Megger MTR105, User Manual

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16. Specifications
Specification Detail
Insulation resistance
Accuracy Volts Accuracy
50 V 10 GΩ ±2% ±2 digits ±4.0% per GΩ
100 V 20 GΩ ±2% ±2 digits ±2.0% per GΩ
250 V 50 GΩ ±2% ±2 digits ±0.8% per GΩ
500 V 100 GΩ ±2% ±2 digits ±0.4% per GΩ
1000 V 200 GΩ ±2% ±2 digits ±0.2% per GΩ
Operational Uncertainty: IEC61557-2
Polarisation index (PI): 10 minute / 1 minute ratio
Dielectric absorption ratio (DAR): User configurable 15 s or 30 s t1 start time with t2 fixed at 60 s
Guard terminal performance <5% error at 500 kΩ parallel circuit resistance with 100 MΩ load
Resolution 0.1 kΩ
Short circuit / charge current 2 mA +0% -50% (IEC61557-2)
Terminal voltage accuracy -0% +2% ±2 V
Test current 1 mA at min. pass value of insulation to a max. of 2 mA max
Operation range 0.10 MΩ to 1.0 GΩ (IEC61557-2)
Leakage current display 0.1 µA resolution 10% (±3 digits)
Voltage display ±3% ±2 digits ±0.5% of rated voltage
NOTE: Above specifications only apply when high quality silicone leads are being used - as supplied with the
instrument.
Continuity
Measurement 0.01 Ω to 1 MΩ (0 to 1000 kΩ analogue scale)
Accuracy ±3 % ±2 digits (0 to 99.9 Ω ) ±5% ± 2 digits (100 Ω - 500 kΩ)
Service Error: IEC61557-4
Test current 200 mA (–0 mA +20 mA) (0.01 Ω - 4 Ω)
Polarity Single polarity (Default) Dual polarity (configurable on setup)
Lead resistance Null up to 9 Ω
Capacitance
Range 0.1 nF - 1 mF accuracy ±5.0% ±2 digits (1 nF - 10 μF)
Accuracy (1 nF - 10 μF): ±5.0% ±2 digits
Voltmeter
Range dc: 0 - 1000 Vac: 10 mV - 1000 V TRMS sinusoidal (15 Hz - 400 Hz)
Accuracy dc: ±2% ±2 digits (0 - 1000 V),
ac: ±2% ±2 digits (10 mV - 1000 V TRMS) ,
Operational Uncertainty: IEC61557-1
Frequency range 15 - 400 Hz (0 - 1000 V)
Frequency resolution 0.1 Hz
Frequency accuracy ±0.5% (±1 digit)
Diode test accuracy: ±2% ±2 digits 0.01 V to 3.00 V
Display range: 0.00 V to 3.00 V
Specifications
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