MF300B+ manual - Diverse Technologies
Contents
1. 72 Tesla is required Magnetic probes such as gauss meters which measure the magnetic field in the air above the surface of the component do not indicate the value of magnetic flux within the material to be inspected The MF300B measures the peak static magnetic flux density regardless of the magnetisation technique Therefore the component can be magnetised using AC or DC electric current magnetisation coils and yokes or permanent magnets and the probe will measure the correct peak value However the correct measurement mode must be selected depending on whether the field being measured is AC or DC see Section 4 in Operation Page 5 www diverse technologies net First time The MF300B Magnetic Flux Meter is calibrated a few days before delivery and a calibration certificate is supplied The unit requires 4 AA cells which should be installed in the battery compartment on the rear of the housing The Flux probe supplied with the meter is of a robust design suitable for the measurement of magnetic fields in workshops and laboratories The probe will however be damaged if it is subject to mechanical stresses or forces If you have chosen the serial interface version you should install the software on your PC To download the serial software go to our website at http www diverse technologies net software setupserial exe The serial software option can be extracted by clicking on Extract You will b2. product is classed as Electrical and Electronic Equipment and should not be disposed with other household or commercial waste at the end of its working life The Waste of Electrical and Electronic Equipment WEEE directive 2002 96 EC has been put in place in the EU to recycle products using the best recovery and recycling techniques to minimise the impact on the environment treat any hazardous substances and avoid landfill Business users should ensure that this product is not mixed with other commercial waste for disposal Page 16
3. Range 0 1 99T Resolution 10mT Zero Zeroed at the start of every measurement and actively between measurements Surface The probe can monitor the magnetic flux within flat surfaces or curved surfaces with a radius as small as 50 mm Probe Stainless steel active area 21 x 7 mm Power 4x AA R150 Cells Alkaline NICAD or NiMH may be used Auto power off after 5 minutes Page 11 www diverse technologies net Units Symbol cgs Sl Magnetic Flux phi Maxwell Weber Flux Density B Gauss Tesla Magnetising force H Oersted A T m Permeability mu 1 4 pi E 7 of free space A T m is Ampere Turns m Conversion Factors Multiply by To Obtain Gauss 1E 4 Tesla Oersted 79 577 A T m In a vacuum or air then B H then mu0 1 so Flux density B in Gauss Magnetising Field H in Oersteds Flux density B in Tesla 4 1E 7 x Hin A T m Page 12 www diverse technologies net Low battery If the MF300B displays the legend Low battery the batteries are low charge If you have purchased the rechargeable unit then connect the charger and wait at least 30 minutes before using Wait 8 hours for full recharge If you have the dry cell unit replace with 4xAA alkaline cells Never use the battery charger with conventional dry cell batteries Page 13 www diverse technologies net Liability Diverse Technologies accepts no responsibility for the consequential losses arising from the ability or inabilit
4. e prompted for the destination directory and then asked for the password which is diverse magmeter mf300 Your Magmeter is now ready to measure follow the operation instructions to make a measurements Page 6 www diverse technologies net Operation The Magmeter has 4 keys power v tick a up down Step 1 Plug in the Flux Probe Step 2 Power On Off Switch the unit on by pressing the power key Hold the probe away from any magnetic surface and switch the unit on by pressing the power key Step 3 Preparation Hold the probe away from any magnetic surfaces and press the v tick key The instrument will display zeroing Once this is complete the instrument will display ready Step 4 Take Measurement DC field Press the w tick Measure DC will be displayed on the top line and a progress bar will be displayed Move the probe until it is in good contact with the surface where a measurement is required The measurement surface of the probe should lie on the surface and the long dimension of the probe should point in the direction where the measurement is required See picture on page 4 Once the display stops flashing it will indicate the peak value of flux density measured by the probe and the integrated value of flux density Note that the value displayed on the second line Page 7 www diverse technologies net Operation will rise as the probe is taken to the measurement surface but
5. splay options by pressing the tick key for less than two seconds or the space bar on the PC Page 9 www diverse technologies net Operation Software Software The serial version of the MF300B is supplied with software to run on a windows 7 Vista XP 2000 PC see First Time for information about installation The first time you use it you should identify the communications port you wish to use the program provides you with a list of possible ports The chosen port is stored in the configuration file and will be automatically selected next time it s run Connect the MF300B to the computer serial port or USB ports If using USB port you will need the USB to serial adapter cable supplied Ensure the MF300B is switched on With the software select start this will open the communications port and get the MF300B to identify itself on the listbox on screen Pressing a computer key except special keys see below or the up key on the MF300B will cause the current reading to be transmitted to the PC and it will be displayed l Gives the instrument type V Software version B Battery voltage Use file save to save the results to a CSV file which can be directly imported into Excel or Open Office Page 10 www diverse technologies net MF300B Specification Accuracy 5 of full scale in the range 0 3 to 1 3 Tesla when used on mild steel Operating Temperature OC to 40C Units mT T G
