Yokogawa IR400 - Manual (Page 94)

8 - 3
IM 11G02N01-01E
8.2 Troubleshooting
The following table shows how to remedy other troubles, such as faulty readings.
• Check if the zero gas is supplied to the
analyzer at the specified flow rate.
• Check the optical balance.
(See Subsection 7.3.3, "Optical zero
adjustment method.")
• Check the count value on the display
panel. (Refer to the sensor input value by
maintenance mode.)
• Check if the span gas is supplied to the
analyzer at the specified flow rate.
• Check if zero calibration can be performed
properly.
• Check the count value on the display
panel. (Refer to the sensor input value by
maintenance mode.)
• Take either of the above remedies
depending of the source of the error: zero
calibration or span calibration trouble.
• Check if the sample gas is supplied to the
analyzer at the specified flow rate.
• Check the optical system, e.g., the sample
cell window, O-ring, detector window and
inside of the cell for heavy dirt.
• Check for the influence of interference
from moisture.
• Check if the sample gas contains
interfering components in large quantities
or not.
• Check if the sample gas is supplied to the
analyzer at the specified flow rate.
• Check if the zero and span calibration is
enabled.
Zero calibration fails.
Error No. 4, 5, or 8 occurs.
Span calibration fails.
Error No. 6, 7, or 8 occurs.
Error occurs during auto
calibration.
Error No. 9 occurs.
Drift.
Readings are abnormally
high or low.
Readings do not increase.
• Locate and check gas leaking points,
and take the proper remedy.
• Adjust the optical balance.
• Locate and check gas leaking points,
and take the proper remedy.
• If zero calibration fails, first attempt
remedies for zero calibration trouble.
• Are there any changes from when
zero gas is supplied?
• Locate and check gas leaking points,
and take the proper remedy. (See
Section 3.3.)
• Clean the cell and window. Replace the
part.(See Subsections 7.3.1 and 7.3.2.)
• Adjust interference from moisture.
• Investigate the components of the
sample gas and then contact our
serviceperson.
(See Sec. 9.1 item 4.)
• Locate and check gas leaking points,
and take the proper remedy. (See
Section 3.3.)
• If enabled, sampling (check the
points relating only to the sample gas
and take the proper remedy.)
• If not enabled, check the calibration
related error items.
Symptom Checking Item Remedy, etc.
T8.2.eps