Pro'sKit MT-1220, Руководство пользователя

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Notes :

The measured value of the electric resistance of the circuit differs a
bit from the rated value of the electric resistance.

To ensure measurement accuracy, in attempting a low resistance
measurement, first put two pen-shaped meters in short circuit and
capture the resistance reading of these short circuits. Then subtract
the aforesaid reading from the measured resistance.

When the meter is in open circuit, the display unit will show "OL" that
indicates the measured value is over the measuring range.
3.2.3 Diode or Beep Continuity Test
To avoid the meter or the measured equipment from damage,
do not attempt a diode test unless the operator has already
cut off all power sources for the circuit to be measured and
fully discharged all high-voltage capacitors.
Diode test outside the circuit:

Turn the rotary switch to the position .

Connect the test leads in black and in red to COM input socket and
V/

input socket respectively.

Connect the test leads in black and in red to the positive and
negative poles of the diode to be tested respectively.

The meter displays the forward bias value of the diode to be tested.
If the polarity of the test lead is reversed, the meter will display "OL".
Steps for a continuity test:

Connect the test lead in black and test lead in red to COM input
socket and V/

input socket respectively.

Use another two ends of the test lead to measure the resistance of
the circuit to be measured. If the measured distance the beeper will
sound continuously, and the LED will be on.
3.2.4 hFE Measurement
To avoid any electric shock and/or damage to the meter, do
not attempt a frequency measurement if the voltage is over
36V for DC current or AC current (valid value).

Turn the rotary switch to the position hFE.

Check the transistor is NPN or PNP type, insert the emitter, base and
collector separately to the correct hole, the approximate value will be
displayed on LCD.