Phase Sequence Indication - Ht Instruments Ht10 Bedienungsanleitung

5.6. PHASE SEQUENCE INDICATION

•
The maximum input for AC voltage is 1000V. Do not
try to measure higher voltages to avoid risk of
electrical shocks or serious damages to the instrument
•
Warning LED turns ON and the buzzer sound for
voltage between probes over 50V
1. Perform the preliminary Autotest function (see § 5.1)
2. Connect L1 probe on L1 phase and L2 probe on L2 phase of the
three-phase system under test (see Fig. 8). The measurement is
performed only with contact of probes directly on metal parts of
conductors
3. The LED and the "AC"indication switch on, the AC voltage
measurement is displayed and an acoustic signal is emitted
4. The symbol (clockwise) is displayed in case of correct phase
sequence indication. The
in case of incorrect phase sequence indication
5. Connect L1 probe on L2 phase and L2 probe on L3 phase of the
three-phase system under test.
displayed in case of correct phase sequence indication. The
symbol (anticlockwise) is displayed in case of incorrect phase
sequence indication
6. Connect L1 probe on L3 phase and L2 probe on L1 phase of
three-phase system under test.
displayed in case of correct phase sequence indication. The
symbol (anticlockwise) is displayed in case of incorrect phase
sequence indication
7. Press the H/ key to activate/deactivate the HOLD function at
display. Press
activate/deactivate the display backlight
8. Press the / key to activate/deactivate the white LED torch
34
CAUTION
symbol (anticlockwise) is displayed
The
The
and hold the H/
HT10
symbol (clockwise) is
symbol (clockwise) is
key in order to