About Calibration Gas; Table 3-7: Nist Standards For Co - Teledyne T700 Operation Manual

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3.3.2.2. About Calibration Gas

52
Calibration gas is a gas specifically mixed to match the chemical composition of the
type of gas being measured at near full scale of the desired measurement range. Usually
it is a single gas type mixed with N
compatible gases are also available (e.g. H

Calibration gas should be supplied at a pressure of between 25 PSI and 35 PSI with
a flow greater than the flow rate for the calibrator.
NIST TRACEABLE CALIBRATION GAS STANDARDS
All calibration gases should be verified against standards of the National Institute for
Standards and Technology (NIST).
acquiring cylinders of working gas that are certified to be traceable to NIST Standard
Reference Materials (SRM). These are available from a variety of commercial sources.
The following tables lists some of the most common NIST Primary gas standards

Table 3-7: NIST Standards for CO

SRM
1676
1674b
1675b
2619a
2620a
2621a
2622a
2623a
2624a
2625a
2626a
2745
Teledyne API – Model T700 Dynamic Dilution Calibrator
although bottles containing multiple mixtures of
2
S, O and CO mixed with N
2 2
To ensure NIST traceability, we recommend
2
Description
Carbon Dioxide in Air
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
Carbon Dioxide in Nitrogen
).
2
Nominal Amount of
Substance
365 ppm
7 %
14 %
0.5 %
1.0 %
1.5 %
2.0 %
2.5 %
3.0 %
3.5 %
4.0 %
16 %
06873E DCN7106