HT instruments HT39 - Manual (Page 11)

HT37 - HT39
EN - 10
4.3. MEASUREMENTS
4.3.1. DC Voltage measurement
CAUTION
Maximum input for DC voltage is 1000V. Do not attempt to take any voltage
measurement that exceeds the limits. Exceeding the limits could cause
electrical shock and damage the multimeter.
Fig. 3: DC Voltage measurement
1. Turn the selector on V.
2. Insert the test leads into the jacks, the red plug into
HzV
ΩµA jack and the black plug
into COM jack (Fig. 3).
3. Connect the red and black test leads to the positive and negative poles of the circuit
under test respectively. The voltage value will be displayed with automatic detection of
the range.
4. Press RANGE key to activate the manual mode; the “AUTO” symbol disappears from
display. Press cyclically RANGE to change the position of the decimal point on the
display. To activate the Autorange function keep pressed RANGE for at least 1 second.
5. The message "OL" means that the voltage exceeds the measuring limits. In this case
disconnect the test leads from the circuit under test to avoid damaging the instrument
or endanger your own safety.
6. The symbol "-" on the display means that voltage has opposite direction than shown in
Fig. 3.
7. For minimum and maximum value measurement, HOLD and Relative
∆REL functions
please refer to paragraph 4.2.