Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 154)

IM 11M12A01-03E 10-6
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.
0.0%O
2
25.0%O
2 10min./div
12.3%O
2
60 data items
Upper limit set
Lower limit set
Time per graduation,
calculated by the set
sampling period
Currently measured value
Sampling period F10.5E.EPS
Figure 10.5 Plotting Graph for Sampling Period
10.1.2.3 Setting Upper and Lower Limit Values on Graph
Set upper- and lower-limit values on the graph in the following procedure:
Press Upper limit in the Trend graph display. The numeric-data entry key appears. Enter
the upper-limit value. Also enter the lower-limit value in the same way. The allowable
settings for both upper-limit and lower-limit values range from: (1) 0 to 100 %O
2
for
oxygen concentration; (2) 0 to 100 %H
2
O for humidity; and (3) 0 to 1 kg/kg for mixing
ratio.