Controller / User Interface | 4-41
Custom Output (Custom Setup)
The Custom Output dialog box contains units information and configura-
tion parameters for custom setup.
Conversion Factors
The units of measurement used for gas species concentrations (PPMV is
equal to 1). The analyzer always computes the concentration in PPMV.
To have the analyzer output concentration values in other units, a con-
version factor is required. See Conversion Factors chart below.
The concentration result, the drift specification, the span concentra-
tion, and the alarm threshold of a species must be in the same unit of
measurement.
Conversion Factors in Custom Setup Chart
Conversion from ppm to mg/Nm^3 Conversion from mg/Nm^3 to ppm
H
2
S: 1.416581 mg/Nm^3 per ppm H
2
S: 0.705925 ppm per mg/Nm^3
COS: 2.49747 mg/Nm^3 per ppm COS: 0.400405 ppm per mg/Nm^3
MeSH: 1.999695 mg/Nm^3 per ppm MeSH: 0.500076 ppm per mg/Nm^3
The coefficients listed in the Conversion Factors chart have been calcu-
lated based on a 20 °C and 1 atmosphere standard. Contact AMETEK
for conversion numbers for 25 °C, 15 °C, 0 °C, or any other tempera-
ture and pressure.
Custom Results
The weighted sum of the first four species. A multiplication factor is
applied to each concentration before it is summed with the next con-
centration.
For example: Custom Result = Sum of the sulfur species
1 * H
2
S + 1 * COS + 1 * MeSH
NOTE
Figure 4-19.
Custom Output dialog
box.
Setup (tab)Custom
Setup
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