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Summary of Contents for Michell Instruments SF82 Series
- Page 1 SF82 Dew-Point Transmitter User’s Manual 97576 Issue 1 June 2019 nbn Austria GmbH...
- Page 2 Please fill out the form(s) below for each analyzer that has been purchased. Use this information when contacting Michell Instruments for service purposes. Analyzer Code Serial Number Invoice Date Location of Analyzer Tag No Analyzer Code Serial Number Invoice Date...
- Page 3 © 2019 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
2.4. Electrical Schematic ....................5 2.4.1. Electrical Boundaries ................... 6 2.4.2. Digital Communications (M12 Version Only) ............6 2.5. Transmitter Installatiom .................... 6 2.5.1. Sampling Considerations ..................6 2.5.2. Good Measuring Practice ..................9 2.5.3. Transmitter Mounting ..................12 Michell Instruments... - Page 5 SF82 Transmitter User’s Manual APPENDICES Appendix A ....................... 16 Technical Specifications ....................17 Product Dimensions ...................... 19 Appendix B ....................... 22 Quality, Recycling & Warranty Information ..............23 Appendix C ....................... 24 Return Document & Decontamination Declaration ............25 Appendix D ....................... 26 Modbus Register Map ....................
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Page 6: Safety
This instrument is designed to be electrically safe when used with the options and accessories supplied by Michell Instruments for use with it. This instrument has been independently verified as complying with the IEC/EN 61010 Standard for Electrical Safety for Europe and for the equivalent 61010 standards in use in N. -
Page 7: Safety Conformity
SF82 Transmitter User’s Manual Safety Conformity This product meets the essential protection requirements of the relevant EU and US standards and directives. Abbreviations The following abbreviations are used in this manual: barg pressure unit (=100 kP or 0.987 atm) (bar gauge) ºC degrees Celsius ºF... -
Page 8: Introduction
SF82 Transmitter User’s Manual 1. INTRODUCTION The Michell Instruments SF82 is a loop-powered dew-point transmitter, designed to make dew point measurements in a flowing sample. The SF82 transmitter is available with 3 different process connections: • 5/8” - 18 UNF •... -
Page 9: Installation
SF82 Transmitter User’s Manual 2. INSTALLATION 2.1. Unpacking the Instrument On delivery, please check that all the following standard components are in the packing box: • SF82 Transmitter • Certificate of Calibration • Connector (for sensor/cable) for MiniDIN 43650 C version only It is recommended that all packaging is retained, in case products are returned for service or calibration. -
Page 10: Preparation Of The Sensor Cable
2.2. Preparation of the Sensor Cable The sensor cable is NOT supplied as standard. Cables can be obtained by contacting your local Michell Instruments representative (see www.michell.com for details). DIN 43650 Version Cable connections to the SF82 transmitter are 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 11: Figure 3 Sensor Connector Installation
(see figure 3) before the power is applied. Without this connection, the transmitter may be damaged if allowed to operate for prolonged periods. M12 5-Pin Version Cables with moulded M12 connectors are available from Michell Instruments in the following lengths: • 0.8 m • 2 m •... -
Page 12: Cable Connection
If longer cable runs are required, off the shelf 5-pin M12 cables can be connected between the SF82 transmitter and the cable provided by Michell Instruments. Note: The cable screen should only be connected to ground point at either the transmitter installation side or at the receiving equipment. -
Page 13: Electrical Boundaries
SF82 Transmitter User’s Manual 2.4.1. Electrical Boundaries Figure 7 Maximum Load of SF82 - Including Cable Resistance 2.4.2. Digital Communications (M12 Version Only) Modbus RTU over RS485 communication is available on the SF82 M12, and can be used simultaneously with the 2-wire current output. Section 2.2 describes the electrical connections to the transmitter. -
Page 14: Figure 8 Installation Location
Figure 8 Installation Location If the transmitter is to be mounted directly into a pipe or duct, then consider that the installation point should not be too close to the bottom of a bend where oil or other condensate may collect. Michell Instruments... -
Page 15: Figure 9 Installation Location
SF82 Transmitter User’s Manual Figure 9 Installation Location 2. Gas speed – if you are planning on installing the sensor in a duct, consider how fast the sample gas is moving through it. • If the gas speed is very low, or occasionally static, then the moisture content through the length (and width, if it is more than a few cm across) of the duct is unlikely to be uniform. -
Page 16: Good Measuring Practice
If the partial water vapour pressure exerted on the outside of a compressed air line is higher than on the inside, the atmospheric water vapour will naturally push through the porous medium causing water to migrate into the pressurised air line. This effect is called transpiration. Michell Instruments... - Page 17 SF82 Transmitter User’s Manual What this demonstrates is the dramatic effect that different tubing materials have on the humidity levels of a gas passed through them. Many materials contain moisture as part of their structure and when these are used as tubing for a dry gas the gas will absorb some of the moisture. Always avoid using organic materials (e.g.
- Page 18 Over a long tubing run, water will inevitably migrate into any line, and the effects of adsorption and desorption will become more apparent. Michell Instruments...
