MF300H+ manual - Diverse Technologies
Contents
1. files to the directory in which you want to work there is no separate installation file Generate an icon for the program on your desktop by right clicking the desktop then select New Shortcut and navigate to where your placed the exe file Run the program by either clicking it on the desktop icon or selecting it in file manager 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 its run Connect the MF300H to the computer serial port If your computer only has USB ports you will need the USB to serial adapter cable supplied Ensure the MF300H is switched on On the MF300H select start this will open the communications port and get the MF300H to identify itself on the listbox on screen Pressing the Enter key or the up key on the MF300H will cause the current reading to be transmitted to the PC and it will be displayed Use file save to save the results to a CSV file which can be directly imported into Excel or Open Office Page 15 www diverse technologies net Operation MPI Once you have completed the data collection select Stop and the system will inform you that the communication port is closed If you do not want to use the logging software provided then you can use any serial terminal software such as Hyperterminal supplied f2. show the actual value of the intensity of the magnetic field as an average peak or RMS value The measured values can be presented in a range of units and the chosen options can be selected from a menu displayed on the meter The MF300H is supplied with a Hall probe which is sensitive to magnetic fields Flat a R A robe tangential probes measure the field through 8 NI the flat surface On special order we can supply round axial probes to measure the R ee field along the axis of the probe see Fig 1 m l Direction of Magnetic fields can be measured in a range Field Measurement Fig 1 MF300H prob of units The preferred unit can be selected from the menu displayed on the meter A serial output for connection of the Magmeter to a computer either through RS232 or USB is available as an option Software is included with this option which enables the magnetic field measurements to be recorded and input to a spreadsheets The MF300H Magnetic Field Meter is supplied in a carrying case together with a Hall probe Versions which use the serial output are supplied with a lead for connection to a computer Page 4 www diverse technologies net First time The MF300H Magnetic Field Strength Meter is shown in Figure 2 The Meter is calibrated within a few weeks of despatch and a calibration certificate will supplied will be valid for 12 months from the date of purchase The unit requires 4 A
3. summed Finally they are averaged and square rooted The normal setting is 64 but options are 4 16 64 and 256 available The number of samples controls time response of the instrument in RMS mode A small number will result in a fast response but with greater reading uncertainty A large number will make the display update sluggish but will improve display resolution 5 4 Logger The logger feature allows you to sample the field over an extended time period See step 7 5 5 Serial This switches on and off the serial access facility With this mode on data can be requested from the instrument via the serial interface 5 6 Bar At the bottom of the main display is a bar graph This is built from small horizontal bars that are stacked vertically and fill as the reading increases The bar has two modes firstly it can be an indicator of the absolute reading working from the far left to the far right providing a resolution of 1 128 Alternatively the bar can be run from the centre of the bottom line of the display moving to the right to indicate positive sign and to the left to indicate negative This option switches between the two modes Page 10 www diverse technologies net Operation Autorange Step 6 Autoranging The letters in the top left hand corner of the display indicate if the instrument is set to autoranging or manual range selection The possible letters and their meanings are as follows AL Autoran
4. the v tick key to see the Set up 5 1 Select units eer TEE LE To Select the Units of PUREE FAT measurement press the v tick eee PTEE key to get to the setup menu SRE AMET TY then press the v tick key again menu This has 6 options and the units menu will be displayed The units available are mT millifesla T Tesla G Gauss kA m kiloamps metre Oe Oersteds and kA kiloamps at distance To select a new system of units press the up or v down keys until the required units are indicated Then press v tick to confirm the units and display the value of the magnetic field in the selected units In selecting kA kiloamps at distance you will be prompted to enter the distance from the conductor at which the measurement will be made ereire I ITT 5 2 Average Resse CTT This allows the number of PPE Eile samples to be selected for 1 H LEY E feet averaging This is normally set to 64 but any number in powers of 2 can be used between 2 and 128 The choice of this value controls the time response of the instrument in average mode A small number will result in a fast response but with greater reading uncertainty A large number will make the display update sluggish but will improve display resolution Page 9 www diverse technologies net Operation Logger 5 3 Samples This allows the number of samples to be selected for RMS mode In this mode samples are taken squared and
