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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.

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Specifications
Range 2 Ω 20 Ω 200 Ω 2K Ω 20K Ω 200K Ω 2M Ω
Nominal Current 5 mA 5 mA .5 mA 50 uA 5 uA .5 uA 50 nA
Failsafe Current 8 mA 8 mA 1.5 uA 150 uA 15 uA 1.5 uA 15 uA
Resolution 100 uΩ 1 mΩ 10 mΩ 100 mΩ 1 Ω 10 Ω 100 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
Display 4 1/2 digit LED Terminal Trident
Temperature Coefficient ± .002% per 1°C Operating Temperature Range 0° to 50° C
Dimensions 10.62″ x 9.68″ x 4.87″ Weight 6.5 lbs.
Power 4 ea rechargeable 5AH NICAD batteries Max Input Voltage 250 VDC
Open Circuit 1.6 VDC Max Failsafe Current 8 mA
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