Electric Resistance Measurement; Diode Test - Prokit's Industries Pro's Kit MT-1280D User Manual

3.2.4 Electric Resistance Measurement:

To avoid any electric shock and/or damage to the meter, do
not attempt a resistance measurement before cutting off the
power of the circuit and discharging all the electricity.

Ohm is the unit of electric resistance ().

Turn the switch to the resistance position.

Connect the black test lead and red test lead to COM socket and V
socket respectively.

Use test lead to measure the resistance of the circuit board.

Read the resistance measured value on LCD screen.
Notes:

The measured value of the resistance is usually a bit different from
the rated value.

To ensure measurement accuracy, in attempting a low resistance
measurement, please deduct the difference of short circuit between
two test leads.

At 60M position, you have to wait a few seconds before the
reading to be stabilized which is normal for a high resistance
measurement.

When the meter is in open circuit, the display will show "OL" that
indicates the measured value is over the measuring range.

3.2.5 Diode Test:

To avoid any electric shock and/or damage to the meter, do
not attempt a diode measurement before cutting off the power
of the circuit and discharging all the electricity.

Turn the switch to the position

Connect the black test lead and red test lead to COM socket and V
socket respectively.

Use test lead to measure the diode.

If the polarity of the test leads is not corresponded while measuring
the diode, the LCD will show "OL".

A normal diode still produces a forward voltage drop of 0.5V to 0.8V;
the reverse bias voltage reading depend on the electric resistance
between the test leads.
.
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