Hitachi CHROMASTER 5160 Instruction Manual page 131

4.4 Maintenance
4.4.1 Fluctuation, Noise, and Drift of Baseline
Symptom
Fluctuation, Noise of Baseline
Fluctuation, Noise of Baseline
Fluctuation, Noise of Baseline
Drift of Baseline
Check position Possible cause
D lamp
Deterioration,
2
W lamp
Life
Contamination
Cell
Bubbles
Pump
Leak from Flow
Connection of
Flow path
path system
Detector
Flow path
Valve, etc.
system of Pump
Inside diameter of
Drain tube
Length of Drain tube
Environment Vibration
Pump
Leak from Flow
Connection of Flow path
path system
Detector
Substitution of Flow Flow path system
(Column)
path system
Vibration of Room temperature
Environment
Wind
Contamination of Cell
Cell
D lamp
2 Life, Deterioration
W lamp
Contamination,
Column
deterioration of Filler
Column Unstable
oven temperature
Check
Turn off the power and wait for 10 minutes. Turn on the power. If Peak or
Noise level is high as shown in the symptom figures, the life of the lamp is
the cause. If it is low, it can be used. Substitute the liquid for the inside of
Cell, check the baseline. Is the Peak abnormal? Is the Noise level
abnormal? *Guaranteed life of lamp: D lamp: 1,000 hours
2
W lamp: 1,000 hours
Check the inside of the Cell visually.
Is the Cell dirty?
Check the inside of the Cell visually for bubbles.
Are there any bubbles?
Check leak from Pump visually. Is it leaking?
Note: Life of Pump seal is 4 months.
Check leak from all the pushing screws visually.
Are they leaking?
Check leak from Cell visually.
Is it leaking?
Is there abnormal high pressure or abnormal fluctuation?
Is the tube a specified one?
Is substitution of solvent for the inside of the Flow path system enough?
Remove the Column. Connect the Pump and Detector to check
the baseline. Is the drift large?
Result Remedy
Replace the D lamp.
2
Yes Replace the W lamp.
(See the instruction manual for the detector.)
No OK
Clean.
Yes
(See the instruction manual for the detector.)
No OK
Purge.
Yes
(See the instruction manual for the detector.)
No OK
Replace the seal. (See 5.3.)
Yes
No OK
Tighten the pushing screws.
Yes
No
OK
Disassemble the Cell and clean.
Yes
(See the instruction manual for the detecto
No
OK
See 4.4.2 Abnormal Pressure.
Yes
No OK
Yes OK
Replace the Drain tube.
No
(Inside diameter: 0.33 mm, length: 2 m)
No vibration from other instruments.
See "Leak from Flow path system" above.
Substitute the solvent for the inside of Flow path system completely.
Keep the vibration of room temperature within 5C.
Prevent direct air-currents to the Column and Detector.
See "Cell" above.
See "D lamp, W lamp" above.
2
Replace the Column.
Yes
No OK
Wait until the temperature becomes stable.
4 - 15
r.)