Auto: Automatic Cycle Of Measurements To Test A Plant (M74, M75) - HT MULTITEST M72 User Manual

4.12. AUTO: AUTOMATIC CYCLE OF MEASUREMENTS TO TEST A PLANT (M74,
M75)
This function permits to test an electrical plant in a completely automatic way without any
intervention of the operator.
Testing an RCD involves the tripping of the RCD itself. Therefore, before taking
this measurement, make sure that no loads are connected to the RCD under
test to avoid damaging them. Disconnect all loads connected to the RCD as
they could add further leakage currents to those moved by the instrument, thus
nullifying the test results.
Fig. 13: Connection of the instrument's terminals during AUTO test
1. Turn on the instrument
2. Press the arrow keys to select AUTO
By pressing MODE select the test current among the possible values 30mA,
MODE
3.
30mA x5, 100mA, 300mA which turn cyclically at each key pressure
PEAK
Pay attention when setting the test current of the RCD to make sure that the
correct one is selected. In case a higher current than the nominal one of the
device under test is selected, the RCD would be tested at a higher current
than the correct one, thus favouring a quicker tripping of the RCD itself.
4. Insert the black and green cables in the corresponding input terminals of the
instrument. If necessary insert the alligator clips on the test probes or use the shuko
cable
5. Connect the green cable to the protective conductor (earth) and the black cable to the phase
conductor (Fig. 13) or insert the Shuko cable in a power socket
Keep GO pressed for at least one second, the instrument performs
measurements without any intervention of the operator in the following
6.
GO
sequenze: Ra
CAUTION
CAUTION
(15mA), RCD, MΩ (phase to earth)
EN - 37
MULTITEST M72 - M73 - M74 - M75