YOKOGAWA EXAxt ZR22G, User Manual, Page: 132 / 211

<8. Detailed Data Setting>
8-19
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
n
Procedure
To make a fuel setting, follow these steps:
(1) Press the [Setup] key in the Basic panel display to display the Execution/Setup display.
(2) Select “Commissioning” in the Execution/Setup display. The Commissioning (Setup) display
then appears.
(3) Select “Others” in that display and then the Fuel setup shown in Figure 8.17.
(4) Choose the “Theoretical air quantity required” and the “Contents of moisture in exhaust gas”
in turn. The numeric-data entry display then appears. Enter numeric data using the numeric
keys.
(5) Choose “more” in the Fuel setup display. The Fuel setup shown in Figure 8.18 then appears.
(6) Set the numeric data to the “Value of the X coefficient” and then to the “Absolute humidity of
the atmosphere”.
(7) Choose “finished” to return to the display shown in Figure 8.17.
See Manual for details!
Contents of moisture in
exhaust gas: 1. 0 0 m 3 /kg

Theoretical air quantity
required: 1. 0 0 m 3 /kg

more.....
Enter
Fuel setup
F8.17E.ai
Value of the X coefficient:
1 . 0 0

Absolute humidity of the
atmosphere:
0. 1 0 0 0 kg/kg

finished.
Enter
Fuel setup
F8.18E.ai
Figure 8.17 Fuel Setup Figure 8.18 Fuel Setup
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Default Values
When the analyzer is delivered, or if data are initialized, default, parameter settings are as shown
in Table 8.10.
Table 8.10 Default Settings for Fuel Values
Item Default setting
Amount of water vapor in exhaust gas 0.00 m
3
/kg (m
3
)
Theoretical amount of air 1.00 m
3
/kg (m
3
)
X value 1.00
Absolute humidity of the atmosphere 0.0 kg/kg
8.6.4 Setting Measurement Gas Temperature and Pressure
The analyzer calculates the moisture content contained in exhaust gases and saturated water
vapors from the entered gas temperature and pressure to obtain the relative humidity and dew
point. The relative humidity may be obtained using the following theoretical equation (JIS Z
8806).
To obtain the relative humidity:
The relative humidity U that is obtained from JIS Z 8806 is:
U
= e/
es
x 100
where, e = water vapor pressure of moist air
es = Saturated water vapor