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Calibration Procedures Teledyne API - Model T200H/T200M Operation Manual
184
5.2. CALIBRATION PREPARATIONS
5.2.1. REQUIRED EQUIPMENT, SUPPLIES, AND EXPENDABLES
Calibration of the Model T200H/M analyzer requires a certain amount of equipment and
supplies. These include, but are not limited to, the following:
Zero-air source (defined in Section 3.5.1.1).
Span gas source (defined in Section 3.5.1.2).
Gas lines - all gas line materials should be stainless steel or Teflon-type (PTFE or
FEP). High concentration NO gas transported over long distances may require
stainless steel to avoid oxidation of NO with O
2
diffusing into the tubing.
A recording device such as a strip-chart recorder and/or data logger (optional). For
electronic documentation, the internal data acquisition system can be used.
5.2.2. ZERO AIR
Zero air is similar in chemical composition to the Earth’s atmosphere but scrubbed of all
components that might affect the analyzer’s readings. For NO
X
measuring devices, zero
air should be devoid of NO
X
and large amounts of CO
2
, NH
3
and water vapor. Water
vapor and moderate amounts of NH
3
can be removed using a sample gas conditioner
(Section 5.10).
Devices such as the API Model 701 zero air generator that condition ambient air by
drying and removal of pollutants are available. We recommend this type of device for
generating zero air. Please contact our sales department for more information on this.
07270B DCN6512