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Model 9110TH NOx Analyzer Calibration Procedures
Teledyne Analytical Instruments 197
Data recording devices should be capable of bi-polar operation so that negative readings can be
recorded.
For electronic data recording, the 9110T provides an internal data acquisition system (DAS), which is
described in detail in Section 7.
APICOM, a remote control program, is also provided as a convenient and powerful tool for data
handling, download, storage, quick check and plotting (see Sections 7.2.1, and the APICOM software
manual downloadable from:
http://www,tekedtbe-api.com/manuals ).
9.1.4. NO
2
CONVERSION EFFICIENCY (CE)
In order for the NO
2
converter to function properly, oxygen must be present in the sample stream. In
addition, to ensure accurate operation of the 9110T, it is important to check the NO
2
conversion
efficiency (CE) periodically and to update this value as necessary.
See Section 12.7.10 for instructions on checking or calculating the current NO
2
NO converter
efficiency using 9110T’s onboard firmware.
See Section 12.7.11 for instructions on checking or calculating the current NO
2
NO converter
efficiency using a simplified Gas Phase Titration Method.
9.2. MANUAL CALIBRATION CHECKS AND CALIBRATION OF
THE 9110T ANALYZER IN ITS BASE CONFIGURATION
IMPORTANT
IMPACT ON READINGS OR DATA
ZERO/SPAN CALIBRATION CHECKS VS. ZERO/SPAN CALIBRATION
Pressing the ENTR button during the following procedure resets the
stored values for OFFSET and SLOPE and alters the instrument’s
Calibration.
This should ONLY BE DONE during an actual calibration of the 9110T.
NEVER press the ENTR button if you are only checking calibration..
9.2.1. SETUP FOR BASIC CALIBRATION CHECKS AND CALIBRATION OF
THE 9110T ANALYZER.
Connect the sources of zero air and span gas as shown below in one of the following ways: