Setra System Model 522 - Manual (Page 4)

* 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") wrench on the hexagon
provided to apply a maximum torque of 11.6 lb.ft (15.8Nm).
The Customer must ensure that the
pressure seal is suitable for the application. If in doubt contact Setra Systems.
ELECTRICAL INSTALLATION
All types with the CE Mark include suppression devices providing transient protection to EN 61000-4-2
and EN 61000-4-4. Conformity with the requirements of the CE mark only applies when connection is
made with Setra Systems approved cable, see APPROVED CABLE section, and is connected as
shown below:-
Millivolt Output Transducers: Four wire shielded cable should be used with the cable shield
connected to the instrumentation ground. The cable shield should not be connected to the transducer
body.
High Output Transducers: The shield of the cable must be grounded at the instrumentation end. If
a ‘ground loop’ problem is encountered when the body of the unit is grounded by the piping it is
permissible to remove the cable shield from the instrumentation ground.
APPROVED CABLE
Setra Systems uses cables comprising 2, 3 or 4 color-coded wires, enclosed by an aluminised polyester
shield where the shield is in contact with a separate drain wire. The outer shield is chrome PVC and
overall diameter is approximately 0.20in.
OPERATION
Having installed the transducer as instructed, it is ready for use. The transducer should not be removed
while the system is at pressure. Before applying power, check that the correct polarity and excitation
levels are being applied. See Table 1 for electrical connections.
CALIBRATION
Transducers are calibrated at time of order:
Code A Absolute datum
Code G Gauge datum vented to atmosphere via the electrical connector or cable
Code C Compound datum