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8.0 CALIBRATION
This section describes a method of performing a multi-point calibration of the Model 300
CO Analyzer and a method of performing a zero-span check.
8.1 REQUIRED EQUIPMENT AND GAS
STANDARDS
Zero air must be free of CO (less than 0.1 ppm of CO).
CAUTION
BE CAREFUL WHEN PULLING IN OUTSIDE AIR
PARTICULARLY IF OUTSIDE HUMIDITY AND
TEMPERATURE ARE HIGH. CONDENSATION
MAY RESULT WHICH CAN LEAD TO
UNSTABLE OPERATION, OR, AT WORST,
WATER CONTAMINATION IN THE CELL.
Calibration gas concentrations must be generated from an NIST-traceable cylinder of
CO-in-air, such as manufactured by Scott-Marrin. Carrier air for transporting the CO
must be the same as the zero air. A suggested calibration gas generating system is shown
in Figure 8.1.
The materials in the calibration gas delivery system should be stainless steel, TFE and
FEP (Teflon). The system must be clean.
The calibration gas delivery system (or manifold) must be properly vented near the
Analyzer inlet to avoid imposing a pressure or vacuum at the inlet. The recommended
venting method is shown in Figure 8.2.
P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 71