30
Glass cuvettes used in UV
range
Use quartz cuvettes
Sample is not stable
Improve the sample
The concentration of sample is
too high
Dilute the sample
Power supply voltage low or
not stable
Improve the power supply
Lamp damage or lamp life
maturity
Replace lamp
Dark current error
during self-check
The lid of the compartment is
open during self-check
Close the lid, restart
System calibration
failed
Something is blocking the light
path
Remove it, calibrate again
Power on, back light is
OK, but nothing
displayed on the
screen or display is
not clear
Display contrast problem
Adjust the contrast potentiometer
Measurements
inaccurate
Cuvettes were contaminated Clean cuvettes
Samples were contaminated Improve samples
Poor matching of the cuvettes
Improve the matching of the
cuvettes
Dark current error
Resample dark current
Repair and Maintenance
Daily maintenance
Check the compartment
After measurement, the cuvettes with sample solutions should be taken out of the compartment in good time,
otherwise the volatilization of the solution may cause mould to form on the mirror. Users must pay attention to
the corrosive sample and liquid which is easy to volatilize. Any solution remaining in the compartment should
be wiped off immediately.
Surface clean
The cover of the instrument is painted. Please use a wet towel to wipe off the drips on the surface
immediately. Organic solution must not be used to clean the cover. Please wipe off any dirt on the cover
immediately.