CAI 700 NDIR, Руководство оператора

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700 NDIR Analyzer 6-20-2017
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Pressure regulators for zero and span gas cylinders and corrosive-resistant gas tubing are
also recommended.
Zero calibration for the 700 NDIR/O2 Analyzer requires ultra high-purity nitrogen (UHP
N
2
) or calibration-grade air, plus a span gas. The recommended span gas for this analyzer
is NO in a background of N
2
. NO in a background of air is not recommended as some of
it will convert to NO
2
.
Calibration gases can be delivered through either the calibration ports on the back of the
analyzer (if optional solenoid valves have been installed) or through the sample inlet.
Gases introduced through a calibration port should be at 20-25 PSIG. If introduced
through the sample port, pressures should be as follows:
1. Without sample pump, pressure should be 10-25 PSIG.
2. With sample pump – no pressure.
3. Low-pressure configuration should be 3-7 PSIG.
Gas Handling Equipment
Pressure regulators for zero gas (air or N
2
) and span gas cylinders are required for gas
analysis using the 700 NDIR/O
2
Analyzer.
Gas Connections
If the calibration gases are not connected to calibration inlets on the back of the analyzer
(if optional solenoid valves have been installed), the cal gases will need to be delivered
through the sample port at the pressure settings listed above.
The tubing from the sampling system to the gas analyzer should be made from corrosive-
resistant material such as Teflon
®
or Stainless Steel. Rubber or soft vinyl tubing should
not be used since readings may be inaccurate due to gas absorption into the tubing