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Teledyne API T801 NDIR CO2 Analyzer Operation Manual Calibration Procedures
161
Cylinders of calibrated CO
2
gas traceable to NIST-Standard Reference Material
specifications (also referred to as SRMs or EPA protocol calibration gases) are
commercially available.
Table 9-1: NISTSRM's Available for Traceability of CO
2
Calibration Gases
NIST-SRM Type Nominal Concentration
2619a CO
2
in N
2
0.5%
2620a CO
2
in N
2
1%
2622a CO
2
in N
2
2%
2624a CO
2
in N
2
3%
2744b CO
2
in N
2
7%
2745
1
CO
2
in N
2
16%
Note
For span point calibration it is generally a good idea to use 80% of the reporting
range for that channel. For instance, if the reporting range of the instrument is
set for 5%, the proper span gas would be 4%
.
9.1.3. DATA RECORDING DEVICES
A strip chart recorder, data acquisition system or digital data acquisition system
should be used to record data from the serial or analog outputs of the T801.
If analog readings are used, the response of the recording system should be
checked against a NIST traceable voltage source or meter.
Data recording devices should be capable of bi-polar operation so that
negative readings can be recorded.
For electronic data recording, the T801 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
Section 8.1.1).
07274B DCN6418