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When installed in an explosive
atmosphere refer to ATEX Safety
Instructions IP341/SI and CSA control drawing
71907/1167 in Section 7.
Section 3 : Installation
3.1 Installation considerations
The ceramic capacitive sensor is extremely
rugged, however, care should be taken to avoid
physical impact of solid objects onto the sensor
face. Care should be taken, particularly in the
case of series 9710, 9720 and 9780 submersible
transmitters when lowering them into a tank, that
solid objects resting on the bottom of the vessel
are not in direct contact with sensor face, as this
will cause large errors.
The use of Aluminium Bronze sensors is strongly
recommended for application on any tanks
that may contain seawater or brine to avoid the
corrosive effects that may be caused by stray
currents. Always check that the sensor being f tted
is of the correct material for the application.
All 9700 units should be installed well away from
tank inlets, pumps and areas of tubulence or
pressure surges, as these can cause errors or
even damage the sensor.
9710 units may be suspended from the cable
provided. However, in moving tanks, such as
found in Marine applications, the sensor should be
clamped or f xed such that damage from impacts
or shock are avoided.
9790 f anged units: Ensure f ange bolts are
tightened evenly and that mA o/p is stable and
correct prior to use.
3.2 Cable and termination
Submersible 9700 units are supplied f tted with
a specif ed length of vented cable. In the case
of units with integral electronics this should be
terminated in a vented box. For units with remote
electronics the vented cable is terminated in the
remote electronics box.
For connection diagrams see Section 4. For
applications where a long cable run is required
when using integral transmitters, the use of a
vented terminal box to be mounted in the nearest
clean and dry area to the tank, and standard 2
core screened cable from the terminal box can
often reduce cabling costs.
Terminate the cable screen to an appropriate
earth point. This connection should be inspected
periodically to ensure an effective contact.
In excessively humid environments and all
shipboard applications, the cable must be
terminated in the control room, or other clean and
dry area, to minimise risk of moisture entering vent
tube and ultimately the sensor. If the transmitter
has been supplied with a remote electronics box,
then this box must be mounted in a clean and dry
area.
Alternatively the cable can be terminated into
the bellows box option which provides a sealed
venting system.
Ensure all cable glands are tight before use (see
Section 5)
1. DO NOT drag the sensor over sharp edges.
2. DO NOT swing the sensor by the cable.
3. DO NOT bend the cable to a radius of less than
80mm radius.
4. DO check cable sheathing for signs of damage
(cuts, weld spatter, burns etc.) particularly inside
the tank area. Damage to the sheathing will allow
process f uid to leak inside the transmitter.
3.3 Re-Ranging
All transmitters are factory calibrated over the
range stated on the label on the transmitter.
In most instances, if re-ranging is required, it is
carried out elsewhere in the 4 - 20mA loop (e.g.
the indicator, PLC or controller).
If the transmitter has been ordered with a
factory f tted remote electronics option, then the
transmitter may be re-ranged on site by removing
the cover of the remote electronics box to give
access to the adjustment potentiometers (See
section 5 for full details).
All other models have factory f tted cables and are
factory sealed - re-ranging of the transmitter is not
recommended as it will require breaking of the
factory seals.
