HT7
EN - 10
5.5. PHASE SEQUENCE INDICATION
CAUTION
The maximum input for AC voltage is 440V. 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. 6: Phase sequence test
1. Perform the preliminary Autotest (see § 4.3).
2. Connect the L1 probe to phase 1 and the L2 probe to phase 2 of the three-phase
system under test (see Fig. 6). 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
.
4. AC symbol is displayed. LEDs
and
are lighted up for AC voltage
measurements from 180V to 440V, 50/60Hz
.
5.
symbol (clockwise) or
symbol (counterclockwise) are displayed according to
the phase sequence detected.
6. Connect the L1 probe to phase 2 and the L2 probe to phase 3 of the three-phase
system under test.
symbol (clockwise) and
symbol (counterclockwise) are
displayed according to the phase sequence detected.
7. Connect the L1 probe to phase 2 and the L2 probe to phase 3 of the three-phase
system under test.
symbol (clockwise) and
symbol (counterclockwise) are
displayed according to the phase sequence detected.
8. Press the key to switch on the white LED illuminator to perform measurements in
dark environments.
Summary of Contents for 1009740
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