16
PM5A2
8. Other Functions
8.1. Backlight
The equipment display has a backlight. To activate it, press
key. After 10 seconds the backlight will turn off. To
reactivate it, press
key again.
8.2. Filter
When insulation measurements are carried out in transformers or in large dimension machines in presence of
strong electromagnetic fields, it is possible for the equipment reading to be unstable, especially for resistance
values higher than 100
MΩ. In these cases it is convenient to press the
key before starting the measurement
activating the filter that allows for the reaching of the insulation resistance value in an upward curve without
significant oscillation.
8.3. True RMS AC/DC Voltmeter
In order to use this function, connect the test points and turn on the unit. The measured value will be exhibited
automatically in the display.
AC
DC
10V up to
1000Vr.m.s.
10V up to 1000V
Precision: ± (5% of the r 3 digits)
8.4. Leakage current measurement
During the tests, the equipment measures and displays the leakage current value within a range of 1 nA up to
3 mA, with a precision of ± (10% of the r 3 digits).
8.5. Capacitance Measurement
The capacitance value is obtained by measuring the insulation resistance. After finishing measuring (When the
key has been pressed), wait until the high voltage LED turns off, and press the
key and the capacitance value
will be exhibited on the display.
Voltage
Capacitance
500V
50nF up to 10µF
1,000V
50nF up to 5µF
2,500V
30nF up to 2µF
5,000V
30nF up to 1µF
Precision: ± 10% of the measured value ± 3 digits
Note
: “
0
” will be exhibited on the display when measuring values lower than 50nF
