25
26
Note:
Do not measure AC power supply over 750Vac or DC power supply over
1000Vdc. It is possible to display higher voltage (10%), but it may damage the
tester.
Avoid electric shock when working with high voltage.
After completing all measurement operations, please disconnect the test
lead with the measured circuit, and remove the test lead from the input
terminal.
Black
Red
Capacitor
9.3.1.5 Comparison Measurement
Press “COMP” button under insulation resistance testing condition without high
voltage output. When the LCD shows “COMP”, it indicates the tester enters
comparison measurement mode. The default comparison resistance is 10M
Ω
,
the initial interface flashes at the unit of 10M
Ω
at a frequency of 1HZ, to indicate
the tester is in comparison resistance setting state. Press and to select
the digit and unit of comparison resistance to be changed, press
and to
adjust comparison resistance and unit, then press “ENTER” to save the parameter
setting or press “ESC” to cancel the parameter setting. After that, hold down
“TEST” for 2 seconds, if insulation resistance is less than comparison resistance,
the symbol “FAIL” will appear on the LCD, otherwise “PASS” appears.
To return to the continuous measurement interface, please press “COMP” in
“COMP” mode or press “ESC” twice consecutively.
9.3.2 Voltage Measurement
1) Connect red test lead with “LINE” input terminal, and black with “EARTH”.
2) Connect red and black alligator clips with measured circuit. For DC voltage
measurement, if the voltage of red test lead is negative, the negative symbol
“-” appears on the LCD.
Fig. 9.3.2.1 Wire connection of voltage measurement
Black
Red
As a part of insulation measurement, the tester has circuit capacitance measurement
function. When CAP/R button is pressed without high voltage output, the tester
enters capacitance measurement function by default, with output voltage at 250V
range. Under capacitance measurement function, there are only three voltage
ranges including 250V, 500V and 1000V, which can be switched by pressing ▲
and ▼. For capacitance measurement, the tester calculates the capacitance by
measuring the charge and voltage of measured circuit under charge.
9.3.3 Capacitance Measurement (UT512E)
Fig. 9.3.3.1 Wire connection of capacitance measurement
UT512D/E User Manual
UT512D/E User Manual
