Electromagnetic Flowmeter
WaterMaster
4 Electrical Installation
IM/WM
Issue 7
31
4.8 Refitting the Cartridge and Cover
Referring to Fig. 4.20:
1.
Confirm that the cartridge to be fitted is of the correct power supply type by checking the label
A
on the side of the cartridge:
–
AC cartridges have one
black
label on the cartridge side.
–
DC (and low voltage AC) cartridges have two
red
DC labels – one on the cartridge side and
one on the cartridge rear plate.
2.
Align the three cartridge screws
B
with the cartridge housing pillars and tighten the screws carefully
until the cartridge is held in position.
3.
If necessary, rotate the cartridge to the required orientation before refitting the cover – see Fig. 4.8,
page 20 for details.
4.
For high integrity/security installations, set DIP switch SW1 to the 'ON' (Read-only) position – see
Fig. 4.19, page 30.
5.
Align the transmitter cover with the housing and tighten the four cover screws
C
carefully.
6.
For high integrity/security installations or where MID is required, fit anti-tamper seals to the security
fixtures
D
.
Warning.
Ensure the transmitter is isolated from power supplies before refitting the cover.
Caution.
To avoid damaging the cartridge during refitting, do not overtighten the cartridge screws.
Fig. 4.20 Refitting the Cartridge and Cover
C
B
C
C
C
B
D
D
D
D
B
A
Model
HW Rev
Manufactured
24V
Model
HW Rev
Manufactured
24V
Black Label on
AC Cartridge Side
Red Label
On DC (and
Low Voltage
AC) Cartridge
Rear Plate
Red Label on DC
(and Low Voltage AC)
Cartridge Side
