HT Instruments HT4020 Manual De Instrucciones página 51

6. Press the
7. Disconnect the test lead and the symbol "2PH" appears on the secondary display
8. Connect the test lead to the L2 phase conductor (see Fig. 13 – right part)
9. When an input voltage >80V is detected the buzzer sounds and the symbol "PH" is
shown on the main display. Don't press any key and keep the test lead connected to L2
phase cable.
10. After about one second "MEASURING" appears on the display indicating that the
instrument is ready to execute the second measurement.
11. Press the
12. If the two tested phases follow the correct sequence, the instrument displays "1.2.3.",
otherwise it displays "2.1.3." indicating an incorrect phase sequence.
1.800.561.8187
FUNC key, the "MEASURING" message will disappear.
If the input voltage value is < 80V the instrument doesn't show "PH" symbol
and it's not possible to execute the phase rotation detection
FUNC key, the "MEASURING" message will disappear.
If you Wait more than 10 seconds between the first
the second, the instrument will display the "SEC" message and it's
necessary to repeat all the measurements from the beginning. Rotate the
selector to any position to escape the function and restart at step 1.

The detected voltage is NOT the phase to neutral voltage, but the
voltage between the conductor and the operator who is holding the
instrument. This value can be lower than the phase to neutral voltage.
DON'T TOUCH THE PHASE CABLE IF YOU AREN'T SURE THAT
ANY VOLTAGE IS PRESENT

If the operator is insulated from the ground (e.g. insulated floors, shoes
with thick rubber, etc.) the instrument may not measure correctly. We
recommend repeating test at least twice due to verify the rightness of the
obtained result
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CAUTION
CAUTION
CAUTION
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FUNC key press and