YOKOGAWA EXAxt ZR22G, User Manual, Page: 105 / 211

<7. Startup>
7-8
IM 11M12A01-02E
l
About moisture quantity:
The moisture quantity in the exhaust gas is calculated based on the parameters of the fuel
setting (refer to Section 8.6.3, Setting Fuels, later in this manual). The moisture content may be
expressed mathematically by:
Moisture quantity = {(water vapor content per fuel unit quantity) + (water content in air)}/ total
amount of exhaust gas
= { Gw + ( 1.61

Z

Ao

m )} / { X + ( Ao

m )}
where,
Gw = water vapor content in exhaust gas, m 3 /kg (m 3 /m 3 )
Z = Ambient absolute humidity, kg/kg
Ao = Ideal air amount, m
3
/kg (m
3
/m
3
)
m = Air ratio
X = Fuel coefficient
For details on each parameter, refer to Section 8.6.3, Setting Fuels.
7.9.2 Humidity Analyzer - Setting Display Item
This section briefly describes the display item settings shown in Figure 7.18, “Basic Panel
Display.” If the humidity analyzer /HS option was specified at the time of purchase, the primary
value has set “Humidity.” If a mixing ratio is to be measured, change the current primary value
following the steps below.
Additionally, if the “humidity” has been selected in the Detector Type Setting in Section 7.6, earlier
in this manual, the primary value is set to the humidity and the secondary and tertiary values are
current outputs 1 and 2, respectively when data initialization is performed.
F7-11E.ai
Tag:
Primary value
Secondary value
Tertiary value
4.00mA -Output1
4.00mA -Output2
%H
2
O
0.0
Figure 7.18 Basic Panel Display
(1) Press the Setup key in the basic panel display to display the Execution/Setup display.
Then select Maintenance in the Execution/Setup display.
(2) Select the Display setup from the Maintenance panel display (Figure 7.19). The Display
setup display (Figure 7.20) then appears.
(3) In the above Display setup display, select the Display item. The Display item display (Figure
7.21) then appears. From this display, select the Primary value and press the [Enter] key to
display the Display item selection display (Figure 7.22).
(4) Select the Secondary and Tertiary values in the same manner as in the steps above.
(5) Consult Table 7.2, “Display Items,” enabling the selection of display items in individual
display areas.
16th Edition : Mar. 19, 2020-00