Instruction manual

SM425 INSTRUCTION MANUAL 7.0 STARTUP
Figure 7-10 Equipment Setup
7.6 Confirmation of Detector Type Setting
Check the detector in Figure 7-9 is the correct type.
• If this converter is to be used with the ZO21D, the power requirements are limited to 125 V AC or less,
50 Hz or 60 Hz (it cannot be used with 125 VAC or greater, or in Europe).
• If detector settings are to be changed, first disconnect the wiring connections between the detector and
the converter. Then change detector settings appropriately.
7.7 Selection of Measurement Gas
Combustion gases contain moisture created by burning hydrogen in the fuel. If this moisture is removed,
the oxygen concentration might increase. Specify whether the oxygen concentration in a wet gas is to be
measured directly or compensated for its dry-gas value before use. Select “Select measure gas:” in
Figure 7-9 to choose either wet or dry gas.
7.8 Output Range Setting
This paragraph shows how to set the analog output ranges. For more details, consult Section
1.45,”Current Output Settings”.
7.8.1 Configuring the 4-20 mA Outputs
To configure the 4-20 mA outputs, follow these steps:
1. Select “Setup” from the Execution/Setup display screen.
2. Select “mA-output setup” on the Commissioning (Setup) display screen.
3. Select “mA-output1” on the “mA-outputs” display screen shown in Figure 7-11. The “mA-output1
range” display is shown in Figure 7-12.
4. Select “Min. oxygen conc.” and press the [Enter] key to display the numeric-value entry display.
Enter the oxygen concentration corresponding to the 4-mA output; for example enter [010] for a
ten-percent concentration measurement.
5. Select “Max. oxygen conc.”. Enter the appropriate oxygen concentration corresponding to the 20-
mA output in the same manner as in step 4 above.
6. Set “mA-output2” in the same manner as “mA-output1”.
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