Teledyne Infrared Gas Analyzer Outdoor Gas Burner User Manual


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61 Model 7500 Instruction Manual
Teledyne Analytical Instruments
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 calibration.
3. Zero calibration and span calibration should be performed once a week, if required.
(2) Flow check
1. Sampling gas ow rate and purge gas ow rate should be as follows;
Sampling gas ow rate: 1.0 L / min ±0.5 L / min (stable)
Purge gas ow 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
Parts to be checked Phenomena Cause Remedy
Every day Recorder indication Lower indication 1. Dust is mixed in
the sample cell
1. Clean sampling
cell and check for
sampling device,
especially gas lter
2. Air is sucked in
anywhere in the
sampling tube
2. Check for leak of
the sampling line
and repair if required
Check for purge gas
ow if purging the
sampling gas ow
instrument
Standard ow rate
is 1L / min. It is not
within the range of
the specied ow
rate of 0.5 to 1.5 L /
min.
Adjust the ow
rate with ow rater
needle valve
Replacement
of Monitor lter
(membrane lter)
Much clogged Primary lter is
damaged
1. Replace primary
lter
2. Replace lter
(paper)
Every week Zero point of gas
analyzer
Out of zero point Zero calibration
Span point of gas
analyzer
Out of the standard
point
Span calibration
Replacement
of monitor lter
(membrane lter)
Irrespective of
phenomena
Replace lter
(paper)
Every year Gas analyzer Irrespective of
phenomena
Overhaul
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