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1.0
GENERAL INFORMATION
Your Setra barometric pressure transducer has been carefully calibrated before
shipment to you, and it should be handled with the same care given any
precision instrument.
The Model 278 barometric pressure transducer senses absolute pressure and
converts this pressure to a proportional high level analog output. Your
pressure transducer has one of the following excitations and output:
Excitation
9.5 to 28 VDC
9.5 to 28 VDC
Check the label on the unit to confirm the excitation and output.
2.0
EMC Certification
This product complies with EN61326 Electrical Equipment for Measurement,
Control and Laboratory use – EMC Requirements for Minimum Requirements
and Industrial Locations. Special caution should be taken to meet Standard
EN61000-4-5: 1995 Surge Immunity if any of the following conditions apply to
the installation: The product is installed outside; all or any part of the cable is
exposed to the outside; the cable is greater than 30 meters in length. In order
to meet the Surge Immunity requirements, the following conditions must be
followed during installation:
1. Shielded cable must be used, and the shield must be tied to earth ground (not power
supply ground) on at least one end of the cable shield/drain wire. The shield must be
maintained all the way from sensor to the power supply.
2. If unshielded cable is used, an earth grounded metal conduit fitting can be used to
replace the shielded cable.
3. For a sensor with a metal body or enclosure, the body/enclosure must be grounded to
earth. If a protective metal housing is used, the metal housing should be grounded to
earth
4. If a protective plastic housing is used, the housing must be able to withstand at least
2 KV from the housing to earth ground, without damaging the circuit.
3.0
MECHANICAL INSTALLATION
3.1 Media Compatibility
Model 278 transducers are designed to be
used with air (up to 95% RH) or non-con
ducting gases. Use with liquids or corrosive
gases may damage the unit.
3.2 Environment
The operating temperature limits of the
Model 278 are -40°C to +60°C
(-40°F to +140°F).
3.3 Pressure Fittings
The Model 278 is supplied with a 1/8 inch
barbed fitting for the pressure connection
and typically installed with push-on tubing.
Installation Guide
Model 278
Barometric Pressure Transducer
Output
0 to 2.5 VDC
0 to 5 VDC
3.6
91
2.4
61
Front View
in.
mm
1
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Table of Contents
Related Manuals for Setra Systems 278
Summary of Contents for Setra Systems 278
- Page 1 The Model 278 barometric pressure transducer senses absolute pressure and converts this pressure to a proportional high level analog output. Your pressure transducer has one of the following excitations and output:...
- Page 2 4.2 Adjustment for Continuous Operation The Model 278 has two operating modes: normal (operating mode) and shut- down (sleep mode). The unit is shipped in sleep mode (shutdown). To change to normal operation mode, an external trigger voltage is needed so that the transducer can wake up and measures pressure.
- Page 3 (978-263-1400) for scheduling. WARRANTY AND LIMITATION OF LIABILITY SETRA warrants its Model 278 Transducer products to the original consumer purchaser against defects for a period of two years from the date of sale by SETRA, as shown in its shipping documents.
- Page 4 SERVICE/REPAIR/CALIBRATION ORDER RETURN FORM Setra Systems, Inc. 159 Swanson road Boxborough, MA 01719 Repair Dept. Fax #: 978-266-2158/Phone #: 978-266-2194 All lines must be filled out. This form must accompany all returns. Returns that arrive with no information will be rejected.
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