Cell Voltage; Thermocouple Voltage; Cold Junction Resistance (C.j. Voltage); Cell's Internal Resistance - YOKOGAWA ZR22G User Manual

10. Other Functions
10.1 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.
Tag:
Span gas ratio:
Zero gas ratio
Response time:
Cell robustness: life>
Cell temperature:
C.J.temperature:
Figure 10.1
10.1.1 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.
81.92
ez
Calibration curve
Cell
before correction
electromotive
force, mV
e1
es
C
0
21.0
Zero gas correction ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span gas correction ratio = (C/A) x 100 (%) Correctable range: 0 ± 18%
Figure 10.2
0 . 0 %
1 0 0 . 0 %
0 s
1year
750 °C
47 °C
Hold
Detailed-data Display
Previous
zero gas data
Corrected calibration curve
(theoretical calibration curve)
p1
Span gas
concentration
Oxygen concentration (vol%O
2
<10. Other Functions>
F10.1E.ai
Zero origin
B A
Span origin
0.51
)
F10.2E.ai
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
10-1