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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 difference 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 is designed to be used with 3/16" I.D. push-on tubing 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
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Summary of Contents for Setra Systems 269
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Page 1: General Information
The compensated temperature range is 20°F to +140°F 2.3 Pressure Fittings The Model 269 is designed to be used with 3/16” I.D. push-on tubing 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 “+”... - Page 2 However, fine zero and span adjustments can be made thru a calibration secure access key. The Model 269 transducer zero offset is trimmed in the vertical position (pressure ports pointing upward) prior to shipping from factory.
- Page 3 4.5 Restoring Factory Calibration To restore factory set calibration, turn unit off power and press cal button. Turn on the power while cal button is depressed and release cal button. 5.0 MODEL 269 PERFORMANCE SPECIFICATIONS Performance Codes V ±0.25% FS ±0.50% FS ±1.0% FS...
- Page 4 8.0 WARRANTY AND LIMITATION OF LIABILITY SETRA warrants its Model 269 products to the original consumer purchaser against defects for a period of one year from the date of sale by SETRA, as shown in its shipping documents. Without charge, SETRA will repair or replace products found to have manufacturing defects within the warranty period.
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