Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 101)

IM 11M13A01-02E 7-2
7.3 Supplying Power to the Converter
CAUTION
To avoid temperature changes around the sensor, it is recommended that (rather than
turning it on and off) power be continuously supplied to the Oxygen Analyzer if it is
used in an application where it is used periodically.
It is also recommended to flow a span gas (instrument air) beforehand.
Supply power to the converter. A display as in Figure 7.1, which indicates the detector’s
sensor temperature, then appears. As the heat in the sensor increases, the temperature
gradually rises to 750
Њ C. This takes about 20 minutes after the power is turned on,
depending somewhat on the ambient temperature and the measured gas temperature.
After the sensor temperature has stabilized at 750
Њ C, the converter is in measurement
mode. The display panel then displays the oxygen concentration as in Figure 7.2. This is
called the basic panel display.
Warmup
Tag:
319
Њ
C
4.00mA -Output1
4.00mA -Output2
Hold
Tag:
21.0
% O
2
17.43mA -Output1
17.43mA -Output2
Figure 7.1 Sensor Temperature
During Warmup
Figure 7.2 Measurement Mode Display
Figure 7.1 Se