Instruction manual

6.1 Troubleshooting and Corrective Action
6-3
RF-20A/20Axs
6
S/N ratio fault (weak signal)
This is a flow cell unit fitting fault.
• Check whether the flow cell unit is
securely fitted in the sample
compartment.
P. 8 - 5
P. 8 -11
• Check whether the rear plate is
securely fitted to the flow cell unit.
P. 8 - 5
P. 8 -11
Are there any air bubbles inside
the cell?
• Purge the air bubbles.
P. 8 - 5
• Replace the cell gasket.
P. 8 -11
Is there variation in the
wavelength?
• Perform a wavelength check.
P. 7 -11
• If the wavelength is found not to be
within the stipulations in the check,
carry out wavelength calibration.
P. 7 -11
P.8-39
The sensitivity adjustment is
faulty.
• Sensitivity adjustment is necessary.
Contact your Shimadzu
representative.
−
S/N ratio fault (too much noise)
This is a flow cell unit fitting fault.
• Check whether the flow cell unit is
securely fitted in the sample
compartment.
P. 8 - 5
P. 8 -11
• Check whether the rear plate is
correctly fitted to the flow cell unit.
P. 8 - 5
P. 8 -11
Is the Xenon lamp flickering?
• Replace the Xenon lamp.
P.8-30
Are there any air bubbles inside
the cell?
• Purge the air bubbles.
P. 8 - 5
• Replace the cell gasket.
P. 8 -11
No raman peak of water is
observed.
Is the water used for analysis
contaminated?
• Replace the water.
−
Is the cell contaminated?
• Clean the cell.
P. 8 - 5
P. 8 -11
• Replace the cell.
P. 8 -11
Are there any air bubbles inside
the cell?
• Purge the air bubbles.
P. 8 - 5
• Replace the cell gasket.
P. 8 -11
Is there substantial variance in
the wavelength?
• Check the wavelength accuracy.
P. 7 -11
• If the wavelength accuracy is found
not to be within the stipulations in
the check, carry out wavelength
calibration.
P. 7 -11
P.8-39
Have the lens and/or mirror
deteriorated?
• Clean the lens and mirror.
P. 8 -11
[OVER] is displayed on the
display screen.
Has the output to a Chromatopac
been off-scale in the (+) side?
• Press to perform zero
adjustment.
P. 2 - 8
The setting for [SENS] in the
parameter settings group is too
high.
• Lower the setting for [SENS] in the
parameter settings group.
P.5-19
Symptom Probable Cause Corrective Action Page
350 450
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