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10. Other Functions
10.1 Display
10.1.1 Detailed Display
10.1.1.1 Span-gas and Zero-gas Correction Ratios
IM 11M12A01-02E
Press the Detailed-data key on the basic panel display to display the detailed operation
data as shown in Figure 10.1.
Pressing the
or
key, you can advance the page or go back to your desired page.
• Detailed-data display
There are ten panel displays for viewing detailed data. The following briefly describe the
operational data displayed on the detailed-data display.
Tag:
Span gas ratio:
0 . 0 %
Zero gas ratio
1 0 0 . 0 %
Response time:
Cell robustness: life>
Cell temperature:
750 C
C.J.temperature:
Hold
Figure 10.1 Detailed-data Display
These are used to check for 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
p1
Span-gas
concentration
Oxygen concentration (vol%O
Zero-gas ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span-gas ratio = (C/A) x 100 (%) Correctable range: 0 ± 18%
Figure 10.2
0 s
1year
47 C
F10.1E.EPS
Previous
zero-gas data
Corrected calibration curve
(theoretical calibration curve)
)
2
Zero origin
B
A
Span origin
0.51
F10.2E.EPS
10. Other Functions
10-1
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