Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 156)

IM 11M12D01-01E 9-6
9.2.2 Calibration Setup Procedure
You can perform both Span and Zero calibration, or either one or the other. Normally
select both: Span-Zero.
From [Maintenance] --> [Calibration setup] display, select [Points], then a selection
window opens and you can select Span-Zero, Span or Zero (Fig 9.5).
Enter
F9.5E.EPS
Calibration setup
Span
Zero
Span-Zero
᭜
Mode: Auto
Points:
᭜ Zero gas 9 8 %
᭜
Span gas conc: 2 1 . 0 0 %
᭜ Timing
᭜
Cal. history initialize
Fig. 9.5 Procedure for Setting Calibration Mode
9.2.3 Zero Gas Concentration
This sets the oxygen concentration of the zero gas used for calibration. Enter the value
from the label of the corresponding gas bottle.
9.2.4 Span Gas Concentration
This sets the oxygen concentration of the span gas used for calibration. When the
instrument air supply is used as the span gas, enter 21% O
2
.
Note
When the instrument air supply is to be used as span gas, cool it to -20
؇ C below dew
point to remove moisture, oil mist and dust from the air. If you do not do this to
purify the air, then the accuracy of the calibration may be affected.
1) From the [Calibration setup] display, select [Zero gas conc.], and the numerical data
entry display is displayed. Enter the oxygen concentration of the zero gas used for
calibration. For example, enter 0.98 vol% O
2
as [00098].
2) From the [Calibration setup] display, select [Span gas conc.], and the numerical data
entry display is displayed. Enter the oxygen concentration of the span gas used for
calibration. For example, enter 21 vol% O
2
as [02100].