GE AKTAprocess, Operating Instructions Manual

Page: 155 / 180

Action Step
Hold the iron tool close to the cross hairs on the side of the level sensor for
a few seconds (> 5 sec but < 10 sec), until the green indicator light starts
flashing at a higher rate than above (approximately 2 Hz).
Note:
The duration of the time that the iron tool is held close to the level sensors
decides how the sensors are calibrated:
•
For an empty air trap the tool should be held < 5 seconds
•
For an air trap filled with liquid, the tool should be held > 5 seconds (but
not more than 10 seconds)
Note:
If the iron tool is held close to the level sensors for more than 10 seconds, the
sensors will lock and cannot be calibrated as described above. To unlock the
sensor, hold the tool close to the sensors for more than 10 seconds once again
until the green light goes off. When the tool is removed the green light will
come on again.
6
Note:
If the surface of the sensors is touched by a hand, the red LED indicators may
come on. The red lights will go off when the hand is removed and this will not
affect the performance of the level sensors.
Remove the iron tool. The flashing will end and the LED indicator light will
display a steady green and yellow light. The sensor is now calibrated. 7
Repeat steps 6 and 7 for the high level sensor. 8
NOTICE
It is recommended that a calibration of air trap level sensors is
performed after every power down.
ÄKTAprocess Operating Instructions 29-0252-49 AA 155
6 Maintenance
6.6 Repair and calibration
6.6.2 Air trap calibration