CEM SMART System 5 Operation Manual page 152

Troubleshooting Guide
Symptom
Balance Over Load
Error
Balance Under Load
Error
Thermal Overload
Error
Fuses Blow
Balance Error
Instrument Will Not
Calibrate
Unstable Balance
Readings
Balance Displays
Incorrect Weight
IR Reads Negative
Number(s)
Instrument Top Cover
Difficult to Close or
Noisy when Opened
Garbled Display
Intermittent "clicking"
when Microwaves On
Possible Cause/Remedy
Weight on balance is too large to be recognized
by balance.
Weight on balance is too small to be recognized
by balance.
Ensure that instrument cover is closed properly.
Ensure that switches on all three interlocks are
adjusted properly.
Check dual voltage supply and fuses (10A fuses
for 60 Hz and 5A for 50 Hz) and correct dual
voltage supply and/or replace fuses, if required.
Balance stem not installed. Turn instrument off,
install balance stem and turn instrument on.
Ensure that instrument is located on a stable work
surface.
Balance cable not installed. Properly install cable.
Balance not calibrated. Perform calibration using
10g or 50g weight.
Instrument turned on before balance stem and pan
were installed. Turn instrument off, install stem
and pan, and turn instrument on.
Faulty balance. Contact CEM Service.
Faulty balance. Contact CEM Service.
Faulty IR sensor. Contact CEM Service.
Gas spring installed improperly or faulty gas
spring. Contact CEM Service.
Cold start instrument. Contact CEM Service.
Arcing at microwave waveguide slot. Contact
CEM Service.
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