WaterMaster
Electromagnetic flowmeter
4 Electrical Installation
20
IM/WM–EN Rev. M
4.4 Cable Preparation (Remote Systems Only)
To prepare the cable for connection at the transmitter and sensor terminal blocks:
1.
Remove the outer cable insulation and Mylar® wrap.
2.
Ensure the drain wire is sleeved.
3.
Cut the cable connection wires to the lengths shown in Figs 4.10 and 4.11, page 21.
4.5 Transmitter / Sensor Cable Connections
Caution.
Maintain Environmental Protection at all times – See Section 4.5.2, page 22.
Caution.
Make connections only as shown.
Twist the screen wire of D1 / TFE + D2 with the outer screen drain wire and sleeve them.
For standard (non-cathodically protected) systems, connect the drain wire to the earth screw.
For cathodically protected systems, connect the drain wire to terminal SCR, ensuring no braid or
wires touch the exposed copper areas within the transmitter sensor cable wiring area.
If an earth screw is not available at the transmitter enclosure, connect the drain wire to terminal
SCR.
Ensure the seal and mating surfaces are clean to maintain environmental rating.
Conduit connections must provide cable entry sealing.
Ensure cable glands are tightened after wiring. Do not overtighten the plastic cable glands to
avoid destroying their sealing properties. Initially, tighten finger-tight, then a further
1
/
2
to
3
/
4
turn
using a suitable spanner or wrench.
Fit blanking plugs where required.
