Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 156)

IM 11M13A01-02E 10-5
10. Other Functions
10.1.2 Trend Graph
Press the Graph display key in the basic panel display to switch to the graph display.
This will help grasp the measured-value trend. Touching anywhere on the graph display
will return to the basic panel display. To set the trend graph display, follow the steps in
Section 10.1.2.1.
10.1.2.1 Setting Display Items
(1) Press the Setup key in the Basic panel display to display the Execution/Setup display.
Select Maintenance from the Execution/Setup display.
(2) Select Display setup from the Maintenance display.
(3) Select Trend graph from the Display setup display. The Trend graph display shown
in Figure 10.4 appears.
(4) Select “Parameter: Oxygen” from the Trend graph display. Then select the desired
display item shown in Table 10.2.
Table 10.2 Trend Graph Display Items
Selected item Description
Oxygen concentration Oxygen concentration graph under measurement
Output 1 If this equipment is for the oxygen analyzer, the trend graph
will be an oxygen concentration graph.
Output 2 If this equipment is for the oxygen analyzer, the trend graph
will be an oxygen concentration graph.
T10.2E.EPS
Enter
Parameter:
Oxygen
᭜ Sample interval: 3 0 s
Scale Oxygen
᭜ Upper limit: 2 5 . 0 % O2
᭜ Lower limit: 0 . 0 % O2
Trend graph
F10.4E.EPS
Figure 10.4 Trend Graph
10.1.2.2 Sampling Period
To plot a graph, set the sampling period for the measurement data.
This graph allows the plotting of 60 data items on one graduation on the time axis. So, if
you set a ten-second sampling period, one graduation corresponds to 600 seconds
(Figure 10.5). The allowable sampling periods range from 1 to 30 seconds. If you set a
one-second sampling period, the axis of the abscissas then corresponds to five minutes.
If you set it to 30 seconds, the axis of the abscissas then corresponds to 150 minutes.