22
PROBLEM
Possible Cause
Solution
Instrument drift
and noise
No sufficient warm up time
Significant temperature change
Lamp not adjusted properly
Check lamp has been
properly installed or has
moved during transit
Refer to Lamp Replacement
instructions in this manual
Lamp old or defective
Replace with a new lamp
Sample Holder Misaligned
Refer to Lamp Replacement
instructions in this manual
Unstable power supply
Defective or dirty detector or
defective electronic component
Call an authorized service
engineer
Incorrect
readings
obtained
Insufficient sample volume
Fill cuvette with more sample
Wrong wavelength setting
Failed to blank (0A/100%T)
Failed to set 0%T
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
