< 7. Startup >
7-5
IM 11M12D01-01E
7.6 Selection of Gas to be Measured
Exhaust gas includes steam resulting from combustion of hydrogen and oxygen. You may choose
whether to display the oxygen concentration including the oxygen contained in the steam, or display
the computed “dry” oxygen concentration (a value compensated for the oxygen in steam) which
results in a higher concentration value. For details, refer to “ Fuel Setup” in Subsection 8.5.3.
<Setting Procedure>
1) Touch the Setup key to switch to the [Execution/Setup] display.
2) Select [Commissioning] --> [Basic setup] --> [Select measurement gas] and the [Measurement
gas] display appears.
3) Touch the Enter key and the Measurement gas selection window opens for you to select the
measurement gas.
The Measurement gas selection applies to all channels, you cannot specify it on a channel-by-
channel basis.
7.7 Current Output Range Setting
The output ranges (two ranges) of each channel are independently settable. Ranges are switched by
contact input. Contact OFF results in Range 1, and contact ON results in range 2. For details, refer
to Section 8.4 Setting Contact Inputs. Shipping time default is for each range to be set to 0 to 25%
O
2
. The ratio of the maximum range setting to the minimum is restricted as described in Section 8.1
Setting Analog Outputs.
<Setting Procedure>
1) Touch the Setup key to switch to the [Execution/Setup] display.
2) From the [Commissioning] display select [mA-output setup], then [Set range]. (See Figure 7.6).
3) Use [
] and [
] keys to select the channel.
4) Set [min] O
2
concentration corresponding to 4 mA output, then set [max] O
2
concentration
corresponding to 20 mA output (select, then touch the Enter key).
5) The numeric data entry display shown in Figure 7.7 appears; enter the desired oxygen
concentration setting. To set 10% O
2
, input [010] and touch the Enter key.
6) As necessary, repeat for averaging output a, b and c and other channels.
Enter
mA-output range
max: 25 %O2
Range1
Range2
F7-6E.ai
min: 0 %O2
max: 25 %O2
min: 0 %O2
Ch1
Enter
New value:
0
1
4
7
2
3
5
6
8
9
025 %O2
F7-7E.ai
Figure 7.6 Current-output range
Figure 7.7 Numerical entry
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