GENERAL
*
Transducer should not be subjected to greater than the maximum allowable pressure
(P.S.)
/ Temperature (T.S) as defined on the transducer label.
*
Transducer should not be subjected to mechanical impact.
*
In the event of fire the end user must ensure that the system pressure is vented to a safe
area.
*
The effects of decomposition of unstable fluids should be considered by the user when
placing this device in service.
*
The pressure transducer has no means of draining or venting, this must be performed by
another component in the end users system.
*
Pressure range must be compatible with the maximum pressure being measured.
*
Pressure media must be compatible with the transducer/transmitter wetted parts listed in
these instructions.
*
Liquid must not be allowed to freeze in the pressure port.
*
The gasket must be fitted under the electrical connector.
MECHANICAL INSTALLATION
Mounting
: Pressure Transducer is designed to be attached by the coupling thread only.
Omni-
directional, self supported directly into the pipework. Use a 19mm AF (3/4") spanner on the
hexagon provided to apply a maximum torque of 15.8Nm.
The Customer must ensure that the
pressure seal is suitable for the application. If in doubt contact Gems Sensors.
ELECTRICAL INSTALLATION
All types with the CE Mark include suppression devices providing transient protection to
EN 61326-4 and EN 61326-2-3. Conformity with the requirements of the CE mark only applies
when connection is made with Gems Sensors approved cable, see APPROVED CABLE section,
and is connected as shown below:-
Millivolt Output Transducers
: Four core screened cable should be used with the cable screen
connected to the instrumentation earth. The cable screen should not be connected to the
transducer body.
High Output Transducers/Transmitters
: The screen of the cable must be earthed at the
instrumentation end. If an 'Earth Loop' problem is encountered when the body of the unit is
earthed by the pipework it is permissible to remove the cable screen from the instrumentation
earth.
APPROVED CABLE
Gems sensors uses cables comprising 2, 3 or 4 colour-coded cores, enclosed by an aluminised
polyester screen where the screen is in intimate contact with a separate drain wire. The outer
sheath is chrome PVC and overall diameter is approximately 4 mm.
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