Setra System 269 - Manual

Setra Systems Model 269 High Performance
Very Low Differential Pressure Transducer
1.0 GENERAL INFORMATION
Every Model 269 has been tested and calibrated before shipment. Specific performance specifications are shown on
page 3 of this Guide.
Setra Systems 269 pressure transducers sense differential or gauge (static) pressure and convert this pressure differ-
ence to a proportional high level analog output for both unidirectional and bidirectional pressure ranges. A current
output of 4 to 20 mA is offered.
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model 269 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 temperature limits of the 269 are -20°F to +160°F
The compensated temperature range is 20°F to +140°F
2.3 Pressure Fittings
The Model 269 has 3/16” O.D. barbed fittings on a removable process head. Both the positive
(high) pressure port and the reference (low) pressure port are located on the top 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 to100 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 (See Diagram 1).
3.0 ELECTRICAL INSTALLATION
3.1 Current Output Units
The Model 269 is a two-wire loop-powered 4 to 20mA current output unit and delivers rated current into any external
load of 0 to 800 ohms. These terminals have the designation of + and - (See Diagram 1).
Installation Guide