Oxygen Concentration (With Time Constant), Humidity (With Time Constant), And Mixing Ratio (With Time Constant); Maximum Oxygen Concentration, Humidity, And Mixing Ratio; Minimum Oxygen Concentration, Humidity, And Mixing Ratio; Average Oxygen Concentration, Humidity, And Mixing Ratio - YOKOGAWA ZR402G User Manual

10.1.19 Oxygen Concentration (with time constant), Humidity
(with time constant), and Mixing Ratio (with time constant)
When the output damping is specified in the mA-output range setting, the corresponding time
constant is also displayed.
10.1.20 Maximum Oxygen Concentration, Humidity, and
Mixing Ratio
The maximum oxygen concentration and the time of its occurrence during the period specified
in the Averaging display are displayed. If the setup period elapses, the maximum oxygen
concentration that has been displayed so far will be cleared and a new maximum oxygen
concentration will be displayed. If the setup period of time is changed, the current maximum
oxygen concentration will be displayed (for more details, see Section 8.6.2 earlier in this manual).
10.1.21 Minimum Oxygen Concentration, Humidity, and
Mixing Ratio
The minimum oxygen concentration and the time of its occurrence during the period specified
in the Averaging display are displayed. If the setup period elapses, the minimum oxygen
concentration that has been displayed so far will be cleared and a new minimum oxygen
concentration will be displayed. If the setup period of time is changed, the current minimum
oxygen concentration will be displayed (for more details, see Section 8.6.2 earlier in this manual).
10.1.22 Average Oxygen Concentration, Humidity, and Mixing
Ratio
The average oxygen concentration during the periods over which average values are calculated
is displayed. If the setup period elapses, the average oxygen concentration that has been
displayed so far will be cleared and a new average oxygen concentration will be displayed. If the
setup period of time is changed, the current average oxygen concentration will be displayed (for
more details, see Section 8.6.2 earlier in this manual).
10.1.23

Span and Zero Correction Ratios

Span and zero correction ratios for the past ten calibrations are recorded to enable you to check
the degradation of the sensor (cell). If the correction ratio is beyond the limits as shown in Figure
10.2, the sensor should no longer be used.
These ratios can be found by calculating the data as shown below.
81.92
ez
Calibration curve
Cell
before correction
electromotive
force, mV
e1
es
C
0
21.0
Span gas concentration
Zero correction ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span correction ratio = (C/A) x 100 (%)
Figure 10.2
Previous
zero gas data
Corrected calibration curve
(theoretical calibration curve)
p1
Oxygen concentration (vol%O )
2
<10. Other Functions>
Zero origin
B A
Span origin
0.51
Correctable range: 0 ± 18%
F10.2E.ai
IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
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