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Summary of Contents for Michell Instruments Pura 2-Wire
- Page 1 Pura Trace Moisture 2-Wire / 3-Wire / Digital Transmitter User’s Manual 97070 Issue 12.1 March 2016...
- Page 2 Please fi ll out the form(s) below for each instrument that has been purchased. Use this information when contacting Michell Instruments for service purposes. Transmitter Code Serial Number Invoice Date Location of Instrument Tag No Transmitter Code Serial Number Invoice Date...
- Page 3 © 2016 Michell Instruments This document is the property of Michell Instruments Ltd. and may not be copied or otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd.
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Page 4: Table Of Contents
Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual Contents Safety ..........................vi Electrical Safety ......................vi UL Approval .........................vi Pressure Safety ......................vi Toxic Materials ......................vi Repair and Maintenance ....................vi Calibration ........................vi Safety Conformity ......................vi Abbreviations ........................vii Warnings ........................... vii INTRODUCTION ....................1 Features ......................1 INSTALLATION ....................2... - Page 5 Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual Figures Figure 1 Transmitter Unpacking Method ..............3 Figure 2 Unpacking - Pura OEM & PREMIUM (PRM) - Single / Double Bag ....3 Figure 3 Pura SEN ....................4 Figure 4 Pura OEM, PRM ..................4 Figure 5 Connector Terminal Block Removal ..............5...
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Page 6: Safety
Michell Instruments can offer a variety of re-calibration and exchange transmitter schemes to suit your specifi c needs. Your local representative will be pleased to provide detailed, custom advice. -
Page 7: Abbreviations
Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual Abbreviations The following abbreviations are used in this manual: barg bar gauge °C degrees Celsius °F degrees Fahrenheit dew point direct current feet per second μm micro-meter Nl/min normal liters per minute milliampere megapascal m/sec... -
Page 8: Introduction
If there are any questions about the transmitter or how to install it, not detailed in this Manual, contact your local representative. Refer to www.michell.com for details of Michell Instruments’ worldwide offi ces’ contact information. Features The Pura Series are a continuous, on-line, 4-20 mA/digital transmitter family for the measurement of moisture content in air and other non-corrosive gases. -
Page 9: Installation
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual INSTALLATION Unpacking the Instrument On delivery, check that all the following standard components are present in the packing box: Pura SEN (transmitter, no block version) 2-wire 3-wire Digital Transmitter Calibration Certifi cate ... -
Page 10: Unpacking The Pura Sen
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual Unpacking the Pura SEN Unpack the dew-point transmitter packing tube as follows (see Figure 1). Figure 1 Transmitter Unpacking Method Unscrew the cap (1) from the packing tube (8). Remove the foam block (3) containing the connector (2). -
Page 11: Pura Sen
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual Pura SEN NOTE: For environmental and operating conditions, refer to Appendix A, Technical Specifi cations. Electrical connector Transmitter cover Transmitter label Hexagonal nut Process connection (½” VCR) Sensing element Figure 3 Pura SEN Pura OEM, PRM NOTE: For environmental and operating conditions refer to Appendix A, Technical Specifi... -
Page 12: Preparation Of The Transmitter Cable
Preparation of the Transmitter Cable The transmitter cable is NOT supplied as standard. A cable can be obtained by contacting your local distributor or Michell Instruments (see www.michell.com for details). Cable connection to the Pura transmitter is made via the removable connector. Removing the central screw enables the connector terminal block to be removed from the outer housing by using a small screwdriver to prise it clear. -
Page 13: Transmitter Mounting
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual 3-wire 4-20 mA (Source) PIN 1 PIN 3 (GND) GROUND (System 0 V) Power (+12 V to +24 V) and Cable Screen Figure 8 Rear of Connector Terminal Block - 3-wire 4-wire Digital String... -
Page 14: Figure 10 Sensor Block Connection
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual The following procedure must be carried out by a qualifi ed installation engineer. To mount the transmitter into the sensor block (preferred method), proceed as follows (see Figure 10) : Remove the red protective cover (2) from the tip of the transmitter (1). -
Page 15: Pura Oem & Prm Connection
The Pura OEM and PRM have been assembled and packaged within a Class 100 clean- room environment. To maintain this level of cleanliness the packaging should only be opened within the same, or cleaner, environment. Michell Instruments recommends the use of Swagelok retained gasket assemblies, ®... -
