Other Functions; Detailed-Data Display; Span Correction Ratio, Zero Correction Ratio; Cell Response Time - YOKOGAWA ZR22G User Manual

10.

Other Functions

10.1

Detailed-data Display

"Sensor menu" > "Detail"
This section describes each data of sensors.
Figure 10.1
10.1.1

Span correction ratio, Zero correction ratio

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
10.1.2

Cell response time

The cell's response time is obtained in the procedure shown in Figure 10.3. If only either a zero-
point or span calibration has been carried out, the response time will not be measured just as it
will not be measured in manual calibration.
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>
Zero origin
B A
Span origin
0.51
)
F10.2E.ai
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
10-1