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Teledyne API – Model T300/T300M CO Analyzer EPA Calibration Protocol
237
10.3. PRECISIONS CALIBRATION
Calibration must be performed with a calibrator that meets all conditions specified in
QA Handbook
1
Vol II Part 1, App 15, Sec. 4.4 & 5.4. The user should be sure that all
flow meters are calibrated under the conditions of use against a reliable standard. All
volumetric flow rates should be corrected to 25
o
C (77
o
F) and 760 mm-Hg (29.92in–Hg).
Make sure the calibration system can supply the range of the concentration at a
sufficient flow over the whole range of concentration that will be encountered during
calibration.
All operational adjustments to the T300 should be completed prior to the calibration.
The following software features must be set into the desired state before calibration.
If the instrument will be used for more than one range, it should be calibrated
separately on each applicable range.
Automatic temperature/pressure compensation should be enabled. See Section
5.7.
Alternate unit
s, make sure ppm units are selected for EPA monitoring. See Section
5.4.4.
The analyzer should be calibrated on the same range used for monitoring.
10.3.1. PRECISION CALIBRATION PROCEDURES
To perform a precision calibration during the instrument set up, the input sources of zero
air and sample gas and procedures should conform to those described in Section 9.2 for
analyzers with no valve options or with an IZS valve option
installed and Section 9.3 for
analyzers with Z/S options
installed.
10.4. AUDITING PROCEDURE
An audit is an independent assessment of the accuracy of data. Independence is
achieved by having the audit made by an operator other than the one conducting the
routine field measurements and by using audit standards and equipment different from
those routinely used in monitoring. The audit should be a true assessment of the
measurement process under normal operations without any special preparation or
adjustment of the system. Routine quality control checks conducted by the operator are
necessary for obtaining and reporting good quality data, but they are not considered part
of the auditing procedure. Audits are recommended once per quarter, but frequency
may be determined by applicable regulations and end use of the data.
Refer to The Q.A. Handbook
1
Volume II, Part 1 Section 16 (for a more detailed
description).
10.4.1. CALIBRATION AUDIT
A calibration audit consists of challenging the T300/T300M with known concentrations
of CO. The difference between the known concentration and the analyzer response is
obtained, and an estimate of the analyzer's accuracy is determined.
The recommended audit schedule depends on the purpose for which the monitoring data
are being collected. For example, Appendix A, 40 CFR 58
5
requires that each analyzer
in State and Local Air Monitoring Network Plan (SLAMS) be audited at least once a
06864B DCN6314