Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 115)

IM 11M12D01-01E 7-5
7. Startup
7.5 Supply Power to Averaging 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.
Before connecting power check that power switch is set to "O (Off)". After connecting
power. Turn power switch to "I (On)". The startup display is displayed for about 10
seconds then the multi-channel cell temperature display shown in Fig. 14 appears.
Confirm that the displayed temperatures of each channel gradually increase.
After the cell temperatures reach their target setting of 750
؇C and stabilize, the display
switches to show oxygen concentration. When all the channels have switched to display
oxygen concentration, the red [Warmup] and [Hold] alarm marks at the bottom of the
display disappear.
Warmup
Tag:
Ch1
514
Њ C
Ch2
515
Њ C
Ch3
513
Њ C
Ch4
514
Њ C
Ch5
514
Њ C
Ch6
514
Њ C
Ch7
513
Њ C
Ch8
519
Њ C
Hold
F7.4E.EPS
Fig. 7.4 Display during warmup
Note
Depending on furnace conditions, the cell temperature may overshoot the target by
10~15
؇C during the warmup phase. This is not an abnormality.