Zuzi UV-VIS 4481/1 Manual De Instrucciones página 42

5. Reading is not stable
Failure
- The preheating time is no enough.
Numbers flash to
(Generally 30 min)
an increase or
decreasing direc-
- The instrument is affected by environment.
tion unstably
The device is moistened
- The device is moistened
- The source lamp is aging
- The room temperature is too high
Numbers fluctua-
te unstably
- 220V power supply is not stable
- The optical path has some bias
- The preamplifier is broken
6. The deviation of sample reading is huge
Failure
- There is big error in sample agent
- The cuvettes are not well matched
The reading devia-
tes from the stan-
- The cuvette is stained
dard reading
- The device is not stable
- Due to the time or temperature, the sample
solution might fluctuate
7. The deviation can perform zero or full scale adjustment
Failure
- There is an object which obstructs light in
the sample chamber
- The preamplifier is broken
- The motor for filters doesn't work properly
[Autozero] key
doesn't adjust
- The mirror is not the correct position as the
100%T or 0,0000A
source lamp changes
- The mirror in the light chamber is aging
- The source lamp is broken
Manual de instrucciones 54481001
Cause
Cause
Cause
Pág. 42
Troubleshooting
- Increase the preheating time, and reduce
the humidity of room
- Increase preheating time
- Improve the working environement
- Replace with a new source lamp
- Improve the working environment
- Use an AC regulated power
- Readjust the optical path
- Fix or replace with a new one
Troubleshooting
- Inspect the process of sample preparation
and the gauge used
- Calibrate the matched cuvettes, or replace
with new ones
- Clean the cuvette
- Fix the device
- Strictly follow sample testing procedures
Troubleshooting
- Remove the object
- Fix the preamplifier
- Replace the filter motor
- Replace the motor controlling the mirror
- Replace with a new mirror
- Replace with a new lamp
Version 1 December 2015