Insulation Tester or Tera Ohm Meter with Polarization Index
The Product above is made with two circuits below.
Tera Ohm Meter - Power Supply
Tera Ohm Meter - Chopper Amp
A regulated, low ripple, high voltage of very low current capability is applied by instrument on a DUT (device under test). The leakage current in nA or pA (picoamps, nanoamps) is measured and readout, The Innovation i did was to measure the current in Vref and not Vin of ICL7107, this made the 1/x computation.
Also using the ICL7650 Chopper Stabilized amplifier must be done as shown in data sheets with grounded guard rings. pA will leak on the PCB itself if layout is not done keeping this in mind.
- What is Insulation Testing?
- Insulation testing
- K8CU's HV Tester
- A Review of Polarization Index and IEEE Std. 43-2000
- Applications - Insulation Resistance Testing: Branom Instrument
- FAQ's - Insulation Resistance Test
- High Voltage Insulation Tester - TeraOhm
- BK Precision Insulation Tester Models 307 and 308
- BK Precision Insulation Tester Model 300
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