The new 98x series of Tera ohm meters from Vitrek has been specially developed for those applications where the insulation resistance must be measured at relatively high voltages.

Think of the batteries in the current electric vehicles and also the insulation of solar panels.

The 981i offers an output voltage range up to 6.5 kV and the 983i even has a maximum output voltage of 11 kV.

The 98x series is built on the same DSP technology that Vitrek has established as a leader in hipot test systems; the 95x series. The 98x devices feature a unique combination of performance features, including: 

  • Multi-dwell Functionality (multiple steps without returning to zero between steps) 
  • High speed testing (with residence times up to 100 ms)
  • Pico-Amp Leakage measurement (with stable and accurate 50 Teraohm IR measurements)
  • Continuous Variable IR test voltage (adjustable over the entire output range of the instrument)
  • Multi-mode IR (three test modes: end on time, end on pass, end on fail)
  • Capacity test modes (critical for solar panels, wiring harnesses and other capacitive loads)


Using the Vitrek 964i high-voltage scanners, up to 64 test points can be measured automatically. Control is possible with the help of a PC and the Vitrek QT-enterprise software.

“The trend in power conversion systems is to work with ever-increasing operating voltages for greater operational efficiency,” says Chad Clark, Sales and Marketing Director at Vitrek. “The Vitrek 98x IR testers are designed to meet the requirements of today and in the coming years.” 

Should you need more information on this model, please check the datasheet of this product.

If you have questions about prices and/or delivery times, or would like a demonstration of the 98x Series Teraohmmeterplease contact us. We will be happy to advise you in choosing the best model for your application.


Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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