Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 137)

<9. Calibration>
9-9
IM 11M12A01-02E
9.2.3 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.
9.2.3.1 Manual Calibration
For manual calibration, consult Section 7.12, Calibration, earlier in this manual.
9.2.3.2 Semi-automatic Calibration
To start calibration, follow these steps:
(1) Press the [Setup] key in the Basic panel display to display the Execution/Setup display.
Then select “Calibration” from the Execution/Setup display. The Calibration display shown in
Figure 9.8 appears.
(2) Select “Semi-auto calibration” to display the Semi-auto calibration display shown in Figure
9.9.
(3) Select “Start calibration”. The display shown in Figure 9.10 appears, and then start
calibration.
Enter
Manual calibration

Semi-auto calibration
Calibration
F9.8E.ai
Check settings
Zero gas conc: 1 . 0 0 %
Span gas conc: 2 1 . 0 0 %
Cal time: 1 0 min 0 0 s
Go to setup to change value.
Start calibration

Cancel calibration
Enter
Semi-auto calibration
F9.9E.ai
Figure 9.8 Calibration Display Figure 9.9 Semi-auto Calibration Display
2 1 . 0 0%
0.5min./div
1 . 0 0%
2 1 . 0 % O2 CAL. TIME
Semi-auto calibration
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Figure 9.10 Semi-auto Calibration Display
8th Edition : Jan.13,2012-00