Yokogawa IR200 - Manual (Page 70)

7 - 1
IM 11G02M01-01E
7. MAINTENANCE
7.1 Daily check
(1) Zero calibration and span calibration
1. It is used for zero point adjustment. For calibration, refer to 6.9.1, Zero calibration.
2. After zero calibration, perform span calibration. For calibration, refer to 6.9.2, Span calibra-
tion.
3. Zero calibration and span calibration should be performed once a week, if required.
(2) Flow check
1. Sampling gas flow rate and purge gas flow rate should be as follows;
Sampling gas flow rate: 1.0
±
0.5L/min (stable)
Purge gas flow rate: About 1L/min
2. Maintenance and check should be carried out every day, if required.
7.2 Daily check and maintenance procedures
Table 7-1 Maintenance and check list
Dust is mixed in the
sample cell.
Standard flow rate is
1L/min. It is not within
the range of the
specified flow rate of
0.5 to 1.5 L/min.
Much clogged
Out of zero point
Out of the span
point
Irrespective of
phenomena
Irrespective of
phenomena
Lower indication
Replacement of Monitor
filter (membrane filter)
Zero point of gas
analyzer
Span point of gas
analyzer
Replacement of monitor
filter (membrane filter)
Every week
Every day
Every year Gas analyzer
Recorder indication
Air is sucked in
anywhere in the
sampling tube.
Primary filter is
damaged.
Overhaul.
Replace filter (paper).
Span calibration
Zero calibration
Adjust the flow rate with
flow rater needle valve.
Replace primary filter.
Replace filter
(filter paper).
Check for leak of
the sampling line
and repair, if required.
Clean sampling cell
and check for
sampling device,
especially gas filter.
Remedy Cause Phenomena Parts to be checked
Check for purge gas
flow if purging the
sampling gas flow
instrument.