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Model 9110T NOx Analyzer EPA Protocol Calibration
Teledyne Analytical Instruments 222
Calibrations should be carried out at the field monitoring site. The analyzer should be in operation for at
least several hours (preferably overnight) before calibration so that it is fully warmed up and its
operation has stabilized. During the calibration, the 9110T:
Should be in the CAL mode,
The test atmosphere should be supplied through all components used during normal ambient
sampling and through as much of the ambient air inlet system as is practicable.
If the instrument will be used on more than one range, it should be calibrated separately on each
applicable range.
Details of documentation, forms and procedures should be maintained with each analyzer and also
in a central backup file as described in Section 12 of the Quality Assurance Handbook.
Personnel, equipment and reference materials used in conducting audits must be independent from
those normally used in calibrations and operations.
10.2. CALIBRATION EQUIPMENT, SUPPLIES, AND
EXPENDABLES
The measurement of NO
x
, NO and NO
2
in ambient air requires a certain amount of basic sampling
equipment and supplemental supplies. These include, but are not limited to, the following:
Table 10-1: Activity Matrix for EPA Calibration Equipment and Supplies
Equipment/
Supplies
Acceptance Limits
Frequency And Method
of Measurement
Action If Requirements
Are Not Met
Recorder
Compatible with output signal of
analyzer; min chart width of 150 mm (6
in) is recommended
Check upon receipt Return equipment to supplier
Sample line and
manifold
Constructed of PTFE, glass or stainless
steel
Check upon receipt Return equipment to supplier
Calibration
equipment
Meets guidelines and Section 2.3.2 of
Q. A. Handbook
See Section 2.3.9 of Q. A.
Handbook
Return equipment/ supplies to
supplier or take corrective
action
Working standard
NO cylinder gas
Traceable to NIST-SRM SRM. Meets
limits in traceability protocol for
accuracy and stability. Section 2.0.7 of
Q. A. Handbook
Analyzed against NIST-SRM;
see protocol in Section 2.0.7,
Q.A. Handbook
Obtain new working standard
and check for traceability
Recording forms Develop standard forms N/A Revise forms as appropriate
Audit equipment
Cannot be the same as used for
calibration
System must be checked out
against known standards
Locate problem and correct or
return to supplier
When purchasing these materials, a logbook should be maintained as a reference for future procurement
needs and as a basis for future fiscal planning.
10.2.1. SPARE PARTS AND EXPENDABLE SUPPLIES
In addition to the basic equipment described in the Q.A. Handbook, it is necessary to maintain an
inventory of spare parts and expendable supplies. Section 11 describes the parts that require periodic
replacement and the frequency of replacement. Appendix B contains a list of spare parts and kits of
expendables supplies.