The TENTECH MD5060B is a smart, 5 kV insulation tester and analyzer. Besides the conventional measurement of insulation resistances up to 5 TΩ, its advanced features allow to automatically measure both the Polarization Index and Dielectric Absorption Index, thus significantly simplifying testing of transformers. This insulation tester is a portable, rechargeable battery-powered equipment. Test voltage may be chosen from 250 V to 5 kV in 100 V increments. Due to its measurement principle (actual voltage and current readings) the accuracy of resistance measurement is not affected by any test voltage error. Nevertheless, the high-voltage generator is electronically stabilized with a better than 3% accuracy in open-circuit condition and for any normal operation battery condition.
 

The built-in chronometer automatically counts the elapsed time since the start of measurement. Measured values are transmitted through the USB interface and are printed in the built-in printer as a registration of the performed test. Furthermore, the measured values are stored in a non-volatile internal memory. Up to 4000 measured values may be stored, to be transferred afterward to a computer running the TLogger program. This advanced software allows a further analysis of the test results, including a graphical representation and automatic report generation.
 

Some other advanced features are useful to run the most sophisticated insulation analysis. Step voltage test, 200 mA continuity range, low resistance measurement, configurable pass-fail and timed measurements are automatically performed. The measurement parameters are stored in the non-volatile memory for an easy configuration.
 

In order to guarantee the operator safety, the cabinet is made of a high breakdown strength plastic. High security output terminals are placed in the furthest and most protected area of the equipment. A light indicator shows high-voltage presence and is switched-off when the capacitances (both internal and external) are discharged up to reaching a safe value. This instrument provides excellent performance both in laboratory and field works, under hard environment conditions.