Omega Vehicle Security PSW790B User's Manual
Contents
1. DIMENSIONS Inches PSID Ranges DIFFERENTIAL PRESSURE SWITCH PSID A a 90 28 De 3 Holes pF c 16 e q L o U e s 3 4 NPT H 1 4 NPT i 1 4 NPT A High D 2 LG Low Pressure Q Pressure Inlet Inlet l Zy i g DSW490B j G B 0 28 THRU eF 8 PLACES E H L D y VAR A E 3 4 NPT 2 PLACES va ner HeH P L 1 4 NPT PRESSURE LOW PRESSURE INLET INLET L q PSW790B mE a s cepo eE DIMENSIONS Inches HO Differential Ranges ME AE C D E TF G AYI swab 569 40 325 331 513 e 275 psw 638 520 459 ses ax iz ar sw MADE IN USA WARRANTY DISCLAIMER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OMEGA s Warranty adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGAS customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return A2. omega com 9 rue Denis Papin 78190 Trappes TEL 33 0 130 621400 FAX 33 0 130 699120 Toll Free in France 0800 4 06342 e mail france omega com Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 3017 FAX 49 0 7056 8540 Toll Free in Germany 0800 TC OMEGA e mail germany omega com One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5EX United Kingdom TEL 44 0 161 777 6611 FAX 44 0 161 777 6622 Toll Free in the United Kingdom 0800 488 488 e mail sales omega co uk It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification The information contained in this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for patient connected applications INSTALLATION AND MAINTENANCE OF THE DSW490B AND DSW490B SERIES OMEGA SNAP ACTION SWITCHES FOR DIFFERENTIAL PRESSURE CONTROL INTRODUCTION The OMEGA differential pressure switch is a precision built U L approved control device which features a mechanical snap action switch Controllers are available for operation on v
3. plug NEMA 7 amp 9 enclosures require proper conduit seals and breathers as per the National Electrical Code DSW490 SERIES SPDT Wire directly to the switch according to circuit requirements 2 SPDT Dual switching elements consist of two SPDT switches mounted together in a bracket Switches are calibrated to have simul taneous operation within 1 of range either on increasing or decreasing pressure but not in both directions Wire directly to the front and rear switch according to circuit requirements Leads are provided on rear switch color coded as follows Common White Normally Closed Red Normally Open Blue When hermetically sealed switch element s are supplied the lead color coding is as follows Common White Normally Closed Red Normally Open Blue DSW790 SERIES SPDT Wire directly to the switch according to circuit requirements 2 SPDT Wire to front switch terminal block left and rear switch terminal block right as marked Strip insulation 16 insert in proper terminal connector and tighten clamping screw to secure ADJUSTMENT OF SETPOINT DSW490 amp DSW790 Series A single setpoint adjustment nut 7 is located centrally at the bottom on the inside of the enclosure For accurate setpoint calibration mount the switch on a calibration stand a pump or catalog Omega DWT 1305 deadweight gauge tester A suitable reference standard such as a Test Gauge is necessary to ob
4. R number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESS OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR POSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The
5. a ee User s Guide omega com CEOMEGA www omega com e mail info omega com EHE CONTROL EQUIPMENT ENCLOSURE O INDUSTRIAL CAT NO e 24 125 UDC A TIN N nn soosi DSW490B and DSW790B Pressure Control Switches omega com SEOMEGA OMEGAnet On Line Service Internet e mail www omega com info omega com USA ISO 9001 Certified Canada Servicing North America One Omega Drive P O Box 4047 Stamford CT 06907 0047 TEL 203 359 1660 FAX 203 359 7700 e mail info omega com 976 Bergar Laval Quebec H7L 5A1 TEL 514 856 6928 FAX 514 856 6886 e mail info omega ca For immediate technical or application assistance USA and Canada Mexico Benelux Czech Republic France Germany Austria United Kingdom ISO 9002 Em Sales Service 1 800 826 6342 1 800 TC OMEGA Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA Tel 001 800 826 6342 FAX 001 203 359 7807 En Espa ol 001 203 359 7803 e mail espanol omega com info omega com mx Servicing Europe Postbus 8034 1180 LA Amstelveen The Netherlands TEL 31 0 20 6418405 FAX 31 0 20 6434643 Toll Free in Benelux 0800 0993344 e mail nl omega com Rude arm dy 1868 733 01 Karvin TEL 420 0 69 6311899 FAX 420 0 69 6311114 Toll Free in Czech Rep 0800 1 66342 e mail czech
