21
Troubleshooting
PROBLEM
Possible Cause
Solution
Instrument
Inoperative
(Power indicator
has no light)
Power cord not connected to outlet
Plug instrument in
Internal fuse blown or defective
electronic component
Call an authorized service
engineer
Instrument
cannot be set to
100%T (0.000A)
No Cuvette Adapter in the Sample
Compartment
Cuvette Adapter must be in
Sample Compartment to
open sample holder shutter
Light beam blocked:
Holder misaligned
Shutter
Check sample holder
Lamp is old or defective
Replace Lamp
Lamp is off alignment
Refer to Lamp Replacement
instructions in this manual
Defective electronic component
Call an authorized service
engineer
%T cannot be
set to 00.0%T
Sample holder
Remove Cuvette Adapter or
test tube
Sample holder shutter
May be stuck open Close
shutter
Defective electronic component
Call an authorized service
engineer
Incorrect
Transmittance
to Absorbance
correlation
Bubbles or particles in solution
Check sample preparation
and analytical procedure
Defective electronic component
Call an authorized service
engineer
Digital Display
does not change
regardless of
sample
concentration
Wrong wavelength setting
Check sample procedure and
wavelength setting
Insufficient sample volume
Fill cuvette with more sample
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
Call an authorized service
engineer
