Note: The voltmeter will continue to operate for voltages greater
than 100 V at 50 Hz. To replace the fuse, disconnect the test leads,
switch the instrument OFF and loosen the screws holding the
battery compartment cover in place. Remove the cover and replace
the fuse of the correct type and rating. Replace and re-secure the
battery compartment cover.
Follow the same procedure as for battery replacement
A replacement fuse must be of the correct type and rating:
i.e. 500 mA (FF) H.B.C.50 kA min 1000 V (32 mm x 6 mm)
Preventive maintenance
When necessary, the instrument can be cleaned with a damp cloth.
Do not use alcohol based cleaners.
Specification
All quoted accuracies are at +20 °C.
Insulation
Nominal test voltages for MIT415:
10 V, 25 V, 50 V, 100 V, 250 V, 500 V
Nominal test voltages for MIT417:
10 V, 25 V, 50 V, 100 V, 250 V, 500 V,
1000 V
Range full scale accuracy
All ranges ±2% ±2 digits up to 100 MΩ.
Then:
1000 volts. ±3% ±2 digits per GΩ
500 volts. ±3% ±2 digits ±0.4% per GΩ
250 volts. ±3% ±2 digits ±0.8% per GΩ
100 volts. ±3% ±2 digits ±2.0% per GΩ
50 volts. ±3% ±2 digits ±4.0% per GΩ
25 volts. ±3% ±2 digits ±8% per GΩ
10 volts. ±3% ±2 digits ±20% per GΩ
Analogue range: 1 GΩ full scale
Short circuit current: 2 mA +0% -50%
Terminal voltage: -0% +20% ±1 V (Ii <1 mA)
Test current on load:
1 mA at min. pass value of insulation specified in BS7671,
HD384 and IEC364, EN61152-2, 2 mA max.
EN61557 operating range: 0,10 MΩ to 1,00 GΩ
Leakage current range: 10 µA to 2000 µA
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