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Summary of Contents for Michell Instruments SF52
- Page 1 SF52 Dew-Point Transmitter User’s Manual 97224 Issue 5 June 2017...
- 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 © 2015 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
Figure 2 Voltage 3-Wire Connections .................3 Figure 3 mA 3-Wire Connections ................3 Figure 4 Maximum Load of SF52 3-Wire mA - Including Cable Resistance ....3 Figure 5 Transmitter Mounting ..................5 Figure 6 Transmitter Mounting - Pipe or Duct.............6 Figure 7 Installation Location ...................7... -
Page 5: Safety
Repair and Maintenance The instrument must be maintained either by the manufacturer or an accredited service agent. Refer to www.michell.com for details of Michell Instruments’ worldwide offi ces contact information. Calibration The recommended calibration interval for this instrument is 12 months. The instrument should be returned to the manufacturer, Michell Instruments Benelux BV, for re-calibration. -
Page 6: Abbreviations
SF52 User’s Manual Abbreviations The following abbreviations are used in this manual: pressure unit (=100 kP or 0.987 atm) °C degrees Celsius °F degrees Fahrenheit direct current Dew point grams grams per cubic meter gr/ft grains per cubic foot meter(s) -
Page 7: Introduction
• Voltage or mA outputs The SF52 is available with a voltage output (0 to 1 V, 0 to 5 V, 0 to 10 V) or a current output (4 - 20 mA 3 wire). The current output has a 3 point diagnostic option:... -
Page 8: Installation
Certifi cate of calibration • Quick Start Guide NOTE: If any component is not present, contact Michell Instruments immediately. NOTE: Do not touch the fi lter disc at the front of the SF52. Figure 1 SF52 97224 Issue 5, June 2017... -
Page 9: Electrical Schematic
8 to 30 V for 4 - 20 mA output Yellow (do not use) 20 mA Brown mA 3-Wire Connections Figure 3 2.2.1 Electrical Boundaries mA 3-Wire 1000 Figure 4 Maximum Load of SF52 3-Wire mA - Including Cable Resistance Michell Instruments... -
Page 10: Transmitter Mounting
fi lter disc). The SF52 can be mounted either into a fl ow-through sensor sampling block (optional) or directly into a pipe or duct. It can be operated at pressures of up to 2 MPa (20 barg / 290 psig) when fi... -
Page 11: Transmitter Mounting - Sample Block (Optional)
Screw the transmitter (1) into the sample block (3) and tighten to the appropriate torque setting (see Section 2.3). NOTE: Use the fl ats of the hexagonal body tube and not the sensor body. Connect the SF52 TPE cable wiring connections into the electrical system. Figure 5 Transmitter Mounting... -
Page 12: Transmitter Mounting - Direct Pipeline Connection
SF52 User’s Manual INSTALLATION 2.3.2 Transmitter Mounting - Direct Pipeline Connection The transmitter may be directly mounted into a pipe or duct as shown in Figure 6. Caution: Do not mount the transmitter too close to the bottom of a bend where any condensate in the pipeline might collect and saturate the probe. -
Page 13: 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 14: Maintenance
MAINTENANCE Calibration Routine maintenance of the SF52 is confi ned to regular re-calibration by exposure of the transmitter to sample gases of known moisture content to ensure that the stated accuracy 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. -
Page 15: Appendix A Technical Specifi Cations
SF52 User’s Manual APPENDIX A Appendix A Technical Specifi cations Michell Instruments... -
Page 16: Dimensions
SF52 User’s Manual APPENDIX A Appendix A Technical Specifi cations Performance Measurement Range -40 to +60°Cdp (-40 to +140°Fdp) Accuracy ±2°Cdp (±3.6°Fdp) Repeatability 0.5°Cdp (0.9°Fdp) Stability <1°C / year (<1.8°F / year) Accuracy (absolute humidity) 0.4 to 3 g/m on value of absolute humidity Calibration Traceable 3-point calibration certifi... -
Page 17: Figure 9 Dimensions - Sf52
SF52 User’s Manual APPENDIX A Dimensions G1/2” BSP bonded seal Ø28.65 x 2.61mm (Ø1.12 x 0.10”) Dimensions - SF52 Figure 9 35.0 26.8 M24 x 1.5-7H 19.5 19.0 (LOOSE FIT) TAP 1/4" BSP TAP 1/8" BSP 14.3 2 OFF TAP M6 x 5 FTD TAP 1/2"... -
Page 18: Appendix B Quality, Recycling & Warranty Information
SF52 User’s Manual APPENDIX B Appendix B Quality, Recycling & Warranty Information 97224 Issue 5, June 2017... - Page 19 SF52 User’s Manual APPENDIX B Appendix B 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: •...
- Page 20 SF52 User’s Manual APPENDIX C Appendix C Recommended Practices in Humidity Measurement 97224 Issue 5, June 2017...
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Page 21: Appendix C Recommended Practices In Humidity Measurements
• Follow Michell Instruments’ care instructions for the instrument. Some instruments need routine cleaning or other maintenance. Before using any solvent cleaner, check with Michell Instruments that this will not harm the sensor or other materials of construction. • Wherever possible, ensure that hygrometers are calibrated under the conditions of use, i.e. - Page 22 SF52 User’s Manual APPENDIX C • Cleanliness of the environment will affect different hygrometers in different ways. Dust and airborne droplets should be avoided or fi ltered out if possible. Contaminants can come from the most surprising sources, ordinary urban pollution, for example.
- Page 23 SF52 User’s Manual APPENDIX C Dew point in general • The measuring environment and all parts of the sampling pathway must be kept above the dew point if condensation is to be avoided. Electrical trace heating or other heating methods should be used if necessary. An excess temperature of 10°C above the dew point is usually a safe margin.
- Page 24 SF52 User’s Manual APPENDIX C • Clean environments are always best for humidity measurements, but this is especially critical at very low humidity. Even fi ngerprints harbour water. High purity cleaning agents are recommended: Analytical Reagent (AR) quality solvents for oil-based contaminants, and purifi ed water (distilled or de-ionised) for salts.
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Page 25: Appendix D Return Document & Decontamination Declaration
SF52 User’s Manual APPENDIX D Appendix D Return Document & Decontamination Declaration Michell Instruments... - Page 26 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 27 Laboratory Use Part 1: General Requirements Robert-Jan Pouw RH Business Manager. Michell Instruments Benelux B.V. Oosterhout The Netherlands Date of Issue 6 December 2017 ___________________________________ on behalf of Peter Haakma Managing Director Michell Instruments Benelux B.V. EUD SF52 Issue 05...
- Page 28 http://www.michell.com...
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