Priva Compass - pH Interface; Connecting the pH Interface

Cleaning the flow sensor
1. Set the unit to maintenance mode (software-wise and pump switch(es) off).
2. Make sure the main irrigation line is pressure-less and, if necessary, empty.
3. Unscrew the flow sensor from the T-piece.
4. Clean the paddle wheel of the flow sensor using a small, soft brush.
5. Apply a little acid-free grease to the rubber O-rings to prevent them from being damaged when
placing the sensor back.
6. Screw the flow sensor back onto the T-piece: you can only do this one way.
7. Fill and bleed the main irrigation line to prevent water hammer.
8. Check that the flow sensor coupling is not leaking.
Technical specifications – flow sensor
Flow sensor GF2536-P1
(for lines Ø 125 – 160 mm
and 6")
Flow sensor GF2536-P0
(for lines Ø 20 – 110 mm
and 2 – 4")
Flow sensor GF2536-P0
(for lines Ø 20 – 110 mm
and 2 – 4")
Article description
750465 (long housing)750470 (short housing)750470Article number
paddle wheelMeasurement principle
0.3 - 3 m/sMeasurement range
1 % (of max. measured value)Accuracy
0.5 % (of max. measured value)Reproducibility
IP67IP code
4500Minimum Reynolds number required
3.3 - 24 VDCSupply voltage
49 Hz per m/sOutput signal
10 mAMaximum current requirement
7.5 mCable length
2-core shielded twisted pair (22 AWG, 0.326 mm²)Cable type
Technical specifications - T-piece for flow sensor
The K-factor is dependent on the flow sensor, the line diameter of the T-piece and the insertion
depth. A certificate showing the K-factor is supplied with the flow sensor. If the certificate is missing,
you can look up the K-factor in the tables below.
The maximum speed at which the pulses can be processed depends on the hardware used.
T-pieces - lines with a metric diameter
PVC T-piece for flow sensor GF2536-P0, metricArticle description
750476750475750474750473750472750471Article number
63
(DN50)
50
(DN40)
40
(DN32)
32
(DN25)
25
(DN20)
20
(DN15)
Line diameter, external (mm)
2.44 .. 24.41.54 .. 15.40.98 .. 9.80.63 .. 6.30.38 .. 3.80.24 .. 2.4
Measuring range (m
3
/hr) at
a flow rate of 0.3 .. 3 m/s and
lines of pressure class PN16
15.7227.444.9878.54128.32256.9K-factor (pulses per litre)
0.06360.03640.02220.01270.007790.00389Litre per pulse (1/K)
83Installing Priva Compass - 00.014
Flow sensor