Prokit's Industries Pro's Kit MT-1280D, Руководство пользователя

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Notes:

In the measurement of DC 600mV and AC 6V, if there is reading
existing without connection to the test leads. In this case, reset the
meter to zero.

Within the AC voltage function, press "Select" to measure the
frequency of the AC voltage.

The value of the AC voltage measurement is True RMS (root mean
square) value. These measurements are accurate for sine wave and
other waves (without DC offset), square wave, triangular wave and
step wave.
3.2.2 Frequency Measurement at AC V position:
To avoid any electric shock and/or damage to the meter, do not
attempt a frequency measurement if the voltage is over DC
750V or AC 750V (the effective value).
The measurement is
suitable for measuring the power frequency less than 1kHz.

Turn the rotary switch to the position
～
V.

Press the "Select" key to select "Hz"
 Connect the black test lead and red test lead to COM socket and V
socket respectively.

Use test lead to measure the frequency of the circuit board.
 Read the frequency measured value on LCD screen.
3.2.3 Frequency and Duty Cycle Measurement at Hz/%
position:
To avoid any electric shock and/or damage to the meter, do
not attempt a frequency measurement if the voltage is over DC
250V or AC 250V (the effective value).
Frequency measurement at the Hz% position:
 Turn the switch to the position Hz%.
 Connect the black test lead and red test lead to COM socket and V
socket respectively.

Use test lead to measure the frequency of the circuit board.
 Read the frequency measured value on LCD screen.
 Press the "Select" to switch to "%", read the measured duty cycle
value on LCD screen.