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3 Operation
3.2.6.2 Purging the detector
The detector for ethane analysis must be kept clean at all times
to prevent distortion of measurement results. When the device
is in use, however, higher hydrocarbons (e.g. propane, butane)
can accumulate in the detector and contaminate it.
The detector is automatically purged after every ethane analysis.
Additional purging of the detector is required in these situations:
●
Cancelled ethane analysis
If an ethane analysis is cancelled, the message
Purging re-
quired
and the
Take sample
symbol appear automatically.
●
Detector contamination suspected
Note:
The purge always takes 4 minutes. A new ethane analysis can
only be started when the purge cycle has been completed.
The device is in measuring mode.
1. Only when detector contamination is suspected:
a)
Press
Menu
.
b)
Select the
Purging
menu item. The message
Purging re-
quired
and the
Take sample
symbol appear.
A
NOTICE! Risk of damaging the sensor
The ethane detector will be damaged if the air supply is
contaminated or moist
●
Always add clean, dry fresh air.
2. Make sure the device is drawing in fresh air.
3. Press
Take sample
.
The purge cycle starts automatically as soon as the gas con-
centration drops below 50 ppm. The time remaining until the
end of the purge cycle is displayed.
After the purge cycle is complete, the device will revert to meas-
uring mode.
