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620ES | Mid Range Digital Failsafe Ohmmeter

The AMPTEC 620ES failsafe ohmmeter was specifically designed for ultra-safe testing on squibs, flares, bridge-wire, and other explosive devices. The 620ES meets mid-range resistance requirements and offers a fail-safe current limiting resistor network circuitry to insure test currents cannot exceed 8 mA. This product was derived from the USAF Non-Nuclear Munitions Safety Board approved AMPTEC 620A-4 meter – thus creating a product line that is the industry standard in igniter testing.

This item is not available for purchase through our website. Please contact us for more information.

Range 2 Ω 20 Ω 200 Ω 200K Ω
Nominal Current 5 mA 5 mA 50 uA .5 uA
Failsafe Current 8 mA 8 mA 1.5 uA 1.5 uA
Resolution 100 uΩ 1 mΩ 10 mΩ 10 Ω
Accuracy ± .02% of reading & ± .05% of range ± .02% of reading & range ± .02% of reading & range ± .02% of reading & of range
Display 4 1/2 digit LED Terminals 4-wire Kelvin
Storage Temperature Range -10° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 9.75″ x 10″ x 3.25″ Weight 3 lbs.
Power 4 ea rechargeable 5AHr NICAD batteries Max. Input Voltage 250 VDC
Open Circuit 1.6 VDC Max. Internal Voltage 4.8 VDC
Update 3 readings/second Temperature Coefficient ± .002% per 1° C
Ordering Information

This product is unavailable for online purchase. For specific pricing information or to place an order for a 620ES failsafe ohmmeter, please contact us today.

Product Description Price
620ES Includes 620ES failsafe ohmmeter, (OP-300) lead set, (620-DC) battery charger, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 620ES ohmmeter is compatible with our 620 Series probe/lead sets and accessories.
Please note that due to a significant backlog, any orders for instrumentation which need to be shipped from our facility by the end of 2021 must be placed by October 8, 2021. We apologize for any inconvenience this may cause.