< 7. Startup >
7-4
IM 11M12D01-01E
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 Averaging Converter 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 Figure 7.4 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
°
C
Ch2
515
°
C
Ch3
513
°
C
Ch4
514
C
Ch5
514
°
C
Ch6
514
°
C
Ch7
513
°
C
Ch8
519
°
C
Hold
F7-4E.ai
Enter
Measurement gas
F7-5E.ai
Select measurement gas:
Wet
Dry
See Manual for details
!
Figure 7.4 Display during warmup
Figure 7.5 Measurement gas selection
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.
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