45
UMG 96RM
Mains frequency (addr. 034)
A voltage L-N of greater than 10V effective voltage must
be present on at least one of the voltage measurement
inputs in order that the mains frequency can be detected
automatically.
The mains frequency is then used to calculate the
sampling rate for the current and voltage inputs.
If there is no measurement voltage, the mains frequency
cannot be determined and thus no sampling rate can be
calculated. The acknowledgeable error message “500”
appears.
The voltage, current and all other resulting values
are calculated based on the previous frequency
measurement and possible cable-connecting sockets
and continue to be displayed. However, these derived
measured values are no longer subject to the specified
accuracy.
If it is possible to re-measure the frequency, then the
error message will disappear automatically after a
period of approx. 5 seconds once the voltage has been
restored.
The error is not displayed if a fixed frequency has been
configured.
Adjustment range: 0, 45 .. 65
0 = automatic frequency determination.
The mains frequency is determined from
the measurement voltage.
45..65 = fixed frequency
The mains frequency is preselected.
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