COMBI521
EN - 34
CAUTION
Disconnect any cable not strictly involved in measurement.
Before connecting the test leads, make sure that there is no voltage at the
ends of the conductors to be tested.
5. Connect the test leads and remote switch probe to the ends of the conductors to be tested
as shown in Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, or Fig. 16.
6. Press the
GO/STOP
key on the instrument or the
START
key on the remote switch
probe. The instrument will start the measurement.
CAUTION
If message “
Measuring…
” appears on the display, the instrument is
performing measurement. During this whole stage, do not disconnect the
test leads of the instrument from the conductors under test, as the circuit being
tested could remain charged with a dangerous voltage due to the stray
capacitances of the system.
7. Regardless of the operating mode selected, the instrument, at the end of each test,
applies a resistance to the output leads to discharge the stray capacitances in the
circuit.
8. At the end of measurement (fixed duration of 3s), the
instrument shows on the display the message "
OK
" in
case of a positive result (value higher than the set
minimum limit threshold) or "
NOT OK
" in case of a
negative result (value lower than the minimum limit
threshold set). The message "
>999M
" indicates the
instrument’s out of scale, which normally appears to be
the best possible result.
M
15/10 – 18:04
R
V t
T
>
=
=
9 9 9 M
5 1 2 V
3 s
O K
MAN 500V 1.00M
L-PE
MODE
Vtest Lim. FUNC
9. Press the
SAVE
key to store the test result in the instrument’s memory (see § 7.1) or
the
ESC/MENU
key to exit the screen without saving and go back to the main
measuring screen.
