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9 Service
76
a Precisa service engineer.
Fault
Possible causes
Weight display
does not light
up
• Instrument is not switched on
• Mains cord is not plugged in
• Mains fuse is faulty
"OL" is
displayed
• The weight range has been exceeded (observe
the information on the maximum weight range)
"UL" is
displayed
• The weight range is below the range of the
instrument (weighing pan or pan holder
missing)
The weight
display
changes
continuously
• The draft is too strong at the location of the
instrument
• The instrument support is vibrating or
fluctuating
• The weighing pan is touching a foreign body
• The sample is absorbing moisture
• The sample is evaporating/vaporising/subliming
• Sharp changes in temperature in the sample
Results of
weighing are
clearly
incorrect
• The instrument has not been correctly tared
• The instrument has not been correctly levelled
• The calibration is no longer correct
• Sharp temperature fluctuations occur
Configuration
menu cannot
be changed
• The password lock is activated in the
configuration menu
The display
flashes
continuously
during
calibration
• The instrument location is not quiet enough
(interrupt calibration with «
ON/OFF
» and move
the balance to a better location).
• Use of a calibration weight which is too
imprecise (only applies to external calibration)
The connected
printer won't
work
• The printer is not switched on
• The data cable is faulty or not connected
• The interface settings do not match the
moisture analyser