Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 134)

IM 11M12A01-03E 8-22
8.6.3.2Setting Measurement Gas Pressure
To set the measurement gas pressure, follow these steps:
(1) Call up the Exhaust gas setup display and choose Pressure.
(2) Enter the measurement gas pressure (absolute pressure) from the numeric data
entry display.
8.6.3.3Default Values
When the analyzer is delivered, or if data are initialized, measurement gas temperature
and pressure set ranges and their default settings are as shown in Table 8.9.
Table 8.9 Measurement Gas Temperature and Pressure Set Ranges and Default Settings
Set Item Set range Default setting
Temperature input selection Preset value
Measurement gas temperature 0 to 3000 ЊC 300 ЊC
Temperature at 4 mA 0 to 3000 ЊC 0 ЊC
Temperature at 20 mA 0 to 3000
ЊC
1000
ЊC
Absolute humidity of the atmosphere 0 to 689.47 kPa abs 101.33 kPa abs
T8.9E.EPS
8.6.4 Setting Purging
Purging is to remove condensed water in the calibration gas pipe by supplying a span
calibration gas for a given length of time before warm-up of the detector. This prevents
cell breakage during calibration due to condensed water in the pipe.
The solenoid valve for the automatic calibration span gas is opened during purging and
after the purge time has elapsed, the valve is closed to start warm-up.
Purging is enabled when the cell temperature is 100
ЊC or below upon power up and the
purge time is set in the range of 1 to 60 minutes.
Tag:
30
Њ
C
4mA -Output1
4mA -Output2
Hold Purge
F20.EPS
Figure 8.20 Display during Purging
8.6.4.1Procedure
Set the purging time as follows:
(1) Press the Setup key in the basic panel display to display the Execution/Setup display.
(2) Select Setup in the Execution/Setup display. The “Commissioning” (Setup) display
then appears.
(3) Select Others in that display and the Others display then appears, as shown in Figure
8.21.
(4) Select Purging. The Purging time setting display appears, as shown in Figure 8.22.
(5) Point to the Purging time and press the [Enter] key. Then the display for selecting
purging time appears.
(6) Enter the desired numeric value from the numeric-data entry display.
The allowable input ranges from 0 to 60 minutes.