129506 2012-12
16
KFU8-DW-1.D
Operation
Very low signal frequencies, displayed value is not valid,
message
During the measurement of very low signal frequencies, the
measuring system has detected that the signal has fallen below the
last computed frequency. The time between the last two signal edges
has already elapsed. The device is now waiting for the next positive
signal edge in order to compute the next measured value. Here, 'XXX'
represents the positions of the first three digits of the last measured
value.
Self test, message
When the power supply is switched on, the device performs a self
test. The message appears when it is established that there is an
error, for example during the check summation of the EEPROM data;
in this state, the output relay behaves as if there has been a power
failure. The error message can be cleared by switching the supply
voltage off and on again.
Note!
Select a wider measurement range.
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