6. ari ous pressure differentials with fixed or variable switching differentials The standard electrical switch is SPDT and is available with various electrical characteristics Two SPDT switch elements mounted together are available Various wetted material construc tions for compatibility with a wide range of pressure media may be obtained The snap action differential pressure switch is furnished in the standard NEMA 4 4X and explo sion proof NEMA 7 and 9 enclosure styles Both enclosures are epoxy coated aluminum castings INSTALLATION These controls are precision instruments and should never be left with internal components exposed During installation insure that covers are in place and conduit openings are closed except when actually working on the control MOUNTING DSW490 AND DSW790 SERIES There are three holes external to the enclosure for surface mounting Location of these holes is shown on the general dimension drawing They may also be mounted directly on pressure line using the pressure connections ELECTRICAL CONNECTIONS Remove cover DSW490 Series two screws hold cover to enclosure DSW790 Series cover unscrews CONDUIT CONNECTIONS Note It is recommended that Teflon tape or other sealant be used on conduit bushing or plug threads to ensure integrity of the enclosure DSW490 series standard one NPT conduit hole right side DSW790 series standard two NPT conduit holes with one permanent
7. harges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have the FOR NON WARRANTY REPAIRS consult OMEGA following information available BEFORE for current repair charges Have the following contacting OMEGA information available BEFORE contacting OMEGA 1 Purchase Order number under which the product 1 Purchase Order number to cover the COST was PURCHASED of the repair 2 Model and serial number of the product under 2 Model and serial number of the product and warranty and 3 Repair instructions and or specific problems 3 Repair instructions and or specific problems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 1999 OMEGA ENGINEERING INC All rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC Where Do I Find Everything I Need for Process Measurement and Control OMEGA Of Course TEMPERATURE 4 Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies A Wire Thermocouple RTD amp Thermistor A Calibrators amp Ice Poi
8. nt References A Recorders Controllers amp Process Monitors IH Infrared Pyrometers PRESSURE STRAIN AND FORCE 4 Transducers amp Strain Gages KH Load Cells amp Pressure Gages 4 Displacement Transducers 4 Instrumentation amp Accessories FLOW LEVEL 4 Rotameters Gas Mass Flowmeters amp Flow Computers IH Air Velocity Indicators A Turbine Paddlewheel Systems A Totalizers amp Batch Controllers pH CONDUCTIVITY A pH Electrodes Testers amp Accessories W Benchtop Laboratory Meters 4 Controllers Calibrators Simulators amp Pumps 4 Industrial pH amp Conductivity Equipment DATA ACQUISITION A Data Acquisition amp Engineering Software 4 Communications Based Acquisition Systems 4 Plug in Cards for Apple IBM amp Compatibles IH Datalogging Systems A Recorders Printers amp Plotters HEATERS 4 Heating Cable 4 Cartridge amp Strip Heaters 4 Immersion amp Band Heaters 4 Flexible Heaters 4 Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL 4 Metering amp Control Instrumentation A Refractometers 4 Pumps amp Tubing A Air Soil amp Water Monitors A Industrial Water amp Wastewater Treatment 4 pH Conductivity amp Dissolved Oxygen Instruments XXXO0000XX M3420 0599
9. remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping c
10. serve convenient changes in pressure A typical calibration procedure would be as follows TERMINAL BLOCK e FRONT SWITCH TERMINAL BLOCK REAR SWITCH Be Static Working Pressure 300 psi Adjustable Differential Range 5 200 psid Differential SetPoint 150 psi above static working pressure Simultaneously raise the high and low side pres sure to 300 psi Maintain the low side pressure at 300 psi Raise the high side pressure to 450 psi to obtain 150 psi differential Turn the adjustment nut until the switch changes mode at 150 psi differential When the setpoint has been achieved raise and lower the high side pressure to ensure that the differential setpoint is correct After installation of the control replace cover to insure electrical safety and to protect internal parts from the environment Note As indicated above adjustment of set point is made by use of 7 nut Precision switch element mounting screws and bracket adjusting screw are factory sealed and should not be tampered with DIFFERENTIAL PRESSURE SWITCH INCHES OF WATER B A D 1 4 NPT LE o 0 28 3 Holes Female Te c nr A f 7 wW 1 4 NPT E Female DSW490B 0 28 THRU 3 PLACES 3 4 NPT 2 PLACES a mung 1 4 NPT SESS FEMALE Cc 1 4 NPT b FEMALE PSW790B
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