145
Troubleshooting Guide
Symptom
Possible Cause/Remedy
Balance Over Load
Weight on balance is too large to be recognized
Error
by balance.
Balance Under Load
Weight on balance is too small to be recognized
Error
by balance.
Thermal Overload
Ensure that instrument cover is closed properly.
Error
Ensure that switches on all three interlocks are
adjusted properly.
Fuses Blow
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 Error
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 Will Not
Instrument turned on before balance stem and pan
Calibrate
were installed. Turn instrument off, install stem
and pan, and turn instrument on.
Unstable Balance
Faulty balance. Contact CEM Service.
Readings
Balance Displays
Faulty balance. Contact CEM Service.
Incorrect Weight
IR Reads Negative
Faulty IR sensor. Contact CEM Service.
Number(s)
Instrument Top Cover
Gas spring installed improperly or faulty gas
Difficult to Close or
spring. Contact CEM Service.
Noisy when Opened
Garbled Display
Cold start instrument. Contact CEM Service.
Intermittent “clicking”
Arcing at microwave waveguide slot. Contact
when Microwaves On
CEM Service.