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3.2.1 Start testing
Note
Push ‘ENTER’ button to
save the set test voltage
and return to READY
mode (see note 1).
Connect test
probes to the
test object.
Tips
Note
3.2.1.1 Operation procedures
1. Do not let the tester probes come into contact with each other, and do not place other objects on the probes so that
measuring errors can be avoided.
2. Before use, please make sure that the tester probes are clean; a smeared probe will adversely affect the measurement:
insulation resistance will not be stable, and for certain objects, measured values will not be consistent.
3. The capacitance and resistance of the object being tested might be low initially, and then increase gradually, and finally be
stabilized.
4. If resistance of the object being tested decreases abruptly or the test probes are short-circuited during the measurement,
the tester might stop generating test voltage.
5. Insulation resistance measurement cannot be started under the following circumstances:
1) When the set value of test voltage is flashing, which indicates that the tester is under the setup mode;
2) When ‘HOLD’ symbol is flashing;
3) When ‘TC’ symbol is displayed, and the reading for actual measured temperature is ---;
4) When an error message is displayed.
Push down ‘MEASURE’
button and hold it > 1 s to
start test, and the flash
symbol and the backlight of
‘MEASURE’ button start
flashing.
In case the readings are
not stable, please push
‘AVERAGE’ button to
display averaged values.
The measured resistance
and the actual output
voltage are displayed on
screen (see note 2).
Warning
1. Dangerous voltages might be generated at the test terminals during insulation resistance measurements, and therefore
please do not touch the terminals or test probes in order to avoid electric shock.
2. Please do not touch the object that is being tested or disconnect the test probes before auto discharging is completed,
otherwise electric shock might occur.
3. Even if power on/off button is never pressed, the battery power of the tester might still be exhausted due to other reasons,
such as battery leakage; under this situation, auto-discharging function might be invalid, and therefore please use a
discharging rod to discharge the test object.
1. In order to avoid damaging the equipment that is to be tested, please check the test voltage before measurement.
2. For repeating a test, please press ‘ ’button prior to the next measurement and check the test voltage.
3. In order to avoid damaging the tester during discharging, do not measure the insulation resistance between the two
terminals of a capacitor (greater than 4
μ
F).
4. In order to avoid damaging the tester, please do not directly connect the red tester probe to the blue probe.
Gently touch ‘ ’button
and set test voltage, and
the set voltage will flash.
Use‘ ’,‘ ’button to roughly
adjust the set test voltage, and use
‘CLOCK’, ‘TIMER’ button for fine
adjustment.
Push ‘SELECT’ button
to toggle between
resistance and leak
current.
Note 1: When flashing readings change to a constant one, it indicates that test voltage is successfully set.
Note 2:
1) If ‘>’ symbol starts to flash, it indicates that the measured value is too large and exceeds the measuring range.
2) During the measurement, ‘SET’ symbol will not be displayed, and voltage indication will change from readings of test
voltage to readings of actual output voltages which are about 5% higher than the set voltage.
3) In order to check the test voltage during the measurement, please press ‘ ’button, and value of the set voltage will be
displayed for about 2 seconds.
4) If the output voltage is lower than the set voltage during the measurement, the voltage readings will start to flash.
5) The elapsed time since the start of the measurement is displayed under the resistance readings; if the timer is set, the
remaining time will be displayed at the same position.
6) If the readings are not stable, you can use the measurement average function as follows: press ‘AVERAGE’ button to
activate/deactivate AVERAGE function; after ‘AVE’ symbol is displayed, the readings will be updated every 4 seconds;
however, the readings will still be updated every 1 second under the following situations: within the first 15 seconds after
the start of measurement; within the first 5-10 seconds after the measuring range is changed.