Checking The Position Of The Cleaning Wing; Water Connections; Preparing The Electrode Cable For Connection To The Measuring Amplifier - Grundfos AQC-D13 Montage- Und Betriebsanleitung

10.2 Checking the position of the cleaning wing

The cleaning wing falls out when the measuring
Caution
electrode (J) is removed.
1. Visual inspection:
– The cleaning wing must be seated on the measuring
electrode as shown.
Fig. 13 Position of the cleaning wing
2. If the cleaning wing is not seated correctly:
– Remove the measuring electrode.
– Insert cleaning wing into the bore of the measuring electrode
using the entry pilot. It must be possible to freely move the
cleaning wing.
– Carefully insert the measuring electrode (J) again.

10.3 Water connections

Only tighten the union nut by hand. Do not use any
Caution
tools!
Observe the local pressure! The permissible primary
water pressure is 0.2 to 6.0 bar.
Caution
Fit a pressure booster pump, if necessary.
Check the tightness of the measuring cell.
To avoid a siphon effect: Let the sample water outlet
Caution
(F) point downwards. There must be no
counterpressure (open outflow)!
1. Connect the sample water inlet and outlet to the connections
for the sample water inlet (E) and outlet (F).
E
Fig. 14 Water connections
F
10.4 Preparing the electrode cable for connection to
the measuring amplifier
Note The preassembled systems are prewired.
Warning
The electrical connection should be carried out by
qualified personnel!
Observe the local safety regulations!
Protect the cable connections and plugs against
corrosion and humidity.
Cables for electrodes (A, B, K)
1. Cut the electrode cables to the desired length plus
approximately 80 mm for the connections.
2. Remove 80 mm of the outer insulation.
3. Disentangle the braided screen until you reach the next part of
the insulation, and twist it to form a wire.
4. Strip the braided screen (for instance using a shrink hose),
and fit a wire end ferrule.
5. Remove the black (conductive) sheath of the insulated
electrode wire until you reach the insulation.
6. Dismantle the end of the electrode wire.
7. Fit a wire end ferrule to the electrode wire.
Insulated
braided
screen
Fig. 15 Cable for electrodes (A, B, K)
Cable for measuring electrode (J), temperature sensor (C),
water sensor (D)
1. Cut cables to the desired length plus approximately 65 mm for
the connections.
2. Remove 65 mm of the outer insulation.
3. Dismantle the end of the wires.
4. Fit wire end ferrules to the wires.
13