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Summary of Contents for Diverse MF500M+
- Page 1 DIVERSE MAGMETER MF500M+ MAGNETITE METER USER MANUAL Issue 230309 DIVERSE CAMBRIDGE ENGLAND CB22 5EW www.diverse-technologies.net Page 1...
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Page 2: Table Of Contents
Contents INTRODUCTION FIRST TIME - QUICK START OPERATION OPERATION - OPTIONS CALIBRATION AND PIPE OCCLUSION MEASUREMENT TECHNIQUE SPECIFICATION LIABILITY CALIBRATION AND REPAIR DISPOSAL AND RECYCLING Page 2... -
Page 3: Introduction
Thank you for purchasing MF500M+. 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 MF500M+ is designed to measure magnetite in non- magnetic stainless steel pipes, particularly cooling pipes in power stations. -
Page 4: First Time, Quick Start
First time, quick start The unit requires 4 AA cells which should be installed in the battery compartment on the rear of the housing. Measurements are made by bringing the flat area at the front side of the probe into contact with the outside of the pipe. The probe measures force and has correction for gravitational force, but it is good practice to zero the probe in the same orientation as the measurement. -
Page 5: Operation
Operation There are 4 buttons on the meter and one on the probe with functions as given in table 1. Button presses are accompanied by audible confirmation as ℹ Power long press to turn unit off, short press to turn on �... -
Page 6: Operation - Options
Operation - Options This is the normal mode of operation. There are two display modes for this menu which can be toggled using a long press on the up � or down � keys. Data is updated approximately every second. The first mode displays the measured value, currently stored offset and signal (difference) on the bottom line. - Page 7 Operation - Options Press tick � to clear records and set next record pointer to start of memory. Reverts back to main screen. Press tick � to see software version. To leave press up � or down � keys. The instrument has two calibration factors used when estimating pipe occlusion, gain and packing factor.
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Page 8: Calibration And Pipe Occlusion
Calibration and pipe occlusion A magnetite sample was used for factory calibration, This is a cuvette 1cmx1cmx1.5cm packed with magnetite flakes. A force measurement is recorded with the centre of a long side of the cuvette 5mm from the centre of the probe measurement surface (to simulate a pipe wall thickness). -
Page 9: Measurement Technique
Measurement technique The meter provides a number that increases with the amount of magnetite present. The following aspects should be noted: 1. The meter is corrected for gravity but it is good practice to zero the meter, away from the pipe, in the same orientation as the measurement to follow. - Page 10 Measurement technique We recommend that a number of pipes are surveyed and the measurements correlated with magnet tests and x-ray data. From these results a measurement rational should be evident that allows pipes with a particular occlusion to be readily identified using the meter.
- Page 11 Calculation of Magnetite from MF500M readings The magnetite meter measures the force on a powerful rare earth magnet caused by the ferritic component of the magnetite. It is a prerequisite of this technique that the containing pipe is stainless steel which is not magnetic. In making the measurement the instrument has a sensor that has some compensation for the probe orientation in respect to gravitational forces.
- Page 12 Calculation of Magnetite from MF500M+ readings Placing the probe on any point on the surface of the pipe slowly move the probe around the surface of the pipe keeping the face of the probe at a tangent to the pipe surface. noting the points where the reading is the highest and lowest S and S Now you need to decide whether the magnetite is coating the...
- Page 13 Calculation of Magnetite from MF500M readings Defining the sector thickness t to be the thickest point of a sector bounded by the inside of the pipe and a straight line across the arc, and, R is the radius of the inside of the pipe. of sector thickness, t is: t = R * (1 - cos(θ)) Ratio of sector thickness to radius is:...
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Page 14: Specification
MF500M Specification Reading range 0 to 2047 force units Occlusion 0 to 100% Technique Uses net magnetic force to identify magnetite and magnetic material Accuracy Reading range: 0 - 2047 force units. These are arbitrary units, and each instrument needs to be calibrated to the specific pipe geometry and magnetite samples Zero... -
Page 15: Liability
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. - Page 16 Diverse Technologies. If the MF500M+ requires repair, the unit should be returned to Diverse, there are no user serviceable parts. This instrument should be deposed of in a responsible manner to allow the components within it to be recycled.
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