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selected test voltage: any voltage in the 50...1000 V range with 10 V step
automatic measurement in sockets with the UNI-Schuko adapter with possibility of configuring pairs of measured cables
continuous indication of insulation resistance or leakage current
automatic discharge of capacitance of tested object after the insulation resistance measurement
acoustic signalling of five-second periods to facilitate obtaining time characteristics
measured test times T₁ T₂ i T₃ to measure one or two absorption coefficients in the 1... 600 sec. range
indication of actual test voltage during the measurement
protection against measuring live objects
three-lead measurement.

Continuity measurement of protective and equipotential conductors according to EN 61557 - 4 with the >200 mA current

Low-voltage circuit continuity and resistance measurement:

circuit resistance measurement (<1999 Ω ) with the <15 mA current
quick sound signal if circuit resistance is below 30Ω.

Leakage current measurement.

Capacitance measurement during the R_ISO measurement

Measurement of alternating and direct voltages in the 0...600 V range.

990 memory cells and wireless data transmission to a computer using the USB - OR-1 adapted.

Power supply: 4 AA disposable or rechargeable batteries monitoring of power supply voltage.

Meters conform to EN 61557.

Electric safety:

type of insulation: double according to EN 61010 - 1 and IEC 61557
measurement category: IV 600 V (III 1000 V) according to EN 61010 - 1
protection class acc. to EN 60529: IP67

Other technical specifications:

power suply: 4 alkaline batteries or or battery package Ni-MH
weight: ~1 kg
dimentions: 220 x 100 x 60 mm

Insulation resistance measurement

Measuring range according to EN 61557 - 2 for U_N=50 V: 50 kΩ...2500 MΩ

Range	Resolution	Accuracy
00...9999 kΩ	01 kΩ	±(3% m.v. + 8 digits) [±(5% m.v. + 8 digits)]*
1000...9999 MΩ	0001 MΩ
100...9999 MΩ	001 MΩ
1000...2500 MΩ	01 MΩ

*for the WS-04 lead

Measuring range according to EN 61557 - 2 for U_N=100 V: 100 kΩ...5000 MΩ

Range	Resolution	Accuracy
00...9999 kΩ	01 kΩ	±(3% m.v. + 8 digits) [±(5% m.v. + 8 digits)]*
1 000...9999 MΩ	0001 MΩ
100...9999 MΩ	001 MΩ
1000...5000 MΩ	01 MΩ

*for the WS-04 lead

Measuring range according to EN 61557 - 2 for U_N=250 V: 250 kΩ...2000 GΩ

Range	Resolution	Accuracy
00...9999 kΩ	01 kΩ	±(3% m.v. + 8 digits) [±(5% m.v. + 8 digits)]*
1000...9999 MΩ	0001 MΩ
100...9999 MΩ	001 MΩ
1000...9990 MΩ	01 MΩ
1000...2000 GΩ	0001 GΩ

*for the WS-04 lead

Measuring range according to PN-EN 61557 - 2 for U_N=500 V: 500 kΩ...2000 GΩ

Range	Resolution	Accuracy
00...9999 kΩ	01 kΩ	±(3% m.v. + 8 digits) [±(5% m.v. + 8 digits)]*
1000...9999 MΩ	0001 MΩ
1000...9999 MΩ	001 MΩ
1000...9990 MΩ	01 MΩ
1000...9999 GΩ	0001 GΩ	±(4% m.v. + 6 digits) [±(6% m.v. + 6 digits)]*
1000...2000 GΩ**	001 GΩ	±(4% m.v. + 6 digits) [±(6% m.v. + 6 digits)]*

*for the WS-04 lead
**for the WS-04 lead range to 10 GΩ

Measuring range according to EN 61557 - 2 for U_N=1000 V: 1000 kΩ...1000 GΩ

Range	Resolution	Accuracy
00...9999 kΩ	01 kΩ	±(3% m.v. + 8 digits)
1000...9999 MΩ	0001 MΩ
1000...9999 MΩ	001 MΩ
1000...9990 MΩ	01 MΩ
1000...9999 GΩ	0001 GΩ	±(4% m.v. + 6 digits)
1000...9999 GΩ	001 GΩ
1000 GΩ	01 GΩ

Continuity measurement of protective and equipotential conductors with the 200 mA current

Measuring range according to EN 61557 - 4: 010...1999 Ω

Range	Resolution	Accuracy
000...1999 Ω	001 Ω	±(2% m.v. + 3 digits)
200...1999 Ω	01 Ω	±(2% m.v. + 3 digits)
200...1999 Ω	1 Ω	±(4% m.v. + 3 digits)

Voltage on open terminals: <8 V
Output current at R <2 Ω: I_SC >200 mA: I_SC >200 mA
Compensation of test leads’ resistance
Unidirectional current flow

Low-voltage and resistance measurement

Range	Resolution	Accuracy
00...1999 Ω	01 Ω	±(3% m.v. + 3 digits)
200...1999 Ω	1 Ω	±(3% m.v. + 3 digits)

Voltage on open terminals: <8 V
Current for closed terminals 5 mA < ISC < 15 mA
Sound signal and green LED on when measured resistance < 30 Ω ± 50%
Compensation of test leads’ resistance

Capacitance measurements

Range	Resolution	Accuracy
1...999 nF	1 nF	±(5% m.v. + 5 digits)
100...999µF	001µF	±(5% m.v. + 5 digits)

Capacitance value displayed during the R_ISO measurement
For test voltages below 100 V and measured resistance below 10 MΩ unspecified capacitance measurement error

Measurement of alternating and direct voltage

Range	Resolution	Accuracy
00...2999 V	01 V	±(2% m.v. + 6 digits)
300...600 V	1 V	±(2% m.v. + 2 digits)

Frequency range: 45...65 Hz

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