HT instruments М75 - Manual (Page 26)

M72 - M73 - M74 - M75
EN - 24
4.12.  0.2A: CONTINUITY TEST ON EARTH CONDUCTORS (M72, M74, M75)
The measurement is performed with a test current >200 mA (R<5Ω) and open circuit
voltage ranging from 4 to 24V DC according to IEC/EN61557-2 and VDE 0413 part 4.
CAUTION
Before performing the continuity test make sure that no voltage is present at the
ends of the conductor under test.
Fig. 9: Connection of the instrument’s terminals during test
1. Turn on the instrument
2. Press the arrow keys to select 0.2A
3. Insert the black and green cables in the corresponding input terminals of the
instrument
4. If the cable length is not sufficient to perform the test, extend the black one
5. If necessary insert the croco clips on the test probes
6. If the measuring cables being used have not been calibrated, first calibrate them as
described in § 4.12.1
7. Connect the instrument’s terminals to the ends of the conductor on which the
continuità test must be performed (see Fig. 9)
8. Press GO to perform the measurement
CAUTION
The message “Measuring” on the display means that the instrument is
measuring. During this phase never disconnect test leads. Connect the
instrument just BEFORE measuring and do not change connections while the
message “Measuring” is present on the display