewing Chapters B and D the following guidelines h...

Page 14: ...r move the replacement part until the solder has cooled Cold solder and bad solder joints can cause more problems Use the chassis ground connect to the common terminal of the functional test section c...

Page 15: ...s care of the digital part of the 4 digit 20 000 count dual slope conversion COUNTERS DISPLAY COMPARATOR BUFFER MULTIPLEXER ZERO CROSSING DETECTOR INTEG UUT CONTROL LOGIC INPUT SWITCH DC CONSTANT CURR...

Page 16: ...EGRATOR INTEGRATOR COMPARATOR COMPARATOR CAZ CAZ CSTRAY CSTRAY RINT RINT FIGURE E 2B PHASE ll INTEGRATE INPUT FIGURE E 2C PHASE lll AND DE INTEGRATE CINT CINT VIN VIN CREF CREF 3 3 1 1 2 2 6 6 5 5 4 4...

Page 17: ...ished in Phase I The time or number of counts required to do this is proportional to the input voltage E 4 1 Reference Voltage The precision reference voltage required to do the A D conversion is deve...

Page 18: ...ic will show that the output of IC202 6 is actually applied to the base of transistor Q202 which acts as a current limiter The worst case component failure that could occur in this circuit would be a...

Page 19: ...cuit The 15V power supply is generated by IC7 for the digital voltmeter DVM chip set IC1 and IC2 The 5 VA is developed by one DC to DC convertor circuitry composed of Q103 Q104 T102 D103 D104 IC102 fo...

Page 20: ...alibration Procedure The AMPTEC 620LM should be calibrated but first it should be allowed to warm up for a minimum of 15 minutes before beginning the calibration procedure 620LM The calibration trimpo...

Page 21: ...ased and the voltage sensitivity of the voltmeter section is decreased Using the RS232C interface select the diode test function on the 620LM Igniter Tester Connect the rear panel measurement test wir...

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