Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 139)

<10. Other Functions>
10-1
IM 11M12A01-02E 8th Edition : Jan.13,2012-00
10. Other Functions
10.1 Display
10.1.1 Detailed-data Display
Press the [Detailed-data] key on the Basic panel display to view 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.
Span gas ratio: 0 . 0 %
Zero gas ratio 1 0 0 . 0 %
Response time: 0 s
Cell robustness: life> 1year
Cell temperature: 750 °C
C.J.temperature: 47 °C
Tag:
Hold
F10.1E.ai
Figure 10.1 Detailed-data Display
10.1.1.1 Span gas and Zero gas Correction Ratios
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.
21.0 p1 0.51
81.92
ez
e1
es
0
C
A B
Zero gas correction ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span gas correction ratio = (C/A) x 100 (%) Correctable range: 0 ± 18%
Cell
electromotive
force, mV
Calibration curve
before correction
Previous
zero gas data
Corrected calibration curve
(theoretical calibration curve)
Zero origin
Span origin
Span gas
concentration
Oxygen concentration (vol%O
2
)
F10.2E.ai
Figure 10.2