Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 139)

IM 11M13A01-02E 8-22
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.
Open the solenoid valve for the automatic calibration span gas during purging and after
the purge time has elapsed, close the valve to start warm-up.
Purging is enabled when the cell temperature is 100
Њ C 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
8.6.4.1 Procedure
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 item 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.
Enter
Others
F8.21.EPS
᭜ Clock
᭜ Averaging
᭜ Fuel setup
Purging
᭜ Unit setup
᭜ Passwords
᭜ Defaults Enter
Purging time: 0 min
Purging
F8.22E.EPS
Figure 8.21 Other settings Figure 8.22 Purging Display