OPERATING INSTRUCTIONS MODEL 205-2 PRESSURE
Contents
1. It Iili I Ii setra TL lh OPERATING INSTRUCTIONS MODEL 205 2 PRESSURE TRANSDUCER FOUR WIRE VOLTAGE OUTPUT GENERAL INFORMATION Your Setra transducer has been carefully calibrated before shipment to you and it should be handle same care given any precision instrument Pressure ranges and dimensions are reported on the s bulletin for the transducer INSTALLATION Do not use in ambient conditions corrosive to polyvinyl chloride cable or stainless steel submerge subject to spray or drip or in a high vibration environment The 205 2 Series is very slightly sensitiv acceleration in the pressure fitting axis less than 0 05 psi g typical Factory calibrated in the vertica with pressure port downward this position often minimizes damage from dripping of pressure syster Installation of pressure fitting For very high pressure use of sealant such as Loctite hydraulic sealant is suggested For other pressure ranges standard sealants such as Teflon tape generally are satisfactory For the most sensitive pressure ranges excessive high torquing of a metal pressure fitting m slight zero shift which may be trimmed out using the zero adjustment Use of plastic fittings no noticeable zero shift The torquing effect does not appreciably affect linearity or sensitivit wrench flats on the 205 2 when attaching to fittings Installation with FM approved Explosionproof Weatherproof enclosure 1 Conduit seals shall be placed no more than 18 from the encl2. ROMs LIMITED WARRANTY AND LIMITATION OF LIABILITY SETRA warrants its products to be free from defects in materials and workmanship subject to the follow conditions Without charge SETRA will repair or replace products found to be defective in material or v within the warranty period provided that a the product has not been subjected to abuse neglect accident incorrect wiring not our own impr installation or servicing or use in violation of instructions furnished by SETRA b the product has not been repaired or altered by anyone except SETRA or its authorized service a c the serial number or date code has not been removed defaced or otherwise changed and d examination discloses in the judgment of SETRA the defect in materials or workmanship develo normal installation use and service e SETRA is notified in advance of and the product is returned to SETRA transportation prepaid Unless otherwise specified in a manual or warranty card or agreed to in writing and signed by a SETRA SETRA pressure and acceleration products shall be warranted for one year from date of sale The foregoing warranty is in lieu of all warranties express implied or statutory including but not limited t warranty of merchantability for a particular purpose SETRA s liability for breach of warranty is limited to repair or replacement or if the goods cannot be repe replaced to a refund of the purchase price SETRA s liability for all other breac
3. essure port of the transducer Wher shield is connected to ground the case and pres port of the transducer will also be commoned to ground CALIBRATION SERVICES Setra maintains a complete calibration facility that is traceable to the National Institute of Standards NIST If you would like to recalibrate or recertify your Setra pressure transducers please call our F Department at 1 800 257 3872 978 263 1400 for scheduling cost and turnaround estimates RETURNING PRODUCTS FOR REPAIR Please contact Setra 1 800 257 3872 or 978 263 1400 before returning unit for repair to review inf to your application Many times only minor field adjustments may be necessary When returning a product to Setra the material should be carefully packaged and shipped prepaid t Setra Systems Inc 159 Swanson Road Boxborough MA 01719 Attn Repair Department To assure prompt handling please supply the following information and include it inside the package material Name and phone number of person to contact Shipping and billing instructions Full description of the malfunction Identify any hazardous material used with product Notes Please remove any pressure fittings and plumbing that you have installed and enclose any mating electrical connectors and wiring diagrams Allow approximately 3 weeks after receipt at Setra for the repair and return of the unit Non warranty repairs will not be made without customer approval and a purchase order to cover rep
4. hes is limited to a ue purchase price In no instance shall SETRA be liable for incidental or consequential damages aris ng fro warranty or from the use or installation of its products No representative or person is authorized to give any warranty other than as set out above or to aggume any other liability in connection with the sale of its products Setra Systems Inc ees Product Line Summary me Pressure Transducers Transmitters Gages amp Accelerometers R amp D Test amp Measurement j 0 02 3 6 max Zerd Vacuum Systems j ters Engine Test Cells Off Road Equipment Hydraulic Equipment Compressor Control HVACIR Equipment Industrial Engines Corrosive liquids or gases Gas Bottle Filling Equipment Compound 0 14 212FT 1 5 27 max Zero Uttra High Purity Pharmaceutical amp Biotechnology 0 22 212 1 0 1 8 max Span Gas amp Liquid Compatible 0 75 1 4 Zero 15 10000 psig 1 5 2 7 Span 25 5000 psia Typ 14 7 to 100 psig 20 3 6 max Zero Off Shore Drilling 3 15 psig 12 0 3 6 max Span 600 1100 mbars Laser Interferometers j 800 1100 mbars J 0 1 18 max Zero Altimeter Setting Indicators 10 to 100 psia i 0 2 36 Baro Transfer Pressure Standard 5 to 100 psig 0 1 18 max Spanj Sanitary Pressure Lines Food amp Beverage Processing 2 0 3 6 max Zero Gas or liquid Tank Level Measurement 1 to 1000 psig 2 0 3 6 max Span compatible Pharmaceutical Processing wih stainless Sanitar
