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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. Capable of making highly accurate resistance measurements from 2 Ω to 200 KΩ, this ohmmeter has a proven track record of durability: with 20+ year old units still being used in the field today. 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.

Description

Range, Resolution, Accuracy, & Current Levels

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 8 mA 8 mA
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

General Specifications

Display 4 1/2 digit LED Terminals Banana jack binding posts
Storage Temperature Range -20° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 9.75″ x 10″ x 3.25″ Weight 3.5 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

For further specifications (such as the various modified versions of this product) contact us or see the product data sheet.

Additional information

Weight 5 lbs
Dimensions 36 × 36 × 36 in
Contact To Purchase
  • Specifications
  • Ordering Information
  • Downloads

Range, Resolution, Accuracy, & Current Levels

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 8 mA 8 mA
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

General Specifications

Display 4 1/2 digit LED Terminals Banana jack binding posts
Storage Temperature Range -20° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 9.75″ x 10″ x 3.25″ Weight 3.5 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

For further specifications (such as the various modified versions of this product) contact us or see the product data sheet.

Pricing Request

    Downloads

    Data Sheet Manual