Teledyne t320, t320u - page 82

Getting Started Teledyne API – Model T300/T300M CO Analyzer
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3.4.4.1. INTERFERENTS FOR CO MEASUREMENTS
It should be noted that the gas filter correlation method for detecting CO is subject to
interference from a number of other gases that absorb IR in a similar fashion to CO.
Most notable of these are water vapor, CO2, N2O (nitrous oxide) and CH4 (methane).
The T300/T300M has been successfully tested for its ability to reject interference from
of these sources, however high concentrations of these gases can interfere with the
instrument’s ability to make low-level CO measurements.
For a more detailed discussion of this topic, see Section 13.2.1.3.
3.4.4.2. INITIAL CALIBRATION PROCEDURE
The following procedure assumes that:
 The instrument DOES NOT have any of the available calibration valve or gas inlet
options installed;
 Cal gas will be supplied through the SAMPLE gas inlet on the back of the analyzer
(see Figure 3-4)
 The pneumatic setup matches that described in Section 3.3.2.1.
VERIFYING THE T300/T300M REPORTING RANGE SETTINGS
While it is possible to perform the following procedure with any range setting we
recommend that you perform this initial checkout using following reporting range
settings:
 Unit of Measure: PPM
 Analog Output Reporting Range: 50 ppm
 Mode Setting: SNGL
06864B DCN6314