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A MESSAGE FROM THE PRESIDENT

We at AMPTEC RESEARCH would like to thank you, our customer, for selecting the 
AMPTEC 620VN Failsafe Igniter Tester/ Digital Ohmmeter.  Over the past 36 years our experienced 
engineering staff  have designed, manufactured and supplied earlier versions similar to 
the Model 620 and 620 Series Igniter Testers to the U.S. NAVY for the “TOMAHAWK CRUISE 
MISSILE”, and the Evolved Sea Sparrow Missile (

ESSM

), the  U.S. ARMY for the “STANDARD 

MISSILE”, the U.S.A.F. for the AIM-9 “ SIDEWINDER”,  AIM-7 “SPARROW” and AIM-120 
“AMRAAM” just to name just a few. We value the trust our customers have placed with us, and are looking 
forward to supporting any new requirement you may have .... 

Kerry Clark  - President AMPTEC RESEARCH 

 

U.S.   N.I.ST.  CALIBRATION  CERTIFICATE

AMPTEC RESEARCH, Inc. certifies that this instrument has been completely tested
 and inspected and found to meet published specifications as found in this manual on
the date stated on the attached N.I.S.T. Certificate.   AMPTEC RESEARCH, 
Corporation further certifies  that its calibration measurements are traceable to the U.S. National Institute of 
Standards and Technology. 

620VN  SERIES IGNITER TESTER WARRANTY

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 RMA number so we can keep track of the instrument and 
it’s owner (i.e. who to contact). The warranty period for this instrument is 1 year from when it was first 
shipped.  AMPTEC RESEARCH will repair or replace the instrument during the warranty period provided 
it is returned to AMPTEC  RESEARCH,  freight prepaid.  No other warranty is expressed or implied.  We 
are not liable for consequential damages.   No liability will be accepted if returned without such permission.  

Some AMPTEC products may have their design frozen, and no changes will be made without prior notice to 
the proper approving authority. Through out this manual, there is reference made using to the generic model 
620 series Igniter Testers. There are any versions of the 620 Igniter Tester specifically developed to meet 
our customers requirements. The specification, operation, drawing and schematic sections of this manual 
contain the unique detail that define the AMPTEC 620VN.  Due to continuing product refinement, due to 
possible parts going obsolete and other component manufacturer changes, AMPTEC RESEARCH reserves 
the right on rare occasions to change any of its products  specifications.

 

R M A

page 1

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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