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Commissioning of the Sensors
6.1
Setting of the Flow Meter Switching Point
Reduce the fl ow rate for the test - the alarm device must engage.
Check the screw fi tting for leakages.
For in-line probe DLG III and T-piece:
Objective: Flow rate reduction is to switch – “Pause” at controller given closed input
Set the fl ow rate at the ball valve.
Setting value: 40 l/h
Test value: 30 to 60 l/h (read at the upper edge of the fl oat)
Loosen the fl ow rate sensor.
Move the fl ow rate sensor in the rail from the top to the bottom until the controller goes to
“Pause”.
Move the fl ow rate sensor to the top until “Pause” at the controller is just cancelled.
Secure the fl ow rate sensor.
Reduce the fl ow rate for the test - the controller must go to “Pause”.
6.2
Running-In Period
A running-in period is to be observed for all amperometric sensors. Depending on the sensor, this
may vary between 1 hour and 24 hours. The respective sensor, electrically connected, must be
positioned in the sample water to be measured in a system with fl ow. This sample water must
already contain the measured variable in the quality and quantity suffi cient for the process.
Running-in of the sensors is described in the respective chapter for the measured variable.
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24.02.2009 11:56:04 Uhr
24.02.2009 11:56:04 Uhr