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Amptec Research 620VN, Operation & Maintenance Manual, Page: 1 / 22

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Explosive Safety Igniter Tester

 AMPTEC 620VN

                  OPERATION/MAINTENANCE MANUAL

                  AUSTIN, TEXAS  78759  USA   CAGE CODE 1CRL2
                  PHONE +001 (512) 858-4045  or  1-800-350-5105 (from the USA)
                  FAX  +001 (512) 3858-4340   or   1-800-430-5440 (from the USA)           website   http://www.amptec.com

Preliminary Manual Revision A  10APR2013

Summary of Contents for 620VN

Page 1: ...OPERATION MAINTENANCE MANUAL AUSTIN TEXAS 78759 USA CAGE CODE 1CRL2 PHONE 001 512 858 4045 or 1 800 350 5105 from the USA FAX 001 512 3858 4340 or 1 800 430 5440 from the USA website http www amptec...

Page 2: ...Permission 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 RM...

Page 3: ...B 1 Specifications SECTION C REPLACEMENT OPTIONAL ANDACCESSORYITEMS C 1 Available Accessories and Options SECTION D OPERATION FUNCTION AND USE D 1 General D 2 Front Panel D 3 RS232C Computer Control a...

Page 4: ...ctrical Schematics Rev E Main PCB 620RMS 070 DVM1 1of 2 and 620VL 070 Current I source 2 of 2 Source 620VN Main PCB Bill Of Materials components parts list page 1 of 2 620VN Main PCB Bill Of Materials...

Page 5: ...n power as a floating 5VDC A 3000 VAC Isolation Hipot Test Report is available from AMPTEC s engineering department that has established the isolation of the 2 stage OP247 as being at least Isolated t...

Page 6: ...er Remote Control Interface The AMPTEC 620VN safety meter is normally configured with the option 232 an optically Isolated Serial Interface It that allows computer controller to remotely send I O comm...

Page 7: ...ce of the device under test Option 247 for continuous operation 24Hr 7day Dual stage isolation provides safe power for 620 series Igniter Tester to safely run continuous 24 Hrs day without batteries I...

Page 8: ...link which indicates overrange whichis also available via the automated control RS232C Interface D 1 General Operation This section contains operating instructions for the AMPTEC 620VN Explosive Safet...

Page 9: ...eception of a R command R Read Commands RS232C I O to output a single data string 1 resistance reading r0 De Selects all Ranges r1 Selects the 20 Ohm Range r2 Selects the 200 Ohm Range r3 Selects the...

Page 10: ...l 4 Ensure that communication specifications are as follows 9600 bits per second 8 data bits No parity bit One 1 stop bit No flow control 5 Start testing each range of the unit via the RS232C interfac...

Page 11: ...ing displayed on screen corresponding to the range that the unit is currently operating in ii Must be in Single Read Mode to receive this command properly C i Should receive prompt Continuous Read Mod...

Page 12: ...range selected on the AMPTEC 620 tester Connecting VHI to IHI and Vlo to Ilo eliminates the wandering open circuit display condition Figure D 1 above illustrates the 4 wire princi ple eliminates lead...

Page 13: ...urement error if not compensated for Many Ordinance test procedures have the 620 series Igniter Tester user short their wiring harnesses at the very end by the squib and record the resistance value or...

Page 14: ...Igniter Tester and the display does not come on it usually means the AC to DC Adapter isn t supplying power or fuse needs replacing If the 620VN exhibits problems that cannot be eliminated by reviewi...

Page 15: ...Do not touch or 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...

Page 16: ...ICL71C03 takes 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...

Page 17: ...ER 1 F 1 F INTEGRATOR 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...

Page 18: ...g point established 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 conv...

Page 19: ...ts The voltage drop across the range resistor is 0 5 volt just as it was when the output terminals were shorted The current through RL is 5 milliamperes just as it was through the jumper when the outp...

Page 20: ...5 6 7 PIN 14 13 12 11 10 9 8 Figure E4 620 series LED Display Pin Out Detail Functions The 620VN Tester measurement circuitry is also failsafe current limited even under worst case component failure...

Page 21: ...Option 300 Kelvin Clip Lead Set F 3 Calibration Procedure The 620VN Igniter Tester must be calibrated with a fully charged battery pack and should be allowed to warm up for a minimum of 15 minutes be...

Page 22: ...RS232C serial interface If the low battery LED is illuminated 620VN Series Igniter Tester readings should not be trusted The AMPTEC 620VN is powered by an external battery if the meter indicates LOW B...

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