Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 146)

IM 11M13A01-02E 9-5
9. Calibration
9.2 Calibration Procedures
CAUTION
Calibration should be made under normal operating conditions (if the probe is connected
to a furnace, the analyzer will undergo calibration under the operating conditions of
the furnace). To make a precise calibration, conduct both zero-point and span calibrations.
9.2.1 Calibration Setting
The following sets forth the required calibration settings:
9.2.1.1Mode
There are three calibration modes available:
(1) Manual calibration which allows zero and span calibrations or either one manually in
turn;
(2) Semi-automatic calibration which lets calibration start with the touchpanel or a
contact input, and undergoes a series of calibration operations following preset
calibration periods and stabilization time; and
(3) Automatic calibration which is carried out automatically following preset calibration
periods.
Calibrations are limited by the following mode selection:
• When manual calibration is selected:
Manual calibration only can be conducted. (This mode does not allow semi-automatic
calibration with a contact input nor automatic calibration even when its start-up time has
reached.)
• When semi-automatic calibration is selected:
This mode enables manual and semi-automatic calibrations to be conducted. (The mode,
however, does not allow automatic calibration even when its start-up time has reached.)
• When automatic calibration is selected:
This calibration can be conducted in any mode.
To execute this calibration, follow these steps:
(1) Select the Setup key from the basic panel display to display the Execution/Setup
display. Then select Maintenance from the Execution/Setup display.
(2) Select Calibration setup from the Maintenance display. Then select Mode from the
Calibration setup display (see Figure 9.4).
Now you can select manual, semi-automatic, or automatic calibration.