HT instruments SIRIUS89N - Manual (Page 44)

SIRIUS89N
EN - 42
6.4.5. Measurement procedure and results of " R
A
" mode
1. Select R
A
mode by means of the F1 key.
2. Connect the Black, Green and Blue connectors of the three-terminal shuko cable or
of the split cables to the corresponding input terminals of the instrument
B1, B3, B4.
Instrument connection for P-PE test in a 230V
single-phase System
Instrument connection for P-PE in a 400V three-
phase system
Instrument connection for P-PE in a 400V three-phase system without neutral
3. Connect the shuko plug into a 230V 50Hz socket or the crocodiles to the
conductors of the three-phase system (see previous pictures).
4. If possible disconnect all low impedance loads downstream the point at which
the measurement is to be taken, as such impedance would be in parallel with
the line impedance to be measured.
5. The key F4 permits to select one of the following limit values for the contact
voltage (which can be shown cyclically when pressing the key):
50V (default)
25V.
6. Press the
START key once to execute a test with “0°” test current.
or
Press the START key twice to execute a test with “180°” test current.
CAUTION
The
R
A
measurement make flow a test current of 15mA. This may cause the
tripping of 10mA. If necessary effect the test upstream the switch. Never
disconnect the test leads when the message
"MEASURING" is displayed.
START
STOP