- Insulation resistance measurement:
- measurement voltage any in the range of 50…1000 V at 10 V and 1000...5000 V at 25 V resolution,
- continuous indication of measured insulation resistance or leakage current,
- automatic discharge of measured object capacitive voltage after the end of insulation resistance measurement,
- acoustic signaling of 5 seconds intervals to facilitate capturing time characteristics,
- metered T1, T2 and T3 test times for measuring one or two absorption coefficients from the range of 1…600 s,
- adjustable measuring time to 99'59'’,
- polarization index (PI) and dielectric absorption ratio (DAR) measurement,
- indication of actual test voltage during measurement,
- 1.2 mA and 3 mA test current,
- step voltage insulation resistance measurement (SV),
- Dielectric Discharge calculation (DD),
- protection against measuring live objects,
- measurements with test leads up to 20 m - Continuity measurement of protective connections and equipotential bonding in accordance with PN-EN 61557-4 with current > 200 mA.
- Measurement of leakage current during insulation resistance testing.
- Measurement of capacity during the measurement of RISO.
- DC and AC voltage measurement in the range of 0…600 V.
- 990 cells of memory (11880 records) with the capability of wireless data transmission to a PC (with the USB-OR adapter) or through a USB cable.
- Power supply from battery packs, low battery warning indicator, built-in fast charger.
- Keyboard and display backlit.
The instruments meet the requirements of the EN 61557 standard.
Insulation resistance measurement (two-lead)
Measurement range acc. to IEC 61557-2: 50k…15,0 TΩ (IISOnom = 1,2 mA or 3 mA)
| Range | Resolution | Accuracy |
| 0,0...999 kΩ | 1 kΩ | ±(3% m.v. + 10 digits) |
| 1.00...9,99 MΩ | 0,01 MΩ | |
| 10.0...99,9 MΩ | 0,1 MΩ | |
| 100...999 MΩ | 1 MΩ | |
| 1.00...9,99 GΩ | 0,01 GΩ | |
| 10.0...99,9 GΩ | 0,1 GΩ | |
| 100...999 GΩ | 1 GΩ | ±(3.5% m.v. + 10 digits) |
| 1.00...9,99 TΩ | 0,01 TΩ | ±(7.5% m.v. + 10 digits) |
| 10.0...15,0 TΩ | 0,1 TΩ | ±(10% m.v. + 10 digits) |
Values of measured resistance depending on measurement voltage
| Voltage UISO | Measurement range |
| 250 V | 500 GΩ |
| 500 V | 1.00 TΩ |
| 1000 V | 2.00 TΩ |
| 2500V | 5.00 TΩ |
| 5000V | 15.0 TΩ |
Measurement of leakage current
| Range | Resolution | Accuracy |
| 0…ILmax | m, µ, n [A] | Calculated basing on resistance measurements |
· ILmax – maximum current at short circuit of leads,
· resolution and units result from the measurement range of individual insulation resistance.
Step voltage insulation resistance measurement
| Target voltage | Measurement voltage sequence |
| 1 kV | 200, 400, 600, 800, 1000 V |
| 2.5 kV | 0.5, 1, 1.5, 2, 2.5 kV |
| 5 kV | 1, 2, 3, 4, 5 kV |
· duration of each "step" adjustable from 30s to 5mins
· measurement result for each voltage step is stored in memory
Continuity measurement of protective connections and equipotential bonding with 200 mA current
Measurement range acc. to EN 61557-4: 0,12...999 Ω
| Range | Resolution | Accuracy |
| 0.00...19.99 Ω | 0,01 Ω | ±(2% m.v. + 3 digits) |
| 120.0...199.9 Ω | 0,1 Ω | |
| 200...999 Ω | 1 Ω | ±(4% m.v. + 3 digits) |
· Output current at R < 2 Ω: Imin > 200 mA (ISC: 200...250 mA)
· Compensation of test lead resistance
· Current flowing in both directions, mean value of resistance is displayed
Capacity measurement
| Range | Resolution | Accuracy |
| 1...999 nF | 1 nF | ±(5% m.v. + 5 digits) |
| 1.00...49.99 µF | 0.01 µF |
· Capacity measurement result is displayed after the RISO measurement
DC and AC voltage measurement
| Range | Resolution | Accuracy |
| 0.0...29.9 V | 0.1 V | ±(2% m.v. + 20 digits) |
| 30.0...299.9 V | 0.1 V | ±(2% m.v. + 6 digits) |
| 300...600 V | 1 V | ±(2% m.v. + 2 digits) |
The acronym “m.v.” stands for a “measured reference value”.