5. ld and negative excitation black adg Sensitivity Adjust Circuit is reversed voltage protected for at least 5 minutes Int rnal Q transient suppression network is provided for short duration tr ANS 150 volts In some instances use of long cables several hunted fest length may introduce enough cable capacitance into the output circuit to cause output oscillation If encountered this oscillation may be eliminated by conne ohm resistor 1 8 watt or larger in series in each of the output leads at the end of the 2 foot transduc These series resistors of course add to the output resistance CAUTIONExcitation power or voltage in excess of 15 VDC inadvertently applied to the output leads damage the electrical circuit Care must be taken when installing this transducer that the excitation applied to the output leads by mistake Shielding or other precaution should be provided to assure tl voltages in excess of 15 VDC are not applied to the output leads ADJUSTMENTS with cover removed CAUTIONTURN OFF EXCITATION POWER DURING COVER REMOVAL OR REPLACEMENT ZERO PRESSURE OUTPUT Unit factory adjusted to withihmV Can be adjusted by the air trim capacitor as shown in the diagram adjustments will begin to change sensitivity SENSITIVITY Can be adjusted by potentiometer as shown on diagram Unit factory adjusted to order specification OTHER ADJUSTMENT Adjusted at factory Touching any adjustments other than zero output or sensitivi
6. osure 2 Cables with gas vapor tight continuous sheath capable of transmitting gas or vapor thre cable core shall be sealed per National Electric Code NEC for Class 1 Division 1 mo revision 3 Caution Do Not open cover while circuits are live ATMOSPHERIC REFEREM 6 d pressure transducer only Lower range units are subject to excessive thermal zero shift unless vented to atmosphere The ele provides this equalization vent ELECTRICAL CONNECTIONS CABLE LEAD FUNCTION Red positive excitation Green positive output White negative output Black negative excitation Shield case ELECTRICAL The electrical circuit is equivalent to a 4 terminal network which can be grounded at only one point negative excitation or the negative output lead but must not be commoned or grounded at more tha The negative output lead is approximately 1 66 VDC above the negative excitation lead The positi lead is at this same 1 66 VDC common mode voltage plus the output signal from applied pressure from approximately 1 66 VDC up to 6 66 VDC above the negative excitation The pressure transducer must be operated with the case connected either to the negative excitation to the negative output terminal Failure to do this may result in damage to or ity Adjust unsatisfactory operation of the unit This connection may be made by co rie ouch the shield to white or shield to black leads Best shielding against nojge wi ill b obtained by connecting the shie
7. ty may necessitate Do not touch INSTALLATION INSTRUCTIONS FOR MULTIPLE HOOK UP OF A 4 WIRE SETRA PRESSURE EX out i PT DVM DAS Option 1 ox out Uses a single ground referenced power supply f excitation and separate isolated not ground power E ee Suna referenced readout or differential input to a de SUPPLY E out acquisition system for each pressure transducer im output EX out ROUN DVM DAS GROUND cut Option 2 POWER Uses a separate isolated power supply for each SUPPLY pressure transducer s excitation and a single ground referenced readout or single ended input Power DVM DAS to a data acquisition system for all of the outputs S P PS Power Supply Nominal 24 VDC F PT Pressure Transducer 4 Wire Circuit POWER pr J DVMIDAS Digital Volt Meter or Data Acquisition System SUPPLY ar x __ out Option 3 EX N tout ut PT EX 0 POWER SUPPLY DVM DAS out out ebdbde g Ex out PT om las EX PT EX out Uses a single ground referenced power supply for excitation and either a single isolated reado with a bipolar switch that breaks before makes both the output and output of each pressure transducer or a single data acquisition system w a multiplexer MUX NOTE The shield is internally commoned to the case and pr
8. y Filtration Systems steel Process Control Gas or liquid Filter Condition Monitoring 2 0 3 6 max Zero compatible with Refrigeration Equipment 2 0 3 6 max Span stainless steel Pump Speed Control both pressure amp HVAC Equipment reference sides HVAC Control High Pressure Port Leak Detection 05 to 30 WC 0 14 Ceara Environmental Testing 40 25 to 15 WC Option 1 0 1 8 max Zero patible with SS R amp D Scientific 5to 10 psid i 4 0 1 8 max Span Aluminum amp Bune N Low Pressure Port 22 pioto psd lean dry air or inert HVAC and VAV Control 0 1 to 25 WO 0 1 to 5 WC 33 59 j Zero amp Span combined Oto 10 20 50 100 psia 2 4 8 15 30 60 150 600g Robotics Response Shock amp Vibration Testing DC to 3000 Hz ft A ANH ga im mi lh ae I 159 Swanson Road Boxborough MA 01719 1 800 257 3872 978 263 1 404l hm W w SSO251REV B 10 23 97
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