HT Instruments HT7 Bedienungsanleitung Seite 28

5.4. 1-WIRE AC VOLTAGE DETECTION (POLARITY)
• 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.
• The 1-wire AC voltage mode should be used as a quick voltage
detection test with no voltage value displaying.
•
exceeds 110V, even if the batteries are low or have been removed
• The single-wire test is not suitable to measure voltage. For this purpose,
the two-wire voltage testing is necessary
1. Perform the preliminary Autotest (see § 4.3).
2. Connect the L2 probe to the object under test (see Fig. 5). The measurement is
performed only when probe is in contact to live conductors.
symbol and the "- - -" indication are shown on the display for AC voltage
3. The
detected from 150V to 690V, 50/60Hz
4. The instrument turns automatically off as soon as the measured voltage is lower than
100V AC.
5. Press the key to switch on the white LED illuminator to perform measurements in
dark environments.
symbol is lighted up whenever the voltage between the probes
Fig. 5: 1-wire AC Voltage detection
CAUTION
EN - 9
HT7