Related Manuals for Michell Instruments MDM25
Summary of Contents for Michell Instruments MDM25
- Page 1 MDM25 Hygrometer User’s Manual 53.1% 21.0°C Abs H MDM25 Hygrometer 97234 Issue 4 January 2018...
- 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 © 2018 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
Display Settings ....................4 Device Settings ....................4 About ........................ 4 INSTALLATION ....................5 Unpacking the Instrument ................... 5 MDM25 Accessories .................... 5 Battery Requirements ..................6 2.3.1 Fitting the Batteries ..................6 Mounting and Connecting the Probe ..............7 OPERATION ......................8 Preparation for Operation .................. - Page 5 MDM25 User’s Manual Figures Figure 1 Controls and Indicators ................2 Figure 2 Display ......................3 Figure 3 Battery Compartment Location ..............6 Figure 4 Probe Connections ..................7 Figure 5 Main Menu Structure ..................8 Figure 6 Display Settings Menu .................9 Figure 7 Device Settings Menu ................10 Figure 8 About Menu .....................11...
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Page 6: 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 An annual calibration is recommended for the RH probe. This should be returned to the manufacturer, Michell Instruments, or one of their accredited service agents for re-calibration. -
Page 7: Abbreviations
MDM25 User’s Manual Abbreviations The following abbreviations are used in this manual: Abs H absolute humidity ºC degrees Celsius ºF degrees Fahrenheit liquid crystal display grams grams per cubic meter pound millimeters ounce relative humidity second(s) temperature ambient temperature dew point... -
Page 8: Introduction
(g/m ), dew point and wet bulb temperature, the MDM25 is suitable for spot-checking humidity in a wide variety of applications. The hygrometer is contained within a molded ABS housing with a rubber surround for drop protection - sealed to IP54 standards. -
Page 9: Description
The controls and indicators associated with the MDM25 hygrometer are located on the front panel. The probe connection to the MDM25 hygrometer is made to the top panel, and the battery charger cover is located on the rear of the instrument. -
Page 10: Instrument Display
MDM25 User’s Manual INTRODUCTION 1.1.2 Instrument Display 53.1% 21.0°C Abs H Battery Charge Indicator Icon - displays 3 dots when full. When battery icon is empty, replace the batteries. RH Display Temperature Display 3rd Output Display - presents the selected 3rd output, either in ºC / ºF Td, g/m... -
Page 11: Display Units
MDM25 User’s Manual INTRODUCTION Display Units The MDM25 measures relative humidity and temperature. The third output, when displayed, is calculated from these two parameters. The table below gives a description of all available units. Signal Symbol Units Description The ratio of water vapor pressure to the... -
Page 12: Installation
MDM25 User’s Manual INSTALLATION INSTALLATION Unpacking the Instrument Open the box carefully and unpack the contents. Check that the following items are included. Report any shortages immediately. • MDM25 Hygrometer • 3 off Alkaline ‘AA’ cells • User Manual •... -
Page 13: Battery Requirements
MDM25 User’s Manual INSTALLATION Battery Requirements The MDM25 is supplied with 3 Alkaline ‘AA’ size cells. These non-rechargeable Alkaline cells have a high energy density and long shelf-life. Do not mix different type of batteries. All three batteries must be of the same type. -
Page 14: Mounting And Connecting The Probe
INSTALLATION Mounting and Connecting the Probe All probes insert directly into the connector on the top of the MDM25. Align the locating peg with the locating notch and then rotate the knurled thumb wheel until the probe is securely held in place. -
Page 15: Operation
%RH and ambient temperature (Ta). If using the MDM25 alongside the S503 RH calibrator, adjust the display orientation to allow for the product to be read correctly when upside down. If there is there is no reading on the screen check the battery orientation. Replace with new batteries if required. -
Page 16: Display Settings
MDM25 User’s Manual OPERATION 3.2.1 Display Settings DISPLAY Press DISPLAY ORIENTATION BACKLIGHT CONTRAST Press Press Press Set the brightness Set the contrast for The orientation of the backlight by the display settings of the display Special feature: pressing the Up... -
Page 17: Device Settings
MDM25 User’s Manual OPERATION 3.2.2 Device Settings DEVICE Press TEMP UNITS AUTO OFF 3RD VALUE Press Press Press By pressing the Up To save battery life the By pressing the Up and Down Keys Auto Off automatically and Down Keys the... -
Page 18: About
MDM25 User’s Manual OPERATION 3.2.3 About ABOUT Press FIRMWARE VERSION Press View the firmware version and serial number of the hand meter. This number relates to the hand held unit ONLY, not the attached probe Press the Menu button to return to the Main page. -
Page 19: Maintenance
MDM25 User’s Manual MAINTENANCE MAINTENANCE The MDM25 is designed to operate either in static ambient conditions, or in a fl owing gas stream. The sensors are designed to have excellent performance in ambient conditions. Therefore, a fl ow is not necessary to ensure that the probe is reacting rapidly to changes in measured conditions. - Page 20 MDM25 User’s Manual APPENDIX A Appendix A Technical Specifi cations Michell Instruments...
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Page 21: Appendix A Technical Specifi Cations
MDM25 User’s Manual APPENDIX A Appendix A Technical Specifi cations HYGROMETER Performance Measurement Units %RH, ºC / ºF Ta, ºC / ºF Td, g/m , ºC / ºF Tw Mechanical Specifi cation Ingress Protection IP54 Hygrometer Housing Material Molded polymer housing ABS + rubber surround Weight 300g (10.58oz) - Page 22 MDM25 User’s Manual APPENDIX B Appendix B Quality, Recycling & Warranty Information Michell Instruments...
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Page 23: Appendix B Quality, Recycling & Warranty Information
MDM25 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 24 MDM25 User’s Manual APPENDIX C Appendix C Analyzer Return Document & Decontamination Declaration Michell Instruments...
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Page 25: Appendix C Analyzer 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 27 Degrees of Protection Provided by Enclosures. Ingress Rating equivalent to IP54 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 MDM25 Issue 04...
- Page 28 http://www.michell.com...
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