zenitech 161087, Instruction Manual

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5.2. Measuring direct current
Warning - Check the fuse before proceeding in order to avoid damaging the device or the
circuit to be measured. Be sure to use proper input jack, function, and measuring range.
Proceed as following to measure direct current:
1. Power off the circuit and plug the red cable into the «VΩmA» input jack, and the black cable into
the «COM» input jack.
2. Place the turning knob on the desired A range. In case of doubt on the proper range to select,
always start with the greatest range and lower it step by step until finding the proper range. Press the
ends of the test leads onto the desired circuit spots to measure the voltage (in serial).
3. Power on the circuit and read the measured value on the screen.
Note :
1. The direct current measuring needs to be done in serial, not in parallel, in order to avoid any
injuries and damaging the device.
2. While measuring direct current, if the test leads connected to the circuit are reversed, the screen will
show a negative value without altering its accuracy. For the 10A range, measure continuously for 15
seconds maximum every 10 minutes.
5.3. Measuring resistance
Warning - In order to avoid damaging the multimeter or the circuit to be measured, power off
all power sources of the circuit and completely discharge all the capacitors before proceeding to the
measure.
Proceed as following to measure resistance :
1. Plug the red cable into the «VΩmA» input jack, and the black cable into the «COM» input jack.
2. Place the turning knob on the desired Ω range. In case of doubt on the proper range to select,
always start with the greatest range and lower it step by step until finding the proper range. Press the
ends of the test leads onto the desired circuit spots.
3. The LCD screen displays the value of the measured resistance.
Note :
1. While measuring a low resistance, first short-circuit the two test leads to obtain the multimeter own
resistance and then substract it to the value of the measured value of the circuit resistance.
2. While measuring a high resistance, wait few seconds for the measured value to be accurate.
5.4. Diode test
Warning - In order to avoid damaging the multimeter or the circuit to be measured, power off
all power sources of the circuit and completely discharge all the capacitors before procceding to the
measure.
Proceed as following to measure a diode :
1. Plug the red cable onto the «VΩmA» input jack and the black cable into the «COM» input jack.
2. Place the turning knob on the range.
4.2.4 Resistance
Measuring
range
Resolution Accuracy
200 Ω 0,1 Ω ± 1,0 % of measured value + 5 digits
2 kΩ 1 Ω
± 1,0 % of measured value + 3 digits 20 kΩ 10 Ω
200 kΩ 100 Ω
2 MΩ 1 kΩ ± 1,5 % of measured value + 3 digits
4.2.5 Diode
Function Description Test condition
Display read approximately
forward voltage of diode
Forward DC current
approx. 0.6mA
Reversed DC voltage
approx. 1.8V
Built-in buzzer sounds if
resistance is less than 50Ω
Open circuit voltage
approx. 1.8V
5. Measures
5.1. Measuring AC or DC voltage
Warning
1. In order to avoid electrical shock and damaging the device, do not measure voltage greater than
600 V or V~ rms.
2. In order to avoid electrical shock and damaging the device, do not apply voltage greater than
600 V or V~ rms between the multimeter and earth.
3. Do not measure AC or DC voltage if a motor plugged into the circuit needs to be powered off or
powered on as power surge can occur and damage the device.
Proceed as following to measure voltage:
1. Plug the red cable onto the «VΩmA» input jack and the black cable into the «COM» input jack.
2. Place the turning knob on the desired V or V~ range. In case of doubt on the proper range to
select, always start with the greatest range and lower it step by step until finding the proper range.
Press the ends of the test leads onto the desired circuit spots to measure the voltage (in parallel).
3. The LCD screen displays the measured value. While measuring DC voltage, the screen also
displays thevoltage polarity.
Overload protection:
F0.5A/500V fuse
Overload protection:
F0.5A/500V fuse