Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 113)

IM 11M13A01-02E 7-14
7.12 Calibration
The converter is calibrated in such a way that the actual zero and span gases are mea-
sured and those measured values are used to agree with the oxygen concentrations in the
respective gases.
There are three types of calibration procedures available:
(1) Manual calibration conducting zero and span calibrations, or either of these calibra-
tions in turn.
(2) Semi-automatic calibration which uses the touchpanel or a contact input signal and
conducts calibration operations based on a preset calibration time and stable time.
(3) Automatic calibration conducted at preset intervals.
Manual calibration needs the ZA8F Flow Setting Unit to allow manual supply of the
calibration gases. Semi-automatic and automatic calibrations need the ZR40H Automatic
Calibration Unit to allow automatic supply of the calibration gases. The following
sections set forth the manual calibration procedures. For details on semi-automatic and
automatic calibrations, consult Chapter 9, “Calibration,” later in this manual.
7.12.1 Calibration Setup
7.12.1.1 Mode Setting
For the mode setting, do the following:
Press the Setup key in the basic panel display to display the Execution/Setup display.
Select Maintenance in the Execution/Setup display to display the Maintenance panel
display. Then select Calibration setup to display the Calibration setup display as Figure
7.16 shows. Select Mode in this panel, and then select “Manual,” “Semi-Auto” or
“Auto.”
Enter
Mode: Manual
᭜ Points: Both
᭜ Zero gas conc: 1 . 0 0%
᭜ Span gas conc: 2 1 . 0 0%
᭜
Timing
Calibration setup
F7.16E.EPS
Figure 7.16 Calibration Setup
7.12.1.2 Calibration Setting Procedures
Select “Points” (calibration procedure) in the Calibration setup display to display the
“Span – Zero,” “Span, Zero” selection display. In this display, select “Span – Zero.”
7.12.1.3 Calibration Gas Concentration Setting
(1) Zero-gas concentration
If zero-gas concentration is selected, the Numeric-data Entry display then appears.
Use this display to enter an oxygen concentration value for the zero-gas calibration;
if the oxygen concentration is 0.98 vol%O
2
, enter 00098.