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Home | Products | Explosive Bridge Wire Testing | 641N | Compact Ruggedized Failsafe Ohmmeter with Self-Test Feature

The AMPTEC 641N Igniter Tester was designed for military ordnance programs as a ruggedized product that can safely measure resistance on explosive devices such as squibs, flares, and explosive bridge wire. The 641N meter is an impressive 40% lighter and significantly more intelligent than its predecessor the 640N (thanks to the introduction of the self-test function). With multiple safety approvals, a durable/waterproof yet compact case, self-contained DC milliammeter and test resistors, a shielded Faraday cage design, and the new self-test feature, the 641N is among the safest and smartest products of its kind.

Description

Range2 Ω20 Ω200 Ω2K Ω20K Ω200K Ω2M Ω
Nominal Current5 mA5 mA.5 mA50 uA5 uA.5 uA50 nA
Failsafe Current8 mA8 mA1.5 uA150 uA15 uA1.5 uA15 uA
Resolution100 uΩ1 mΩ10 mΩ100 mΩ1 Ω10 Ω100 Ω
Accuracy± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± 1% of reading, ± 0.2% range
Display4 1/2 digit LEDTerminalTrident
Temperature Coefficient± .002% per 1°COperating Temperature Range0° to 50° C
Dimensions10.62″ x 9.68″ x 4.87″Weight6.5 lbs.
Power4 ea rechargeable 5AH NICAD batteriesMax Input Voltage250 VDC
Open Circuit1.6 VDCMax Failsafe Current8 mA
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Range2 Ω20 Ω200 Ω2K Ω20K Ω200K Ω2M Ω
Nominal Current5 mA5 mA.5 mA50 uA5 uA.5 uA50 nA
Failsafe Current8 mA8 mA1.5 uA150 uA15 uA1.5 uA15 uA
Resolution100 uΩ1 mΩ10 mΩ100 mΩ1 Ω10 Ω100 Ω
Accuracy± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± .02% of reading & range± 1% of reading, ± 0.2% range
Display4 1/2 digit LEDTerminalTrident
Temperature Coefficient± .002% per 1°COperating Temperature Range0° to 50° C
Dimensions10.62″ x 9.68″ x 4.87″Weight6.5 lbs.
Power4 ea rechargeable 5AH NICAD batteriesMax Input Voltage250 VDC
Open Circuit1.6 VDCMax Failsafe Current8 mA

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    Data Sheet Manual