Setra Systems 264 - User Manual

Setra Systems Model 264
Differential Pressure Transducer
1.0 GENERAL INFORMATION
Every Model 264 has been tested and calibrated before shipment. Specific
performance specifications are shown on page 3 of this Guide.
Setra Systems 264 pressure transducers sense differential or gauge (static) pres-
sure and convert this pressure difference to a proportional high level analog
output for both unidirectional and bidirectional pressure ranges. Two standard
output versions are offered: A voltage output of 0 to 5 VDC or a current output
of 4 to 20 mA.
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model 264 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 264 are 0°F to +175°F (-18°C to +79°C).
The compensated temperature range is 0°F to +150°F (-18°C to +65°C).
2.3 Pressure Fittings
The Model 264 is designed to be used with 3/16” I.D. 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 264 is supplied with the optional Conduit Enclosure, access the
electrical terminations by removing the cover. The output of 0 to 5 VDC or
4 to 20 mA is designated by specific Code numbers in the configurable part
number; i.e., 2641xxxxx 11xx x, where 11 designates the 4 to 20 mA output;
2641xxxxx 2Dxx x, where 2D designates the 0 to 5 VDC output. The output is
also shown on the 264 label.
For CE Compliance, a shielded cable with both ends properly grounded is
required.
3.1 Voltage Output Units
The Model 264 voltage output is a 3-wire circuit, with three terminals
available for wiring. These terminals have the designation COM, EXC and OUT
(See Diagram 1). The power supply and signal references are commoned on
the circuit (See Diagram 2). The 264 voltage output can operate from 9-30 VDC
excitation. The 264 has a 0 - 5 VDC output.
Installation Guide

Summary

General Information

Mechanical Installation

Media Compatibility

Specifies that Model 264 transducers are for air or nonconducting gases only, warning against liquids or corrosive gases.

Environment

Details the operating and compensated temperature limits for the Model 264 transducer.

Pressure Fittings

Describes recommended tubing sizes (3/16", 1/4", 3/8" I.D.) for different lengths up to 900 feet.

Electrical Installation

Voltage Output Units

Explains the 3-wire circuit for voltage output units (COM, EXC, OUT) and excitation requirements.

Current Output Units

Details the 2-wire loop-powered 4-20mA output, terminal designations, and power supply requirements.

Calibration

Voltage Output Zero Adjustment

Describes how to adjust the zero output for voltage units while monitoring the output signal.

Voltage Output Span Adjustment

Explains how to adjust the span for voltage units using a pressure standard.

Current Output Zero Adjustment

Details how to adjust the zero output for current units by monitoring current.

Current Output Span Adjustment

Describes how to adjust the span for current units using a pressure standard.

Model 264 Performance Specifications

Returning Products for Repair

Warranty and Limitation of Liability

Setra Systems 264 Specifications

General

Output Signal	4-20 mA, 0-5 VDC, 0-10 VDC
Power Supply	12-30 VDC
Accuracy	±0.25% FS
Media Compatibility	Non-corrosive gases
Pressure Port	1/4" NPT