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Page 19: Transmitter Mounting
SF82 Transmitter User’s Manual Dead volumes (areas which are not in a direct flow path) in sample lines, hold onto water molecules which are slowly released into the passing gas. This results in increased purge and response times, and wetter than expected readings. Hygroscopic materials in filters, valves (e.g. rubber from pressure regulators) or any other parts of the system can also trap moisture. - Page 20 4. Screw the transmitter into the sampling location or sample block by hand using the wrench flats only. DO NOT grip and twist the sensor cover when installing the sensor. 5. When installed, fully tighten using a wrench to a torque setting of 30.5 Nm (22.5 ft-lbs) Michell Instruments...
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Page 21: Figure 13 Transmitter Mounting With Adapter
SF82 Transmitter User’s Manual Installation using Additional Thread Adaptor 1. Remove the protective cover and desiccant capsule from the transmitter and retain for future 2. Prevent any contamination of the sensor before installation by handling the transmitter by the main body only, avoiding contact with the sensor guard. 3. - Page 22 UK National Physical Laboratory (NPL) and the US National Institute of Standards and Technology (NIST) are provided by Michell Instruments. Michell Instruments offers a variety of re-calibration and exchange sensor schemes to suit specific needs. A Michell representative can provide detailed, custom advice (for Michell Instruments’...
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Page 23: Appendices
SF82 Transmitter User’s Manual APPENDIX A Technical Specifications 97576 Issue 1, June 2019... -
Page 24: Technical Specifications
Analog only 23 mA max, Current consumption 23 mA max digital only 6 mA max IEC61010-1, UL61010-1 & IEC61010-1, UL61010-1 & CAN/CSA C22.2 No. 61010 Electrical Safety CAN/CSA C22.2 No. 61010 EN61373 Rail Rolling Stock EN50121-3-2 Rail EMC/RFI Michell Instruments... - Page 25 SF82 Transmitter User’s Manual Operating Specifications Operating temperature -20 °C to +60 °C Compensated temperature -20 °C to +50 °C range Storage Temperature -40 °C to +60 °C Maximum Operating 10 MPag (100 barg) maximum Pressure Pressure Safety Rating 45 MPag (450 barg) maximum 1 to 5 Nl/min mounted in standard sampling block;...
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Page 26: Product Dimensions
SF82 Transmitter User’s Manual Product Dimensions M12, 5/8” UNF M12, G1/2 M12, 3/4" UNF Michell Instruments... - Page 27 SF82 Transmitter User’s Manual MiniDIN, 5/8” UNF MiniDIN, G1/2 MiniDIN, 3/4” UNF 97576 Issue 1, June 2019...
- Page 28 SF82 Transmitter User’s Manual G1/2 5/8” UNF 3/4” UNF Quick Connect Michell Instruments...
- Page 29 SF82 Transmitter User’s Manual APPENDIX B Quality, Recycling & Warranty Information 97576 Issue 1, June 2019...
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Page 30: Quality, Recycling & Warranty Information
SF82 Transmitter User’s Manual Quality, Recycling & Warranty Information Michell Instruments is dedicated to complying to all relevant legislation and directives. Full information can be found on our website at: www.michell.com/compliance This page contains information on the following directives: • ATEX Directive •... - Page 31 SF82 Transmitter User’s Manual APPENDIX C Return Document & Contamination Declaration 97576 Issue 1, June 2019...
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Page 32: Return Document & Decontamination Declaration
SF82 Transmitter User’s Manual Return Document & Decontamination Declaration Michell Instruments... - Page 33 SF82 Transmitter User’s Manual APPENDIX D Modbus Register Map 97576 Issue 1, June 2019...
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Page 34: Modbus Register Map
Modbus protocol. Full descriptions of the function codes (FC03/FC06/FC16) can be found in the sidebar. https://www.scadacore.com/tools/programming- calculators/online-hex-converter/ is an excellent resource for determining register types/byte order issues in raw received Modbus data. Michell Instruments... -
Page 35: Register Address
SF82 Transmitter User’s Manual Register Address Access Data Description Comment Type Instrument Modbus uint16 Address uint16 Instrument ID Batch 0xA123 Serial 0x0001 uint16 Sensor Batch Number Complete sensor serial would be A123-001 uint16 Sensor Serial Number uint16 Firmware Version Divide by 1000, ie 12003 = V12.003 uint16 Register Map Version Divide by 1000, ie 12003 = V12.003... - Page 36 2 = High Alarm (23ma) Range Output 3 = Minimum Scale (4ma) uint16 Analogue Output, Dew- 4 = Maximum Scale (20ma) Point Sensor Fault 5 = Namur Low Alarm (3.7ma) uint16 Analogue Output, 6 = Namur High Alarm (20.5ma) Temperature Sensor Fault Michell Instruments...
- Page 37 SF82 Transmitter User’s Manual Parameter Ranges Dew Point -150 Temperature -150 ppmV 30000 97576 Issue 1, June 2019...
- Page 38 http://www.michell.com Aufgrund laufender Weiterentwicklungen sind Änderungen der Spezifikationen vorbehalten. Alle Angaben vorbehaltlich Satz- und Druckfehler. nbn Austria GmbH Riesstraße 146, 8010 Graz Tel. +43 316 40 28 05 | Fax +43 316 40 25 06 nbn @ nbn. at | www. nbn. at...
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