Density Meter LB 444 SECTION 5. GETTING STARTED
51
Error Messages during Measurement
Message
Cause, Notes
Measurement halted
Measurement stopped via digital input
or
Measurement stopped because the countrate
threshold has been exceeded or not reached the
countrate threshold
Rate Overflow Countrate is > 520,000 (e.g. empty meas. path,
detector error).
Power Fail Complete failure or drop of power supply below
tolerance level
No Detector Rate *) Detector supplies no pulses for at least 60 s.
Wrong HV *)
HV reference voltage of a detector too high or too
low.
Measurement is aborted when this error occurs
and has to be restarted with the <
run
> button.
Measurement is not aborted. Relay “Failure” is
de-energized.
Error temperature meas-
urement
Temperature input faulty (see "Temperature
Compensation" and " Service Instructions").
Power failure
> 1 month *)
Enter New Date
After a long period of power failure you have to
check and, if necessary, correct the date to en-
sure correct decay compensation
Even if the date is correct, you have to enter one
digit of the year and confirm the input with <
en-
ter
>.
*) When these error messages are displayed, the measurement is stopped automatically
and must be restarted by pressing the <
run
> button
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