HT instruments М75 - Manual (Page 31)

M72 - M73 - M74 - M75
EN - 29
CAUTION
The message “Measuring” on the display means that the instrument is
measuring or discharging eventual capacitors. During this phase never
disconnect nor touch test leads.
8. At the end of the test, before giving the result of the measurement, the instrument
automatically discharge eventual capacitors and parasite capacitances present
among the conductors involved in the measurement
9. At the end of the test, if the resistance
value is higher than the minimum limit
threshold (see § 4.5), the instrument
emits a double sound to signal the
positive outcome of the test. A screen
similar to this is displayed
Resistance value
Test voltage value
10. At the end of the test, if the resistance
value is higher than 999M , so higher
than the full scale, the instrument emits
a double sound to signal the positive
outcome of the test. A screen similar to
this is displayed. Note! An insulation
value higher than 999M
 is an excellent
insulation value, generally much higher
than the minimum requirements
prescribed by Standards
Resistance value
Test voltage value
11. At the end of the test, if the resistance
value is lower than the minimum limit
threshold (see § 4.5) the instrument
emits a prolonged sound to signal the
negative outcome of the test. A screen
similar to this is displayed
Resistance value
Test voltage value
4.13.1. Anomalous cases which may occur during M  tests
If, during measurement, the voltage
present at terminals is higher than 10V
the instrument does not perform the test
and emits a prolonged sound to signal
the anomalous situation. The screen
beside is displayed for 5 seconds after
which the instrument displays the default
screen related to the M
 test
Input voltage value