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Troubleshooting
The most important principle in troubleshooting the SMART System
5
is to check
each component of the system separately and trace any malfunction to its source.
Verify each of these factors:
• Balance Calibration
• Microwave Power Measurement
• Standard Solution Test
• Analytical Method (verify analysis method) – If necessary, contact the CEM
Applications Department or the nearest subsidiary or distributor.
A qualified service technician, using standard troubleshooting techniques, should
be able to identify and resolve operational problems. If a problem persists, call the
CEM Service Department or the nearest subsidiary or distributor.
Troubleshooting Guide
Symptom
Possible Cause/Remedy
Instrument Inoperative
Ensure that instrument is properly connected to
power outlet and that the power switch is in the
“on” position. Check fuses and replace if
necessary.
Balance Will Not Tare
Balance overloaded. Use less sample.
Balance Not Operating
Ensure that balance stem is installed and centered.
No Microwave Drying
Instrument cover not closed and latched 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.
Sample Burning
Sample too large and/or unevenly applied to pad.
Sample not homogeneous. Sample not positioned
under temperature sensor. Power level too high.
Results Not
Sample applied unevenly to pad. Sample not
Reproducible
homogeneous and absorbs microwaves unevenly.
Keep sample container closed when not extracting
sample. Work quickly when applying sample to
pads and placing pads on balance pan.
Incorrect Results
Verify proper sample handling, spread techniques
and method parameters.
“Data Results Invalid”
Final weight greater than initial weight. Repeat
Displayed at End of Test
test. Check balance calibration.
“Cover Open” Message
Ensure that the instrument cover is properly
closed.
Low Power
Check for faulty relay and replace if required.
Improper Heating
Ensure that the air shield is installed and not
clogged.
Discoloration or Oil
Replace the air shield.
Buildup on Air Shield