Operation Manual

30
Automatic measurement up to 10 Ω
Tests with 200 mA and automatic polarity change
according to EN/IEC 61557-4
.
Attention!
First switch on the METRAOHM 413 and af-
terwards contact the measuring point with
the test electrode. Button
may not be
pressed thereby, otherwise the METRAOHM
413 can be damaged by external voltages.
1. Measurement setup:
 Connect the insulated 4 mm-connector of the
the measuring line to the socket of the
METRAOHM 413.
 Contact the reference earth with the test
electrode of the measuring line (e.g. by clamp).
2. Zero balancing:
The tester has to be switched o for zero
balancing.
Contact the test electrode of the METRAOHM 413
to the reference earth and ensure safe contact.
Press button
and then the button
at the
same time. The zero balance will be performed.
3. Select automatic measurement:
Hold button
+/-
pressed until POL +/- LEDs light
up quickly and “AuTo“ appears on the display.
4. Automatic measurement:
Shortly press button to start automatic
measurement. The pole changing is carried out
automatically.
5. Querying of stored measured values + / - :
Press button
+/-
to switch between the
measured resistance value with + polarity and
– polarity.
External voltage warning
Acoustic warning and red LED for interference vol-
tage from 15 V to 400 V (voltage is displayed in V)
Continuity signal
An acoustic signal sounds for 2 seconds during
measurement for resistance values < 2 Ω.