HT instruments М75 - Manual (Page 21)

M72 - M73 - M74 - M75
EN - 19
CAUTION
During measurement:
 GO must be always kept pressed or its surface must be always touched
(only for mode 1W)
 The test probe, except for the phase cable under test, must not be in touch
or close to any voltage source which may block the measurement due to
the instrument’s sensitivity
 The test probe must be kept in touch with the phase cable.
15. At the end of the test, if two tested
cables are in a correct phase sequenze,
the instrument emits a double sound to
signal the positive outcome of the test
and displays a screen like this
Correct phase
sequence
Phase rotation
16. At the end of the test, if two cables
belong to the same phase, the
instrument emits a double sound to
sigla the positive outcome of the test
and displays a screen like this
Cables belonging to
the same phase
Compliance between
one cable and
another
17. At the end of the test, if two tested
cables are not in the correct phase
sequenze, the instrument emits a
prolonged sound to signal the negative
outcome of the test and displays a
screen like this
Wrong phase
sequence
Phase rotation
18. To perform a new measurement press GO, then re-start from point 6
CAUTION
Although two cables are in sequence it doesn’t mean that the third cable is in
sequence too. It’s not excluded that the cabling was made by mistake with a
double phase cable. To clear any possible doubt always perform at least two
measurements by testing the cables two by two.