EC9830 CO ANALYZER OPERATION MANUAL
3-8 98307600 Rev. C-1
1. Use a multi-cylinder system such as the typical one shown in Figure 3-2.
2. The flowmeter need not be accurately calibrated, provided the flow in the
output manifold exceeds the analyzer's flow demand.
3. The various CO calibration concentrations required in the multiple cylinder
method are obtained without dilution by selecting the appropriate certified
cylinders. The suggested method is to span the instrument at the highest
concentration, then perform a dynamic or multipoint calibration with the
remaining cylinders, in sequence.
Note
The dilution method of section 3.2.1.4 is the
recommended method by Ecotech.
3.2.2 Procedure for 5 Point Multipoint Calibration
3.2.2.1 Principle
Multipoint calibration consists of five (5) concentrations across the instruments
operating range. The concentration levels are derived to determine the accuracy
between calculated and expected values of the analyzer using a simple Excel
spreadsheet. This procedure is only to be carried out on a 6 monthly basis or after
the analyzer has had major repair, as per AS3580.7.1. and U.S.EPA Standards.
3.2.2.2 Apparatus
The apparatus discussed in section 3.2.1.2 above should be used to perform the
Multipoint Calibration. In addition to this the following may also be used:
NATA/NIST Traceable Temperature sensor
NATA/NIST Traceable Barometric sensor
NATA/NIST Traceable CO Gas cylinder with dual stage regulator.
Laptop Computer with Microsoft Excel.
Bios DryCal flow calibrator
Ecotech portable zero air source
Ecotech portable Dilution Gas Calibrator
3.2.2.3 Procedure
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