After
switching on
the device,
The version of the device is briefly displayed at the LCD
before the ready state is displayed.
Testing is started
by means of
briefly pressing
the Test button, whereas the LCD is
cleared . As a result, the test voltage rises with 1000V/s and is permanently displayed
at the LCD. If the Test button was pressed once again, testing would be cancelled
. If the Test button is not pressed again, the test current monitoring system records the
response of the device under test, switches off the test voltage and stores the response value and
type of response in the LCD:
Characterises the measurement result 400V as the 1mA reference value of a varistor,
Zener diode, Transzorb diode, etc. or at a resistor.
Indicates that the measured value 230V is the sparkover voltage of a gas discharge
tube or a spark gap, etc.
Indicates that the testing range was exceeded due to a higher sparkover voltage of the
device under test or due to an interruption of the test circuit.
In order to evaluate a measurement result, it has to be compared with the relevant reference lists
in these instructions or with the manufacturer instructions, whereas the type of response (VR or
GA) is irrelevant.
Attention!
Keeping the Test button pressed extends the test period, i.e. as long as the Test button
is pressed, the test voltage remains switched on and is displayed permanently at the LCD.
-
Using a varistor, Zener diode, etc. or resistor, involves that the test current is kept constant
at 1 mA after the device under test has responded.
-
If a gas discharge tube or a spark gap, etc. is used, a glow potential occurs after the device
under test has responded which is, however, undefined and puts unnecessary strain on the
device under test. After the Test button is released, the recorded response value is displayed
again.
If is displayed during testing or if low BATT remains displayed after switching on the
tester, this message corresponds to the
Low battery indication
, i.e. in order to continue testing,
the battery has to be replaced or the accumulator has to be recharged or the power supply unit
included in delivery has to be used for external power supply.
Before
replacing the battery
, the device has to be switched off and all cables have to be unplugged.
Some types of batteries do not provide sufficient energy in order to generate the adequate test
voltage. Preferably batteries of the alcaline type are to be used.
The battery compartment at the rear side of the device can be opened using your finger nail or a
screw driver. Remove the discharged battery, fix the new 9V battery at the clip and close the battery
compartment.
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PM20 v1
V
V
xxxxV
brk xxxV
VR 400V
GA 230 V
> 1100 V
low BATT
