
352 GAS ANALYZER
GAS ANALYZER CALIBRATION
As with any precision instrument, periodic calibration is necessary to maintain peak
operating performance. On the PXA series of gas analyzers, there are two types of
calibration:
• Zeroing
• Single-point Gas Calibration
Zeroing is a normal operating function and is covered in Section Zero Gas Analyzer on
page 342.
From the <MAINTENANCE> menu, select <8: CALIBRATION>.
<1: SINGLE POINT CAL> Performs Single-point Calibration using Quad Blend gas.
Calibration Setup
Single-point Gas Calibration with a known-value calibration gas is recommended every
four weeks or as necessary to meet your individual state’s requirement. For all gas
calibration procedures, attach the regulator hose quick-disconnect to the cal gas port on
the Gas Analyzer as shown in the illustration below.
WARNING!
Carbon Monoxide gas is poisonous. Vent gas analyzer exhaust
hose and vehicle tailpipe to the outside.
FIGURE 14. Gas Calibration Setup
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