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Michell Instruments Pura 2-Wire, User Manual

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Pura 2-Wire/3-Wire/Digital Transmitter 

User’s Manual

12

 

 

97070 Issue 12.1, March 2016

MAINTENANCE

4 MAINTENANCE

Calibration

Routine maintenance of the Pura is con

fi

 ned to regular re-calibration by exposure of 

the Pura to sample gases of known moisture content to ensure that the stated accuracy 

of the Pura is maintained. Calibration services traceable to the UK 

National Physical 

Laboratory (NPL) and the US National Institute of Standards and Technology (NIST) are 

provided by Michell Instruments. 

Michell Instruments offers a re-calibration service to suit speci

fi

 c needs. A Michell 

representative can provide detailed, custom advice (for Michell Instruments’ contact 

information go to www.michell.com).

Summary of Contents for Pura 2-Wire

Page 1: ...Pura Trace Moisture 2 Wire 3 Wire Digital Transmitter User s Manual 97070 Issue 12 1 March 2016 S No E114 0 7 3 Product C ode P U R T X 2 W IR E P U R Range 1 2...

Page 2: ...formation when contacting Michell Instruments for service purposes Transmitter Code Serial Number Invoice Date Location of Instrument Tag No Transmitter Code Serial Number Invoice Date Location of Ins...

Page 3: ...communicated in any way to third parties nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd Pura 2 Wire 3 Wire Digital Transmitter S No E114...

Page 4: ...TION 1 1 1 Features 1 2 INSTALLATION 2 2 1 Unpacking the Instrument 2 2 2 Unpacking the Pura SEN 3 2 2 1 Unpacking Pura OEM single bag PREMIUM PRM double bag versions 3 2 3 Pura SEN 4 2 4 Pura OEM PRM...

Page 5: ...Identification 8 Figure 12 Transmitter Mounting Pipe or Duct 9 Figure 13 Connector Installation 10 Figure 14 Installation Location 11 Figure 15 Indication of Dead Space 11 Figure 16 SEN Dimensional D...

Page 6: ...to be applied to the instrument The specified safe working pressure is 24 MPa 240 barg 3480 psig Refer to Appendix A Technical Specifications Toxic Materials The use of hazardous materials in the cons...

Page 7: ...milliampere Mpa megapascal m sec meters per second Nm Newton meter psig pounds per square inch ppmV parts per million by volume RH relative humidity scfh standard cubic feet per hour V volts ohms War...

Page 8: ...l com for details of Michell Instruments worldwide offices contact information 1 1 Features The Pura Series are a continuous on line 4 20 mA digital transmitter family for the measurement of moisture...

Page 9: ...uare 97070 User s Manual Leak Test Certificate VCR Seal for sample block Pura OEM Pura PREMIUM PRM 2 wire 3 wire Digital Transmitter Calibration Certificate Transmitter Connector Already Fitted Alread...

Page 10: ...asket 3 wire or digital sensor only 4 Remove the foam covers from the transmitter but leave the red plastic protective cover 5 the red cap 4 and the connector gasket in place until ready for installat...

Page 11: ...and operating conditions refer to Appendix A Technical Specifications NOTE The OEM and PRM transmitters are protected in transit by putting in a plastic bag filled with nitrogen The Pura OEM has sing...

Page 12: ...onnector Terminal Block Removal Caution When removing the central screw ensure that the small sealing O ring and the washer are retained on the screw and are present during re installation For the tra...

Page 13: ...REEN Signal B BLUE Screen RED Power Figure 9 Rear of Connector Terminal Block 4 wire 2 6 Transmitter Mounting 2 6 1 Pura SEN Sample Block Optional Prior to installation of the transmitter unscrew and...

Page 14: ...the Pura transmitter stationary with a spanner wrench tighten the gas line nut 1 8 of a turn using a second spanner wrench NOTE Use the flats of the hexagonal nut and not the transmitter body 4 Fit t...

Page 15: ...VCR connections on either the Pura or the connecting gas lines Ensure that the Pura is offered into the gas line with reference to the gas flow direction and the inlet port as indicated on the Pura bo...

Page 16: ...The following procedure must be carried out by competent personnel 1 Ensure that the red protective cover has been removed from the tip of the transmitter WARNING Under no circumstances should the fil...

Page 17: ...e securing screw with the O ring and washer must be tightened to a minimum torque setting of 3 4 Nm 2 5 ft lbs The transmitter cable used must be a minimum diameter of 4 6mm 0 2 48 La nc as ter Way B...

Page 18: ...locity can damage the sensing element and similarly at low velocity they may blind the sensing element and reduce its response speed If particulate such as degraded desiccant pipe scale or rust is pre...

Page 19: ...ure content to ensure that the stated accuracy of the Pura is maintained Calibration services traceable to the UK National Physical Laboratory NPL and the US National Institute of Standards and Techno...

Page 20: ...tinuity damage Rectify replace cable Instrument failure Contact instrument supplier Current output is 4 mA constantly Transmitter desiccated Check gas source supply Transmitter contaminated Replace re...

Page 21: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual 14 97070 Issue 12 1 March 2016 APPENDIX A Appendix A Technical Specifications...

Page 22: ...t for ppmV Dew point Output Range 120 to 40 Cdp 184 to 40 Fdp Supply Voltage 12 to 28 V DC Load Resistance Max 250 12 V 500 24 V Max 300 12 V 900 24 V Current Consumption 23 mA Supply Voltage Influenc...

Page 23: ...Digital Transmitter User s Manual 16 97070 Issue 12 1 March 2016 APPENDIX A A 1 Dimensional Drawings Pura Transmitter SEN Figure 16 SEN Dimensional Drawing Pura OEM Pura Premium PRM Figure 17 OEM PRM...

Page 24: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual Michell Instruments 17 APPENDIX B Appendix B EC Declaration of Conformity...

Page 25: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual 18 97070 Issue 12 1 March 2016 APPENDIX B Appendix B EU Declaration of Conformity...

Page 26: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual Michell Instruments 19 APPENDIX C Appendix C Quality Recycling Warranty Information...

Page 27: ...of substances which may be harmful to the environment Similarly we are increasingly using recyclable and or recycled material in our business and products wherever it is practical to do so To protect...

Page 28: ...e RoHS2 EU Directive 2011 65 EU Article 3 24 defines Control and Monitoring Equipment specifically as monitoring and control instruments designed exclusively for industrial or professional use RoHS2 E...

Page 29: ...Instruments maintains a hazardous material register in which MSDS data sheets are collated and we will check that our suppliers will comply to REACH requirements for all materials and substances we us...

Page 30: ...ollowing courses of action will be taken If the fault is covered under the terms of the warranty the instrument will be repaired at no cost to the owner and returned If Michell Instruments determines...

Page 31: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual 24 97070 Issue 12 1 March 2016 APPENDIX D Appendix D Return Document Decontamination Declaration...

Page 32: ...Hazardous chemicals YES NO Radioactive substances YES NO Other hazards YES NO Please provide details of any hazardous materials used with this equipment as indicated above use continuation sheet if ne...

Page 33: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual 26 97070 Issue 12 1 March 2016 NOTES...

Page 34: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual Michell Instruments 27 NOTES...

Page 35: ...Pura 2 Wire 3 Wire Digital Transmitter User s Manual 28 97070 Issue 12 1 March 2016 NOTES...

Page 36: ...http www michell com...

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