HT7
EN - 7
4.5. AC VOLTAGE MEASUREMENT
CAUTION
The maximum input for AC voltage is 690V. Do not measure higher
voltages to avoid risks of electrical shocks or serious damages to the
instrument.
symbol is lighted up whenever the voltage between the probes
exceeds 50V, even if the batteries are low or have been removed.
Fig. 3: AC voltage measurement
1. Perform the preliminary Autotest (see § 4.3)
2. Connect the L1 and L2 probes to the object
under test (see Fig. 3). The measurement is
performed
only when probes are in contact
to live conductors
.
3. The instrument turns automatically on and the
measured AC voltage value is displayed both
in numerical and bargraph modes. AC symbol
is displayed. Always keep the instrument in
vertical position for an optimal display
reading.
4. The symbol
is lighted up for AC voltage
measurements from 100V to 690V, 50/60Hz.
5. The instrument turns automatically off as
soon as the probes are disconnected from the
object under test. If the measured voltage is
lower than 3.0V AC the instrument turns
automatically off.
6. While taking measurements in single-phase
installations, the symbols
or
can be
displayed. This is not a malfunction.
7. Press the
key to switch on the white LED
illuminator to perform measurements in dark
environments.
