Teledyne 6200A, Manual

Page: 126 / 206

TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
7.8.6 Calibration Frequency
To ensure accurate measurements of the SO
2
concentrations, calibrate the analyzer at the time of
installation, and re-calibrate it:
1. No later than three months after the most recent calibration or performance audit which
indicated analyzer calibration to be acceptable.
2. An interruption of more than a few days in analyzer operation.
3. Any repairs which might affect its calibration.
4. Physical relocation of the analyzer.
5. Any other indication (including excessive zero or span drift) of possible significant
inaccuracy of the analyzer.
Following any of the activities listed above, the zero and span should be checked to determine if
a calibration is necessary. If the analyzer zero and span drifts exceed locally established
calibration units or the calibration limits in Section 2.0.9, Subsection 9.1.3 (Q.A. Handbook), a
calibration should be performed.
7.8.7 Other Quality Assurance Procedures
Essential to quality assurance are scheduled checks for verifying the operational status of the
monitoring system. The operator should visit the site at least once each week. It is recommended
Level 1 zero and span check conducted on the analyzer every two weeks. Level 2 zero and span
checks should be conducted at a frequency desired by the user. Definitions of these terms are
given in Table 7-14.
In addition, an independent precision check between 0.08 and 0.10 ppm must be carried out at
least once every two weeks. Table 7-15 summarizes the quality assurance activities for routine
operations. A discussion of each activity appears in the following sections.
To provide for documentation and accountability of activities, a checklist should be compiled
and then filled out by the field operator as each activity is completed.
7-19