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Summary of Contents for Setra Systems 204
- Page 1 Model 204 & 239 Operating Instructions Setra Systems, Inc. 159 Swanson Road, Boxborough, MA 01719 800.257.3872 • www.setra.com...
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Page 2: Table Of Contents
Table of Contents 1.0 General information and installation ................3 1.1 Ambient conditions ....................3 ..1.2.Installation.of.pressure.fittings ................3 2.0 Electrical information for standard 24 VDC excitation pressure transducers ... 5 2.1 Electrical ........................5 3.0 Electrical information for optional ±15VDC and ±24VDC ........... 6 3.1 Electrical ........................ -
Page 3: General Information And Installation
Use of a plastic fitting often shows no noticeable zero shift. The torquing effect does not appreciably affect linearity or sensitivity. The wrench flat on the 204 and 239 series should be used when installing the positive pressure fitting. - Page 4 A. Positive pressure fitting and media compatibility Model 204, 204D 1/4”-18.NPT.internal.fitting For use with gases or liquids compatible with 17-4 PH stainless steel. (316 stainless steel optional) Model 239 1/8”-27.NPT.internal.fitting For use with gases compatible with stainless steel, hard anodized 6061 aluminum, Buna N “O” ring. (stainless steel in place of aluminum optional) B.
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Page 5: Electrical Information For Standard 24 Vdc Excitation Pressure Transducers
2.0 Electrical information for standard 24 VDC excitation pressure transducers (nominal) Connections (Model 204, 239; electrical termination Y1, Y4, Y4, Y6) Red Cable Cable Lead Function White Positive excitation Yellow Positive output Brown Negative output Black Negative excitation Shield Case... -
Page 6: Electrical Information For Optional ±15Vdc And ±24Vdc
(option G) and ±24VDC (option E) Excitation pressure transducers Note Any figures in parentheses ( ) pertain to the ±24 VDC excitation units only. Connections (Model 204, 239; electrical termination Y1, Y3, Y4, Y6) Red cable (9 conductor) Cable Lead Function... -
Page 7: Adjustments For Zero And Sensitivity
4.1 Zero pressure output Can be adjusted to zero by potentiometer as shown in diagram. Unit factory - adjusted to zero output (±10 mV for Model 204 and ±20 mV for Model 239). 4.2 Sensitivity (span) Can be adjusted by potentiometer as shown on outline diagram. Unit factory - adjusted to order specifications. -
Page 8: Remote Control Instructions For Pressure Transducers
(Option M), Blue connect the yellow, blue and violet* leads and adjustable resistance as shown. Violet *For Models 239 and 204 w/options E/G and M, *Red (M239 w/Option 621/622 *Red (M239 w/option E/G and M) replace violet lead as shown. -
Page 9: Installation Instructions For Multiple Hook-Up Of 4-Wire
Adjustable calibration signal, on closing circuit with an adjustable resistance between red and black leads. Suggest use of a 100K potentiometer. 6.0 Installation instructions for multiple hook-up of 4-wire pressure transducers (24 VDC units only) PS - Power supply (nominal 24 VDC) PT - Pressure transducer (4-Wire Circuit) DVM/DAS - Digital voltmeter or data acquisition system Option #1... - Page 10 Option #3 Uses a single, ground referenced power supply for excitation and either a single, isolated readout with a bipolar switch that “breaks before makes” both the + output and the - output of each pressure transducer, or a single data acquisition system with a multiplexer (MUX) Note: The shield is internally commoned to the case and pressure port of the transducer.
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Page 11: Returning Products For Repair
7.0 Returning products for repair Setra Systems cannot accept a Model 760 for repair unless the Form 760ERN is completes. Contact Setra Systems for an ERN number or the form 760ERN. Form 760ERN is included in this guide on page 15. - Page 12 Setra Systems, Inc. 159 Swanson Road, Boxborough, MA 01719 800.257.3872 • www.setra.com...
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