41
7 Trouble Shooting
PROBLEM
Possible
Solution
Instrument Inoperative
Power cord not connected to
outlet
Plug instrument in.
Dead Power outlet Change to a different outlet
Internal fuse blown or defective
electronic component
Call an authorized service engineer.
Improper power input Check the power supply (100v-230v)
Instrument cannot set
100%T (0.000A)
Light beam blocked Check sample holder. See if holder is
properly positioned and nothing is blocking
light path.
Lamp is misaligned. Check to see if light is focused properly on
entrance slit of the monochromator. Call
Technical Service for details (800-588-9776).
Lamp light is weak or lamp is
defective
Replace the lamp
Defective electronic component. Call an authorized service engineer.
Incorrect T% to
Absorbance correlation
Bubbles or particles in solution. Check sample preparation and analytical
procedure.
Defective electronic component. Call an authorized service engineer.
Display does not change
regardless of sample
concentration
Concentration reading “frozen”. Sample Solution too Dark,
dilute it and redo
the measurement.
Wrong wavelength setting. Check sample procedure and wavelength
setting.
Insufficient sample volume. Fill cuvette with more sample solution.
Stray sample preparation vapors. Prepare the sample away from the
instrument. Use proper ventilation.
Bubbles or particles in solution. Check sample preparation and analytical
procedure.
Defective electronic component
or loose wiring.
Check wiring connections;
Call an authorized service engineer.
Instrument drift and
noise
Lamp not adjusted
properly.(misalignment)
Check lamp has been properly installed or
has moved during transit.
Lamp old or defective. Replace with a new lamp.
Power to lamp is not stable Check the power supply PCB to the lamp
Defective or dirty detector or
defective electronic component.
Call an authorized service engineer.
Incorrect readings
obtained
Insufficient sample volume Fill cuvette with more sample solution.
Wrong wavelength setting. Check analytical procedure and wavelength
setting. Check wavelength accuracy
according to procedure in this manual.
Stray sample preparation vapors. Prepare sample away from instrument. Use
proper ventilation.
Bubbles or particles in solution. Check sample preparation and analytical
procedure.
Instrument out of electronic
calibration.
Call an authorized service engineer.
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