Teledyne 6200A, Manual

Page: 119 / 206

TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
Table 7-9: Activity Matrix for Calibration Procedure
Equipment/supplies Acceptance limits
Frequency and method
of measurement Action if requirements
are not met
Calibration gases NIST traceable Assayed against an
NIST-SRM semi-
annually, Sec. 2.0.7,
(Q.A. Handbook) Working gas standard is
unstable, and/or
measurement method is
out of control; take
corrective action such
as obtaining new
calibration gas.
Dilution gas Zero air, free of
contaminants See Section 2.9.2 (Q.A.
Handbook) Return to supplier or
take appropriate action
with generation system
Multi-point
calibration Use calibration
procedure in
Subsec. 2.2 (Q.A.
Handbook); also
Federal Register
Perform at least once
every quarter or anytime
a level span check
indicates a discrepancy,
or after maintenance
which may affect the
calibration; Subsec 2.5
(Q.A. Handbook) Repeat the calibration
7.8.3 Data Recording Device
Either a strip chart recorder, data acquisition system, digital data acquisition system should be
used to record the data from the 6200A RS-232 port or analog outputs. If analog readings are
being used, the response of that system should be checked against a NIST referenced voltage
source or meter. Data recording device should be capable of bi-polar operation so that negative
readings can be recorded.
7.8.4 Dynamic Multipoint Span Calibration
Dynamic calibration involves introducing gas samples of known concentrations to an instrument
in order to adjust the instrument to a predetermined sensitivity and to derive a calibration
relationship. A minimum of three reference points and one zero point uniformly spaced covering
0 to 80 percent of the operating range are recommended to define this relationship.
The analyzer's recorded response is compared with the known concentration to derive the
calibration relationship.
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