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5.4 Resistance Measurement
WARNING:
To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before
taking any resistance measurements. Remove the batteries and unplug the line cords.
1) Set the rotary switch to the desired resistance range.
2) Insert the black test lead banana plug into the negative COM jack, insert the red test lead banana
plug into the positive V mA jack.
3) Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of
the part under test so the rest of the circuit will not interfere with the resistance reading.
4) Check the reading on the LCD display.
NOTE:
● The measured value of a resistor in a circuit usually is different from the rated value of resistor, it
because the test current of the meter flows through all possible paths between the probe tips.
● In order to ensure the best accuracy in measurement of low resistance, short the test leads before
the measurement and subtract this resistance value of the test leads.
● For high resistance measurement, the meter may take a few seconds to stabilize the readings.
● In the open circuit, the meter display OL to indicate the over range
5.5 Square Wave Output
1) Set the rotary switch to
2) Insert the black test lead banana plug into the negative COM jack, insert the red test lead banana
plug into the positive V mA jack.
The meter output square wave: frequency = 50Hz
3)
560KΩ, the LCD display is insignificance.
range position.
32
, Vp-p =
±10Hz
5V±2V
, output impedance =
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