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M191 High Resistance Decade - Insulation Tester Calibrator

High resistance calibrator for insulation testers up to 10 kV. Other insulation related functions include HV capacitance, short current, dielectric and polarization parameters and timer test.

  • Six different calibration functions
  • 1 TΩ and 10 kVdc limits
  • Test voltage and current indication

M191 Insulation Tester Calibrator is based on 1 TΩ programmable high resistance decade with 10 kV DC compliance, coupled with test voltage meter. This setup allows for calibration of UUT's test voltage, short current verification, timer function verification and calibration of dielectric parameters measurement including polarization index (PI), dielectric absorption ratio (DAR) and polarization ratio (PR).

Calibration domain

M191 is designed for thorough calibration of insulation testers, megaohmmeters, HIPOT testers or any other DC high resistance meters and safety testers with test voltage up to 10 kV. With M191's pallete of functions you'll no longer need multiple instruments and complex setups for high voltage calibrations.
RS-232 and GPIB interface allow for remote control of the calibrator and time saving automated calibrations using SW package CALIBER/WinQbase.

DC resistance 10 kΩ - 1 TΩ, 10.5 kV max.
± 0.1% / year
DC capacitance 10 nF, 50nF, 100 nF, 5.25 kV max.
± 0.5% / year

Test Signal Meter

DC voltage 50 V - 10.5 kV
± 0.5% / year
DC current 0 - 5 mA
± 0.2% / year
Datasheets pdf pdf
Manuals pdf
LabVIEW driver zip

Versions & Options:

M191 base version with RS232 & GPIB
All Meatest instruments are available with 3, 4 and 5-year extended warranties.
Delivered with EU plug. Can be swapped for other types on demand.


option 10 Test cable 1000V/20A, 1m, black
option 191-11 Test cable 5000V/20A, 1m, red
option 191-12 Grounding cable, 1m, green
GPIB cable IEEE488-IEEE488 cable, 2m
RS232 adapter RS232-USB generic adapter
RS232 cable male-female RS232 cable, 2m