5. A cells which should be installed in the battery compartment on the rear of the housing DWERSE Haglieter 2 32 ml The Hall probe supplied with the meter is of a robust design suitable for the measurement of magnetic fields in workshops and laboratories Function ER oe tes Hall Probe Buftcwis The probe will however be damaged if it is subject to mechanical stresses kadad socket or forces The sensitive region of the Ty ne Serial Humber Hall probe is in the centre two Fig 2 MF300H MagMeter millimetres from the tip Fig 1 shows the location of the sensitive region and the direction in which the magnetic field is measured lf you have chosen the serial interface version you should install the software on your PC To do this place the CD in your drive To install on Windows Use Program Manager run file Select drive A Double click on INSTALL BAT The software will be copied to your hard disc C diverse Page 5 www diverse technologies net Quick start 1 Plug in the field probe 2 Load the AA batteries in to the battery compartment ensuring that the polarity is correct 3 Press the power button the unit will switch on 4 Press the v down button and select the mode displayed at the top right hand side of the display 5 Press the up button till auto mode is selected this is shown by the A symbol in the top left hand corner of the display 6 Press tic
6. aking readings Hold the probe away from magnetic fields The display should show 0 0 Gauss within 0 5 Gauss If not press v tick key for 2 seconds The display will indicate zeroing then change to read approximately zero The probe can now be used to take measurements The reading can be zeroed in this way at any time Page 7 www diverse technologies net Operation Options Step 4 Select Reading Options The MF300H can display the Average Peak or RMS value of the magnetic field To go from one to the another press the v down key each time The nature of the current display is shown on the top right hand corner of the screen The options are as follows Average AVG The unit averages 480 readings taken over a period of 300mSecs The display of the averaged value is updated every 0 33 seconds APk Absolute peak The maximum value of the magnetic field recorded since the meter was last zeroed without regard to the direction of the field Note that this is not the peak value of an alternating field it is the maximum value sensed for alternating static or combined magnetic fields Peak The maximum values of the magnetic field recorded since the meter was last zeroed Both directions of the field are displayed RMS The true Root Mean Square value of a varying magnetic field will be displayed Page 8 www diverse technologies net Operation Sep up Step 5 Set up Menu At the main display press
7. ging with range on the lowest most sensitive setting AM Autoranging with the display on the mid range AH Autoranging with the display on the high range ML Manually set to the low range MM Manually set to the mid range MH Manually set to the high range In the peak and autoranging modes of operation the unit will reset the peak if the range is changed The autoranging mode can be switched on and off using the up key If Manual ranging is selected in this way then the Low Medium or High ranges can be selected by pressing the power key briefly Auto Power off The instrument will automatically power off after 3 minutes of no key presses This is feature is overridden in the logging mode or characters coming in from the serial port Step 7 Serial Output Readings from the instrument can be output to a computer via a serial link This can be RS232 or USB Connect the instrument to the PC using the cable provided Values can be output from any of the display options by pressing the v tick key for less than two seconds Page 11 www diverse technologies net Operation Logging Step 8 Logging mode From the set up menu select Logger 8 1 Review This presents the logged data in groups of 4 to the extent of the logger database You can scroll through the data with the up down keys Any other key exits 8 2 Clear This zeros the complete logging database 8 3 Serial This outputs the complete databa
8. ion 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 MF300H requires repair the unit should be returned to Diverse there are no user serviceable parts Page 21 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 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 22
9. k key once to select the step up menu use v down button or up button to choose the units required then press tick key to select Your Magmeter is now ready to measure Move the probe to the magnetic field and its value will be displayed Zeroing The MF300H has 2 zeroing modes 1 Press and hold the v tick key to instigate a simple offset zero for the current range This would be used in operation to null small ambient field offsets 2 Press and hold the v down key to instigate a full hardware zero for all ranges This happens automatically at switch on During the process which takes about 3 seconds the calibration due date is displayed Page 6 www diverse technologies net Operation The Magmeter has 4 keys power v tick a Up v down The power and tick keys second meanings if held down for more than 2 seconds The step by step instructions that follow provide all the key information about operation of the instrument Note that unless otherwise specified any readings referred to are in Gauss Step 1 Plug in the Field Probe Step 2 Power On Off Switch the unit on by pressing the power key The display shows zeroing and calibration due date for a few seconds and then the value of the magnetic field This will be based on the last used settings of mode and units To switch the unit off press and hold the power key for 2 seconds Step 3 Zero The zero reading of the meter should be adjusted before t
