Setra System Model 265 - Manual

Setra Systems Model 265
Differential Pressure Transducer
1.0 GENERAL INFORMATION
Every Model 265 has been tested and calibrated before shipment. Specific
performance specifications are shown on page 3 of this Guide.
Setra Systems 265 pressure transducers sense differential or gage (static) pres-
sure and convert this pressure difference to a proportional high level analog
output for both unidirectional and bidirectional pressure ranges. The Model
265 is available in the following excitation and output versions:
Excitation Output
9-30 VDC 0-5 VDC
9-30 VAC 0-5 VDC
12-30 VAC 0-10 VDC
9-30 VDC (measured between the + and - terminals) 4-20 mA
Check the label on the unit to confirm the excitation and ouput.
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model 265 transducers are designed to be used with air or nonconducting
gases. Use with liquids or corrosive gases will damage the unit.
2.2 Environment
The operating and compensated temperature limits of the 265 are 0°F to
+150°F (-18°C to +65°C).
2.3 Pressure Fittings
The Model 265 is supplied with two factory installed 1/4” O.D. pressure
fittings for the pressure signal connection and typically installed with 1/4”
push-on tubing. Both the positive (high) pressure port and the reference (low)
pressure port are located on the front of the unit, labeled “HIGH” and “LOW”
respectively. For best results (shortest response times), 3/16” I.D. tubing is
suggested for tubing lengths up to 100 feet long, 1/4” I.D. for tubing lengths
up to 300 feet, and 3/8” I.D. for tubing lengths up to 900 feet.
3.0 ELECTRICAL INSTALLATION
If the Model 265 is supplied with the optional Conduit Enclosure, access the
electrical terminations by removing the cover.
For CE compliance a shielded cable with both ends properly grounded is
required.
3.1 Voltage Output Units
The Model 265 voltage output is a 3-wire circuit, with three terminals avail-
able for wiring. These terminals have the designation COM, OUT and EXC (see
Diagram 1). [Note: The - designation above COM and the + designation above
EXC are designations for the current output terminals.] The -Excitation and
-Output are commoned on the circuit (see Diagram 2). The 265 voltage output
can operate from 9-30 VDC or 9-30 VAC excitation with 0-5 VDC output, or 12-
30 VAC excitation with 0-10 VDC output.
Installation Guide