Michell Instruments MDM300 User Manual
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Michell Instruments MDM300 User Manual

Sampling system
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MDM300
Sampling System
User's Manual
97232 Issue 1.4
October 2016

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Summary of Contents for Michell Instruments MDM300

  • Page 1 MDM300 Sampling System User’s Manual 97232 Issue 1.4 October 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. Instrument Code Serial Number Invoice Date Location of Instrument Tag No Instrument 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.

  • Page 4: Table Of Contents

    Panel-Mount Sampling System and Flight Case ..........1 Figure 2 Gas Port Adaptors ..................3 Figure 3 MDM300 Positioning ...................3 Figure 4 MDM300 Inlet and Outlet Port Connection ............4 Figure 5 Mounting Posts ...................4 Figure 6 Port Connection Tightening .................4 Figure 7 Controls, Indicators and Connectors .............5...
  • Page 5 MDM300 Sampling System User’s Manual Tables Table 1 Controls, Indicators and Connectors ..............5 Appendices Appendix A Technical Specifi cations ................13 Appendix B Quality, Recycling & Warranty Information ........... 15 Pressure Equipment Directive (PED) 97/23/EC ....... 15 Recycling Policy ................15 WEEE Compliance ................

  • Page 6: Safety

    Michell Instruments’ worldwide offi ces contact information Calibration The recommended calibration interval for the MDM300 Hygrometer is 12 months. The instrument should be returned to the manufacturer, Michell Instruments, or one of their accredited service agents for recalibration.

  • Page 7: Abbreviations

    MDM300 Sampling System User’s Manual Abbreviations The following abbreviations are used in this manual: alternating current barg pressure unit (=100 kP or 0.987 atm) gauge ºC degrees Celsius ºF degrees Fahrenheit Nl/min liters per minute kilogram(s) pound(s) millimeters “ inch(es)

  • Page 8: Introduction

    INTRODUCTION The MDM300 panel-mount sampling system offers a complete package for conditioning of a sample, prior to measurement with an MDM300 or MDM300 I.S. It is contained within an optional fl ight case which allows easy transport of everything required to make the measurements. The anti-static construction of the case makes it suitable for use in hazardous areas.

  • Page 9: Installation

    MDM300 Sampling System User’s Manual INSTALLATION INSTALLATION Safety It is essential that the installation of the electrical and gas supplies to this instrument be undertaken by qualifi ed personnel. Unpacking the Instrument The shipping box will contain the following: •...

  • Page 10: Preparing The Sampling System For Operation

    INSTALLATION Preparing the Sampling System for Operation To prepare the system for operation, it is necessary to install the MDM300 into the sampling system as follows: Wrap PTFE tape (not supplied), around the ends of the 1/8” NPT to 1/8”...

  • Page 11: Figure 4 Mdm300 Inlet And Outlet Port Connection

    MDM300 Sampling System User’s Manual INSTALLATION Connect the coiled tubes to the inlet and outlet of the MDM300. Ensure that the 1/8” Swagelok nuts are fi nger tight. ® Figure 4 MDM300 Inlet and Outlet Port Connection Secure the instrument to the mounting posts using the supplied 2.5mm hex bolts and allen key.

  • Page 12: Controls, Indicators And Connectors

    MDM300 Sampling System User’s Manual INSTALLATION Controls, Indicators and Connectors MDM300 I.S. SAMPLE VENT Sampling System MDM300-IS SAMPLING PRESSURE GAUGE SYSTEM (PG1) NEEDLE VALVE (NV2) lbf/in FLOWMETER (FM1) OPTIMAL FLOW 0.2 - 0.5 L/MIN NEEDLE VALVE (NV1) BYPASS VENT - I.S.

  • Page 13: Operation

    Connect an instrument to the sample gas as detailed in Section 3.1. Fully open the isolation valve. Refer to the Operation Guide section in the relevant MDM300 user’s manual for condition specifi c instructions on operation. Depending on the sample pressure it may be necessary to use the bypass fl...

  • Page 14: Sampling Hints

    MDM300 Sampling System User’s Manual OPERATION Sampling Hints Measurement of moisture content is a complex subject, but does not need to be diffi cult. This section aims to explain the common mistakes made in measurement situations, the causes of the problem, and how to avoid them. Mistakes and bad practices can cause the measurement to vary from the expectation;...
  • Page 15 MDM300 Sampling System User’s Manual OPERATION Sample Tubing Length The sample point should always be as close to the critical measurement point as possible, in order to obtain a truly representative measurement. The length of the sample line to the sensor or instrument should be as short as possible. Interconnection points and valves trap moisture, so using the simplest sampling arrangement possible will reduce the time it takes for the sample system to dry out when purged with dry gas.
  • Page 16 MDM300 Sampling System User’s Manual OPERATION Flow Rates Theoretically fl ow rate has no direct effect on the measured moisture content, but in practice it can have unanticipated effects on response speed and accuracy. The optimal fl ow rate varies depending on the measurement technology.

  • Page 17: Maintenance

    It is imperative that all fi lters are replaced before they become saturated. If a fi lter element becomes saturated with contaminants there is a possibility that the performance of the fi lter will be reduced, and contamination of the MDM300 sensor could occur. Before attempting to replace the fi lter always disconnect the Sampling System from the sample gas and ensure that the system is depressurized.

  • Page 18: Figure 10 Glycol Absorption Cartridge Removal

    MDM300 Sampling System User’s Manual MAINTENANCE Unscrew and remove the fi lter bowl and then the fi lter element. NOTE: the fi lter bowl is sealed with an O-ring. Discard the old used fi lter element and replace with a new fi lter element...
  • Page 19 MDM300 Sampling System User’s Manual APPENDIX A Appendix A Technical Specifi cations 97232 Issue 1.4, October 2016...

  • Page 20: Appendix A Technical Specifi Cations

    Medium pressure: 110 barg (1595 psig) High pressure: 340 barg (4931 psig) MDM300 0.2 to 1.2 Nl/min (0.4 to 2.54 scfh) Flow Rate MDM300 I.S. 0.2 to 0.5 Nl/min (0.4 to 1.1 scfh) Gas Wetted Materials 316 stainless steel Depending on model:...
  • Page 21 MDM300 Sampling System User’s Manual APPENDIX B Appendix B Quality, Recycling & Warranty Information 97232 Issue 1.4, October 2016...

  • Page 22: Appendix B 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 23: 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 24: 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 25: Return Policy

    MDM300 Sampling System User’s Manual APPENDIX B 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 26 MDM300 Sampling System User’s Manual APPENDIX C Appendix C Return Document & Decontamination Declaration Michell Instruments...

  • Page 27: Appendix C 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 28 http://www.michell.com...

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