Compressed Air Monitoring; Technical Requirements; Settings; Teach-In Phase - Graf oneAdvanced Operation Manual

9.2 Compressed air monitoring

This function lets you monitor the operating pressure in the air distributor for all valves. A pres-
sure measured outside of the normal range causes a warning to appear. The causes of too low
a pressure can be a leak or e.g. a pressure hose detached or detaching from the compressor.
Too high a pressure may indicate crushed air hoses or problems with the membrane aerators.
9.2.1

Technical requirements

The KLcontrol.M control unit uses automatically pressure sensor 2. This necessitates an addi-
tional compressed air line between pressure sensor 2 and the top connector on valve 1.
KLcontrol.M with connection P2
9.2.2

Settings

Compressed air monitoring is decoupled from the actual cycle process. Monitored are compres-
sor 1, valve 1, valve 2, valve 3, and valve 4. Compressed air monitoring switches to one of two
states: teach-in phase and monitoring phase:
9.2.3

Teach-in phase

In the teach-in phase, each monitored output returns the pressure values based on the set pa-
rameters. At the end of the teach-in phase, these are used to derive a minimum and a maximum
limit value. If the menu does not present a minimum and maximum value, the controller is still in
the teach-in phase. We recommend setting the teach-in phase to thirty days.
9.2.4

Monitoring phase

The set parameters provide the basis for pressure measurements that are compared with the
calculated minimum and maximum values with consideration to the set tolerance. If a measured
value exceeds this tolerance, a fault is generated and entered in the log book.

9.3 Dosing installations

The oneAdvanced wastewater treatment plant can be fitted with dosing installations.
Dosing applications include:
phosphate precipitation
dosed carbon additions
9. Additional controller functions
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