Page 16: Pura Sen - Direct Pipeline Connection
Tighten enough to obtain a gas tight seal. (Torque will depend upon the pipeline material.) Michell Instruments recommends the use of Swagelok retained gasket assemblies, ® containing silver plated, stainless steel ½” VCR gaskets, when connecting the Pura into a gas line. -
Page 17: Transmitter Cable Connection
Pura 2-Wire/3-Wire/Digital Transmitter INSTALLATION User’s Manual 2.6.4 Transmitter Cable Connection When installing the connector, and to ensure that full ingress protection is achieved, the 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”). -
Page 18: Operation
fi lter, as a minimum level of protection. For more demanding applications Michell Instruments offers a range of sampling systems (for more information contact www.michell.com). -
Page 19: Maintenance
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 specifi c needs. A Michell representative can provide detailed, custom advice (for Michell Instruments’ contact information go to www.michell.com). -
Page 20: Fault Conditions
Pura 2-Wire/3-Wire/Digital Transmitter FAULT CONDITIONS User’s Manual FAULT CONDITIONS 2-wire & 3-wire 4-20 mA Output Only Message Cause Action Displayed Check power supply to transmitter Check transmitter cable for Power failure Current output is continuity/damage 0 mA constantly Rectify/replace cable... - Page 21 Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX A User’s Manual Appendix A Technical Specifi cations 97070 Issue 12.1, March 2016...
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Page 22: Appendix A Technical Specifi Cations
Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX A User’s Manual Appendix A Technical Specifi cations Performance Specifi cations Pura 3-Wire / Pura 2-Wire Digital Transmitter Measurement Range (dp) -120 to -40°C (-184 to -40°F) dew point ±1°C from -40 to -60°C (-40 to -76°F) Accuracy (dp) ±2°C from -60 to -100°C (-76 to -148°F) -
Page 23: Figure 16 Sen Dimensional Drawing
Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX A User’s Manual Dimensional Drawings Pura Transmitter (SEN) Figure 16 SEN Dimensional Drawing Pura OEM & Pura Premium (PRM) Figure 17 OEM & PRM Dimensional Drawing 97070 Issue 12.1, March 2016... - Page 24 Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX B User’s Manual Appendix B EC Declaration of Conformity Michell Instruments...
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Page 25: Appendix Beu Declaration Of Conformity
Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX B User’s Manual Appendix B EU Declaration of Conformity 97070 Issue 12.1, March 2016... - Page 26 Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX C User’s Manual Appendix C Quality, Recycling & Warranty Information Michell Instruments...
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Page 27: Appendix C Quality, Recycling & Warranty Information
The directives’ aim is to reduce the impact that electronic devices have on the environment. Michell Instruments is in full compliance with the WEEE Directive and is registered with an approved recycler (Registration No. WEE/JB0235YW) and treats the requirement of the directive and the protection of the environment with the utmost importance. -
Page 28: Rohs2 Compliance
Equipment product sold into the EU market place as 22nd July 2017. However, the careful design policy of all Michell Instruments’ products continues to attain compliance in the shortest practical timescales and strives to ensure that less than 0.1% of total mass per product, of all non-compliant materials, appear within them. -
Page 29: Reach Compliance
Our continued review of the SVHC Candidate List and latest additions is to ensure we remain compliant. Michell 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 use in the processes of our manufacturing. -
Page 30: Return Policy
APPENDIX C User’s Manual Return Policy If a Michell Instruments’ product malfunctions within the warranty period, the following procedure must be completed: Notify a Michell Instruments’ distributor, giving full details of the problem, the model variant and the serial number of the product. - Page 31 Pura 2-Wire/3-Wire/Digital Transmitter APPENDIX D User’s Manual Appendix D Return Document & Decontamination Declaration 97070 Issue 12.1, March 2016...
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Page 32: Appendix D Return Document & Decontamination Declaration
Has the equipment been cleaned and decontaminated? NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous Work will not be carried out on any unit that does not have a completed decontamination declaration. - Page 33 Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual NOTES: 97070 Issue 12.1, March 2016...
- Page 34 Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual NOTES: Michell Instruments...
- Page 35 Pura 2-Wire/3-Wire/Digital Transmitter User’s Manual NOTES: 97070 Issue 12.1, March 2016...
- Page 36 http://www.michell.com...
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