Ultra High Voltage + pA Current Resolution
Meet today’s demanding requirements for IR testing

98x6 knockout 1

Teraohmmeter
Insulation Resistance (IR) Tester

  • 6.5kV (981i) / 11kV (983i) DC voltage output
  • Faster IR measurement – 100ms
  • Higher IR range – 150T ohm
  • Multi-Dwell Functionality
  • pA current measurement
  • Made in USA
  • Meet UL、 CSA、TUV、 IEC test requirements
  • Standard interface – Ethernet、RS232 & digital I/O
  • Application: PV module, battery pack, power modules for EV vehicle, Cable, withstanding materials.
981 volt conti

Multi-Dwell Functionality

permits dwells at different voltage levels without having to return to zero between test steps – dramatically simplifying advanced analysis of dielectric properties.

Capacitive Loads

The 981i & 983i are specified for use with capacitive loads, most IR testers are not. This means the 981i & 983i are exceptional at performing IR tests on cabling PV panels and CMC devices


  • Highest Range of IR Test Voltage — 6.5KVDC or 11KVDC
  • Fast IR Readings — High speed dwell times as low as 100ms
  • High Resistance Measurement Range — up to 150 Teraohms
  • Sequency Memory holds up to 100 tests with up to 254 steps per test.
  • Multi-Dwell Functionality – without to return zero between test steps.
  • Ethernet, RS232, Digital I/O & Scanner Control , GPIB available
  • Pico-Amp Leakage Measurement
  • Multi-Mode IR – end on time, end on pass or end on fail or steady or rising
  • Continuously Variable IR Test Voltage – select the test voltage you need from 30V to 6.5KV. The 983i provides outputs from 60V to 11KV
  • Measure IR on Grounded Loads — add option HSS2 to make precise IR measurements on grounded loads
  • Light Weight Design -4.5 kg 981i/983i to whatever you’ve been using.
  • Safety Tested per EN 61010-1. EMC compliant to EN 61326-1
  • Manual Test Mode — Allows for variable voltage output during testing with continuous measurements and pass/fail indiciation until the user stops the test
  • Made in the U.S.A.