HQ Power DVM891 Notice D'emploi page 5

3. Operating instructions
a. Measuring DC Voltage
1. Connect the black test lead (-) to the "COM" jack and the red test lead (+) to the "VΩHz" jack.
2. Select the appropriate V
be tested.
3. The measured value and the polarity of the red test lead are displayed on the LCD.
Remark: Set the FUNCTION switch to the highest range and gradually work your way down if the voltage range is
unknown beforehand.
b. Measuring AC Voltage
1. Connect the black test lead (-) to the "COM" jack and the red test lead (+) to the "VΩHz" jack.
2. Select the appropriate V∼ range with the FUNCTION switch and connect the test leads to the source or load to
be tested.
3. The measured value appears on the LCD display.
Remark: Set the FUNCTION switch to the highest range and gradually work your way down if the voltage range is
unknown beforehand.
c. Measuring DC Current
1. Connect the black test lead (-) to the "COM" jack and the red test lead (+) to the "mA" jack for measurements of
max. 200mA. Move the red test lead to the "10A" jack for measurements of max. 20A (for max. 15 sec. at a
stretch).
2. Select the A range with the FUNCTION switch.
3. Connect the test leads IN SERIES with the load under measurement.
4. The polarity of the red test lead and the measured current are displayed on the LCD.
Remark: Set the FUNCTION switch to the highest range and gradually work your way down if the current range is
unknown beforehand.
d. Measuring AC Current
1. Connect the black test lead (-) to the "COM" jack and the red test lead (+) to the "mA" jack for measurements of
max. 200mA. Move the red test lead to the "10A" jack for measurements of max. 20A (for max. 15 sec. at a
stretch).
2. Select the A ∼ range with the FUNCTION switch.
3. Connect the test leads IN SERIES with the load under measurement.
4. The measured current is displayed on the LCD.
Remark: Set the FUNCTION switch to the highest range and gradually work your way down if the current range is
unknown beforehand.
e. Measuring Resistance
1. Connect the black test lead (-) to the "COM" jack and the red test lead (+) to the "VΩHz" jack.
2. Select the appropriate "Ω" range with the FUNCTION switch and connect the test leads with the load to be
measured.
DVM891_v2
range with the FUNCTION switch and connect the test leads to the source or load to
- 5 - HQ POWER