Other Functions; Detailed-Data Display; Span Gas And Zero Gas Correction Ratios - YOKOGAWA ZR22G User Manual

NOTE
When setting calibration timing requirements, bear the following precautions in mind:
(1) If the calibration interval is shorter than the sum of hold (output stabilization) time plus
calibration time, the second calibration start time will conflict with the first calibration. In such
a case, the second calibration will not be conducted. (When both zero and span calibrations
are to be performed, the calibration time is double that required for a single (zero or span)
calibration.)
(2) For the same reason, if the calibration start time conflicts with manual calibration or semi-
automatic calibration, the current calibration will not be conducted.
(3) If the calibration time conflicts with maintenance service or blow back operations, calibration
will start after completing the maintenance service or blow back operations (see Section
8.2.1, earlier in this manual).
(4) If 000 days, 00 hours are set for the calibration intervals, only the first calibration will be
conducted; a second or later calibration will not be conducted.
(5) If a past date is set to the calibration start day, no calibration will be conducted.
Default Values
When the analyzer is delivered, or if data are initialized, the calibration settings are by default, as
shown in Table 9.1.
Table 9.1
Calibration mode
Calibration procedure
Zero gas (oxygen) concentration
Span gas (oxygen) concentration
Hold (output stabilization) time
Calibration time
Calibration interval
Start date
Start time
9.3 Calibration
NOTE
(1) Perform calibration under normal working conditions (e.g. continuous operation with sensor
mounted on furnace).
(2) Perform both Span and Zero calibration for best resultant accuracy.
(3) When instrument air is used for the span calibration, remove the moisture from the
instrument air at a dew-point temperature of -20°C and also remove any oily mist and dust
from that air.
(4) If dehumidifying is not enough, or if foul air is used, the measurement accuracy will be
adversely affected.
9.3.1 Manual Calibration
For manual calibration, consult Section 7.12, Calibration, earlier in this manual.
Default Settings for Calibration
Item
Manual
Span - zero
1.00%
21.00%
10 minutes, 00 seconds
10 minutes, 00 seconds
30 days, 00 hours
01 / 01 / 00
0:00
Default Setting
<9. Calibration>
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
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