Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 74)

<7. Startup>
7-9
IM 11M12A01-04E
7.6 Selection of Measurement Gas
Combustion gases contain moisture created by burning hydrogen in the fuel. If this moisture is
removed, the oxygen concentration might be higher than before. You can select whether the oxygen
concentration in a wet gas is to be measured directly, or compensated for its dry-gas value before use.
Use the parameter code 「F02」 to set the measurement gas. For details on the parameter code, see
Table 10.7, later in this manual.
Table 7.4 Setting Measurement Gas
Switch operation Display Description
> ∧
ENT A 01
Display after the password has been entered.
> ∧
ENT F 01
Touch the [∧] key to switch to Group F. If an unwanted alphabetic character after F
has been entered, continuously touch the [∧] key to return to the original.
> ∧
ENT F0 1
Touch the [>] key to move the position of the digit that is flashing to the right.
> ∧
ENT F0 2
Touch the [∧] key to change the numeric value to 2. If an unwanted numeric value
has been entered, continuously touch the [∧] key to return to the original.
> ∧
ENT 0
Touch the [ENT] key for confirmation. If 0 (zero) is entered, the oxygen
concentration in a wet gas is already set. If the oxygen concentration in a dry gas is
to be entered, follow the steps below to set 1 (one).
> ∧
ENT 0
Continuously touch the [∧] key, and the position of the digit will change from 1 to 0
to 1 to 0. Release the [ENT] key when 1 (one) is displayed.
> ∧
ENT 0
Touch the [ENT] key. The numeric value will flash.
> ∧
ENT 0
Touch the [ENT] key again to stop the value from flashing.
> ∧
ENT F 03
Touch the [ENT] key once again, and the display will change to the parameter
code selection panel.
> ∧
ENT Basic
panel
display
Touch the [>] key together with the [ENT] key to return to the basic panel display.
(This is not required if you proceed to make another setting.) (The displayed
numeric characters indicate the measurement gas concentration.)
The symbol [ ] indicates that the key is being touched. Light characters indicates that the digits are flashing.
7.7 Output Range Setting
This section sets forth analog output range settings. For details, consult Section 8.2,”Current Output
Settings,” later in this manual.
7.7.1 Minimum Current (4 mA) and Maximum Current (20 mA) Settings
Use the parameter codes 「C11」 to set the oxygen concentration at 4 mA and 「C12」 to set the oxygen
concentration at 20 mA. The following shows where 10% O
2
is set at 4 mA and 20% O
2
at 20 mA.