Setra System Model 567 - Manual (Page 4)

GENERAL
* Transducer should not be subjected to greater than the maximum allowable pressure and
the operating temperature specifications. SEE OPERABLE TEMPERATURE RANGE:
* 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 wetted parts which are 17-4 PH
stainless steels and Nickel Braze to BS 1845 : NK3/HTN2
* Exposed end of cable must be kept free from moisture.
* Liquid must not be allowed to freeze in the pressure port.
Full specifications for all products available on request from our Service Department.
MECHANICAL INSTALLATION
Pressure Connections : G¼ internal pressure connection to BS2779 as standard. Alternative fitted
as specified at time of order.
Pressure couplings screwed into G¼ pressure ports should have a maximum thread engagement 0.05”
(13mm) and UNDER NO CIRCUMSTANCES be allowed to touch the pressure sensitive
diaphragm. Pressure couplings should be sealed against the outer face at the pressure port entry using
bonded seal washer such as:-
Part Number Description
GA29 G¼ bonded seal up to +100°C operation.
Dowty Ref: 400-021-4490-02
Refer to Dowty for external pressure ratings.
Mounting : Pressure Transducer is designed to be attached by the coupling thread only. Omni-
directional. To fit, use a 22.2 mm (7/8 inch) AF wrench on the hexagon provided and apply maximum
torque of 11.65 lbf-ft (15.8Nm). The Customer must ensure that the pressure seal is suitable for the
application. If in doubt contact Setra Systems.
Vibration: Where present, mount in a saddle clamp such as part number GA19 (material:
Polypropylene). Position the clamp as close to the pressure port as practicable.
Effects of Heat: Avoid mounting the transducer near a source of heat which is liable to create a
temperature gradient across the instrument. If this is unavoidable, use a heat shield to deflect uneven
radiated heat or wrap the transducer in glass fibre insulation so that an even temperature is assumed
throughout.