10. ree with Windows Free updates to the logging software are placed on our web site http www diverse technologies net Page 16 www diverse technologies net MF300H Specification Accuracy Transverse probe 1 of full scale Axial Probe 2 of full scale Operating Temperature OC to 40C The instrument has temperature compensation for the Hall probe Units mT T G kA m Oe kA at distance Range 0 1 99T autoranging Manual ranging is also available in three decade switches Resolution 10uT 100uT 1mT Zero The instrument can be zeroed in any field up to 50G Modes Average Normal reading over 10ms Peak Peak value 10ms samples RMS of the signal taken as averaged samples computed in real time Probe Stainless steel active area 0 2x0 2mm Power 4x AA R150 Cells Alkaline NICAD or NiMH may be used Auto power off after 3 minutes user override Page 17 www diverse technologies net Units Symbol cgs SI 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 19 577 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 H in A T m Page 18 www diverse technologies net Low battery If the MF300H displa
11. se to the serial interface 8 4 Period The time period between samples is set here between 1 and 120 seconds The adjustment is done using the up and down keys Note pressing and holding these keys advances in increments of 10 8 5 Start This starts logging with auto power down disabled during logging During logging the normal display screen is presented showing the sample number on the left hand side and the time period at the top of the display Logging can be stopped by a double click of the v tick key A single press of the v tick key advances the sample number When logging is complete the unit returns to normal operation 8 6 About Please contact us for support calibration updates and repair Page 12 www diverse technologies net Operation MPI Magnetic Particle Inspection A wide range of magnetising systems are used for Magnetic Particle Inspection The value of the magnetic flux density required is specified in BS4069 as 0 72 Tesla This is produced when the magnetising coils generate a magnetic field of 2 4kA m which is applied to a component made from material with a relative permeability of 240 The MF300H has a facility to provide simple pass fail test for the status of the applied field To put the unit in this mode press tick to get to the menu select MTB Magnetic Test Bench you will then be prompted to switch test bench on or off If you select on then press tick and you will be presented wi
12. th the value of the required threshold field nominally 2400 A m Pressing the up arrow advances the threshold by 10A m press and hold the up arrow for 2 seconds and the threshold will advance by 100 A m Use up down arrow to set the value you require then press tick to accept You will then be taken to the normal screen which will identify the field size in RMS mode and an indicator to say whether the field level is below the threshold Lo or above Ok To check the magnetising system switched it on and in the absence of the component to be measured the field should be measured If the value is greater than 2 4kA m then the magnet meets BS4069 When the magnet is used to magnetise a steel component it will have a flux density of over 0 72Tesla Page 13 www diverse technologies net Lang Up Long power gt a Auto manual Tare Manual H M L down Mode Average APeak Peak RMS General usage Navigate using up down arrow to choose tick to accept power to escape MF300H USER Ext at end or INTERFACE abort with tick Page 14 www diverse technologies net Operation Software Software The serial version of the MF300H is supplied with software to run on a windows 7 Vista XP 2000 PC see First Time for information about installation The program name is MAGW EXE Its operation is as follows Download the files from our website Copy all the
13. www diverse technologies net DIVERSE MAGMETER MF300H MAGNETIC FIELD STRENGTH METER USER MANUAL Version 1 2 11 14 DIVERSE CAMBRIDGE ENGLAND CB22 5EW www diverse technologies net Page 1 www diverse technologies net Contents PREFACE INTRODUCTION FIRST TIME QUICK START OPERATION MAGNETIC PARTICLE INSPECTION SOFTWARE SPECIFICATION UNITS LOW BATTERY Page 2 www diverse technologies net Preface Thank you for purchasing MagMeter Before using the unit please read these instructions carefully If you are uncertain about any aspect of its operation please contact Diverse our contact details are at the end of this manual The serial interface version of this product is provided with software to run on a PC The MF300H is our latest version of our popular MF series offering wide dynamic range excellent autoranging a wide selection of magnetic units and a robust stainless steel probe that can be used with confidence in industrial environments The MF300H is the tool of choice for measuring magnetic fields 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 MF300H Magnetic Field Meter is used to measure the intensity and the direction of magnetic fields The meter can be used to
14. ys the legend Low Battery on the bottom row of the display when the batteries are low When the batteries are low the bar graph facility is not available lf you are using rechargable cells then recharge them using a suitable charger If you are using dry cells replace with 4xAA alkaline cells Never use a battery charger with conventional dry cell batteries Page 19 www diverse technologies net Liability Diverse Technologies accepts no responsibility for the consequential losses arising from the ability or inability 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 20 www diverse technologies net Calibration and repair The MF300H 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 complex computer arrangements required to change or correct the calibrat
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