Operation Manual

18
RESISTANCE.
To measure the resistance, the tester measures the voltage over the
resistance when a known current flows through it and calculates the
resistance; therefor it is important to make measurements only with the
power switched OFF.
To reduce measuring-errors, caused by parallel resistors, it is advisable
to remove the resistor from the circuit and not to touch the metal part of
the test leads and/or resistor.
1. Connect the red test lead to the V/
Ω
input jack and the black test lead to the COM
jack.
2. Set the rotary switch to the desired
Ω
position.
3. Connect the test leads to the resistor.
4. Read the resistance value on the display.
In case the testleads are shortcut in the position 200M
Ω
, the display still indicates 1.0M
Ω
.
This value must be subtracted from the actual measured value.
DIODE.
When testing a diode, the LCD readout will show 1... (overload) when the
diode is in back-direction; when the diode is in conductive-direction,
then the meter readout will show the threshold value.
The same rules as described by "RESISTANCE" are applicable for the
diode measurements.
1. Connect the red test lead to the V/
Ω
input jack and the black test lead to the COM
jack.
2. Set the rotary switch to the position.
3. Connect the test leads to the diode.
Be aware that the meter only shows whether the diode conducts or blocks; there is no
indication concerning the quality of the diode.