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Setup Menu Teledyne API – Model T300/T300M CO Analyzer
108
5.4.5. DILUTION RATIO (OPTION)
This feature is a optional software utility that allows the user to compensate for any
dilution of the sample gas that may occur before it enters the sample inlet. Typically this
occurs in continuous emission monitoring (CEM) applications where the sampling
method used to remove the gas from the stack dilutes it.
Using the dilution ratio option is a 4-step process:
1. Select the appropriate units of measure (see Section 5.4.4).
2. Select the reporting range mode and set the reporting range upper limit (see Section
5.4.3).
Ensu
re that the upper span limit entered for the reporting range is the maximum
expected concentration of the UNDILUTED
gas.
3. Set the dilution factor as a gain (e.g., a value of 20 means 20 parts diluent and 1
part of sample gas):
4. Calibrate the analyzer.
Make sure that the calibration span gas is either supplied through the same dilution
system as the sample gas or has an appropriately lower actual concentration.
EXAMPLE: If the reporting range limit is set for 100 ppm and the dilution ratio
of the sample gas is 20 gain, either:
a span gas with the concentration of 100 ppm can be used if the span gas passes
through the same dilution steps as the sample gas, or;
a 5 ppm span gas must be used if the span gas IS NOT
routed through the dilution
system.
06864B DCN6314