6. ty within steel components The meter can be used to measure static DC magnetic flux or varying AC magnetic flux in any direction along the surface of the component The measured values are displayed in either mT milliTesla T Tesla or G Gauss The MF300B is supplied with a probe which is able to measure tluxmeter F the magnetic flux density MF2008 Fh within steels When the Cambridge YK nologies net www diverse probe is placed on the surface of a steel component the magnetic flux within the component is sampled to provide the measurement see picture The orientation of the probe on the surface indicates the direction at which the flux density was measured The probe can be used on flat surfaces or curved surfaces with a minimum radius of curvature of 50 mm A serial output for connection of the Magmeter to a computer either through RS232 or USB is available as an option PC Software is included with this option which enables the magnetic field measurements to be recorded and input to a spreadsheet The instrument is supplied in a carrying case together with its dedicated probe Page 4 www diverse technologies net It is important to measure the magnetic flux density within steel components prior to carrying out Magnetic Particle Inspection MPI Procedures and standards such as BS6072 written to perform this type of non destructive test often state that a particular flux density such as 0
7. will drop back if the probe is removed before the progress bar has completed A new reading can be made by repeating steps 3 and 4 Step 5 Take Measurement AC field After following step 3 press the w tick for 2 seconds AC excitation will be displayed on the top line and a progress bar will be displayed Move the probe until it is in good contact with the surface where a measurement is required The measurement surface of the probe should lie on the surface and the long dimension of the probe should point in the direction where the measurement is required Once the display stops flashing it will indicate the peak value of ac flux density measured by the probe and the integrated value of flux density Note that the value displayed on the second line will vary as the ac field varies NB If the DC mode is used to measure a time varying flux or if the AC mode is used to measure a Static flux then the reported values will be in error Step 6 Changing units Press a up to change the measurement units mT milliTesla Tesla T and Gauss G can be selected Page 8 www diverse technologies net Step 7 Switch off Press and hold the power key to switch the unit off when no further measurements are required Step 8 Serial Output Readings from the MF300B can be output to a computer via the serial link Plug in the MagMeter using the cable provided either RS232 or USB Values can be output from any of the di
8. www diverse technologies net DIVERSE MAGMETER MF300B MAGNETIC FLUX METER USER MANUAL Version 2 0 03 14 DIVERSE CAMBRIDGE ENGLAND CB22 5EW www diverse technologies net Page 1 www diverse technologies net Contents PREFACE INTRODUCTION FIRST TIME OPERATION SOFTWARE SPECIFICATION UNITS LOW BATTERY Page 2 www diverse technologies net Preface Thank you for purchasing MF300B flux meter Before using the instrument please read these instructions carefully If you are uncertain about any aspect of its operation please contact Diverse by email for clarification at sales diverse technologies net The serial interface version of this product is provided with software to run on a PC The MF300B is the version of our popular MF series which uniquely offers the ability to evaluate the flux inside magnetic materials With a selection of magnetic units and a robust stainless steel probe that can be used with confidence in industrial environments In the same series is the magnetic field meter the MF300H which is the tool of choice for measuring magnetic fields from steel pipes and welding preparations With its robust stainless steel probe It is able to capture average or peak fields with confidence in situations where conventional delicate probes cannot be used Page 3 www diverse technologies net Introduction The MF300B Magnetic Flux Meter is used to measure the magnetic flux densi
9. y to use the equipment supplied The limit of warranty is the repair or replacement of any faulty components directly attributable to manufacturing defects arising during the period of 12 months following purchase This does not include damage resulting from incorrect operation of the instrument Designed and manufactured by Diverse Technologies amp Systems Ltd Zeromag House 46 48 Whittlesford Road Shelford Cambridge CB22 5EW UK Tel 44 0 1223 84 44 44 Email sales diverse technologies net http www diverse technologies net Page 14 www diverse technologies net Calibration and repair The MF300B and probe is supplied with a calibration certificate It is recommend that the unit is returned to Diverse annually for recalibration IMPORTANT Although the calibration can be checked by any competent institution the specialised calibrated torus and complex computer arrangements required to change or correct the calibration can only be undertaken at Diverse Technologies The cost for this is the same or less than that charged by institutions such as BSI or NPL If the MF300B requires repair the unit should be returned to Diverse there are no user serviceable parts Page 15 www diverse technologies net Disposal and Recycling This instrument should be deposed of in a responsible manner to allow the components within it to be recycled The wheelie bin symbol shown here and on the product means that the
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