38 Gossen Metrawatt GmbH
• One of the two protective contacts is not connected:
This is checked automatically during testing for touch current
U
IN
. Poor contact resistance at one of the contacts leads to
one of the following displays depending upon poling of the
plug:
– Display at the connection pictograph:
PE interrupted (x), or underlying protec-
tive conductor bar interrupted with refer-
ence to the keys at the test plug
Cause:
Voltage measuring path interrupted
Consequence: measurement is disabled
– Display at the connection pictograph:
Top protective conductor bar interrupted
with reference to the keys at the test plug
Cause: current measuring path interrupted
Result: no measured value display
See “LED Indications, Mains Connections and Potential
Differences” on page 17.
Reversal of N and PE in a system without RCCBs cannot
be detected and is not indicated by the instrument.
In a system including an RCCB, the RCCB is tripped
during touch voltage measurement without RCCB trip-
ping (automatic Z
L-N
measurement), insofar as N and PE
are reversed.
10.6 Help Function
The following information can be displayed for each switch posi-
tion and basic function after it has been selected with the rotary
selector switch:
• Wiring diagram
• Measuring range
• Nominal range of use as well as measuring and intrinsic
uncertainties
• Nominal value
➭ Press the HELP key in order to query online help.
➭ If several pages of help are available for the respective mea-
suring function, the HELP key must be pressed repeatedly.
➭ Press the ESC key in order to exit online help.
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