YOKOGAWA ZR22G User Manual

<9. Calibration>
9-5
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
21.0 p1 p2 0.51
81.92
ez
e2
e1
es
0
C
AB
Zero-point correction ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span correction ratio = (C/A) x 100 (%) Correctable range: 0 ± 18%
Cell
electromotive
force, mV
Calibration curve
before correction
Corrected calibration
curve (theoretical
calibration curve)
Zero origin
Span gas concentration
Zero gas concentration
Span origin
Oxygen concentration (vol%O
2)
F9.2E.ai
Figure 9.5 Calculation of a Two-point Calibration Curve and Correction Ratios using Zero and
Span Gases
Figure 9.6 shows a one-point calibration using only a span gas. In this case, only the cell
electromotive force for a span gas with oxygen concentration p1 is measured. The cell
electromotive force for the zero gas is carried over from a previous measurement to obtain the
calibration curve. The principle of calibration using only a span gas also applies to the one-point
calibration method using a zero gas only.
21.0 p1 0.51
81.92
ez
e1
es
0
C
AB
Zero point correction ratio = (B/A) x 100 (%) Correctable range: 100 ± 30%
Span 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%O2)
F9.3E.ai
Figure 9.6 Calculation of a One-point Calibration Curve and Correction Ratios using a Span Gas
9.1.5 Characteristic Data from a Sensor Measured During
Calibration
In addition to calibration data, the following data is collected during calibration to determine the
status of the sensors. However, if calibration is not performed correctly (e.g. semi-automatic
calibration, an error occurs when it is automatic calibration), these data in this calibration will
not be collected. These data can be viewed in the log information in converter menu and in the
detailed display in sensor menu. For instructions and instructions on how to operate the data,
refer to Section
“10.1 Detailed-data Display” and “10.2 Converter Detail”.
(1) History of Span Point Correction Rate
The value up to the last 20 times is memorized.
(2) History of zero point correction rate
The value up to the last 20 times is memorized

YOKOGAWA ZR22G Specifications

General

Brand	YOKOGAWA
Model	ZR22G
Category	Measuring Instruments
Language	English