Diverse MF300Fe+ Manuale utente
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Page 103/2018
MF300Fe+
FERRITE METER
USER MANUAL
DIVERSE
CAMBRIDGE
ENGLAND
CB22 5EW
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DIVERSE
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PREFACE
INTRODUCTION
FIRST TIME
QUICK START
OPERATION
FERRITE PERCENTAGE
SOFTWARE
SPECIFICATION
LOW BATTERY
LIABILITY
CALIBRATION & REPAIR
DISPOSAL & RECYCLING
Contents
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Thank you for purchasing the Ferrite Meter. 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 MF300Fe+ is the latest version of the Diverse Ferrite Meter. It
has a large number of features including:
●Robust slimline probe
●Five individual transfer calibration standards
●Peak measurement mode
●User calibration
●1000 records including user specified IDs
Options include:
1. Standard 10 mm diameter probe (P10), air-cooled probe for
hot samples (P10ac) or small 4 mm x 6 mm probe (P46)
2. Serial software for download to PC (RS232/USB)
3. Charger (for rechargeable cells - not supplied)
Preface
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Industrial processing and chemical plants work at high
temperatures and pressures, with often aggressive media and
stainless steel is often the material of choice for these applications.
If the ferrite content of the steel steel is too low, then welding of
stainless material may crack at elevated temperature or with high
stress or vibration. Alternatively, if the ferrite content is too high, the
weld may be weaker and corrode.
To address the need to measure the amount of ferrite in a sample
the Welding Research Council introduced the Ferrite Number (FN)
as standardised value which related to the ferrite content of an
equivalently magnetic weld metal.
The volume percentage of ferrite can be estimated as about 70% of
the FN but the relationship depends upon the type and origin of the
stainless steel used and the measurement technique (see section
on Ferrite %)
The Diverse Ferrite meter MF300Fe+
measures the Ferrite number (FN) of
austenitic and duplex stainless steel weld
material. It has a choice of probes: e.g. see
image for P10 probe that is sensitive to ferrite content in a 10 mm
area to a depth of approximately 1 mm. The instrument is
calibrated using the secondary ferrite number standards prepared
by the National Institute of Standards and Technologies (NIST) in
USA. Sixteen standards are used ranging from 0.5 to 111.9 FN
giving an instrument with a measurement range from 0 to 115 FN.
Transfer standards are supplied with the instrument allowing
performance to be verified at any time.
Introduction
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The MF300Fe+ Ferrite Meter is supplied in a red carry case with 5
transfer calibration standards. The Meter is calibrated within a few
weeks of despatch and
supplied with a calibration
certificate. The veracity of the
instrument can be checked at
any time using the transfer
standards. The unit requires 4
AA cells which should be
installed in the battery
compartment on the rear of the housing.
The sensitive region of the probe is the flat silver area at the probe
end.
If you have chosen the serial RS232/USB interface version, you
should:
●Load the USB driver onto your computer using the CD
supplied
●Download the serial software from:
http://www.diverse-
technologies.net/software/magmeterserial.zip
●Unpack the files into a directory. To run the software click on
MagmeterSerial.exe (for convenience we recommend you
make a shortcut on your desktop)
First time
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1. Plug in the ferrite probe.
2. Load four AA batteries in to the battery compartment ensuring
that the polarity is correct.
3. If you have the gas cooled option and are using hot samples
connect a gas/air-line, regulated to 2 bar, to the probe using
the fitting provided.
4. Press the power key i, the unit will switch on.
5. Hold the probe away from magnetic material and press the tick
key a. This will zero the probe. The P46 probe is very
sensitive and will detect the earth’s field so zero the probe in
the same orientation as the measurement.
6. Move the probe to sample to be measured, the FN is
displayed.
7. Press and hold the up key 5 to toggle between FN and ferrite
percentage. Note that the ferrite percentage displayed is
calculated using a conversion graph (see section on ‘Ferrite
Percentage’).
8. Pressing the tick key a to access the menu (including user
calibration, transfer standard mode and logging, see later for
details).
9. Press the power key i to store the current measurement (see
section on ‘Recording a new record into the database’ for
details)
10. Press and hold the power key i to switch the instrument off.
If the instrument is not used for a period of about 5 minutes it
will automatically switch off to preserve battery life.
Quick start
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The Ferrite meter has 4 keys:
i power atick 5up 6down
The i power, atick, 5up and 6down keys have a 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.
Step 1 Plug in the Ferrite Probe
Step 2 Power On/Off
Switch the unit on by pressing the i power key. The display
shows a splash screen followed by ‘zeroing..’ for a second
and then then the value of FN. This should be 0.0 FN. To
switch the unit off press and hold i power key for 2 seconds.
The screen will show ‘Power off’ before going blank
Step 3 Zero
The zero reading of the meter should be adjusted before
taking readings. Hold the probe away from magnetic material.
The display should show 0.0 FN. If not, pressatick. The
display will indicate ‘zeroing..’ then the display should show
0.0 FN. The probe can now be used to take measurements.
The reading can be zeroed in this way at any time. For the
P46 probe ensure the probe is zeroed in the same orientation
as will be used for the measurment.
Operation
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Step 4 Display Options
4.1 Top line
4.1.1 Record number
On the top line the
number of the next
available record in
the database is
displayed on the left.
There are 1000 available records (0-999) and the current
measurement value can be saved by pressing the i power
key.
4.1.2 Mode
On the top line, at the right, the mode is displayed. There are
three options, AVG, PEAK and TRAN. In AVG the value of
FN (or F%) will continuously be updated. In PEAK mode the
largest measured value will be displayed, press atick to start
afresh. Press the 6down key to toggle between the AVG
and PEAK modes. For TRAN see section 4.3
4.1.3 Calibration
If the user calibration is being used then a ‘U’ will be
displayed on the top line to the right of the record number.
When the ‘U’ is not displayed the factory calibration is being
used. For details on user calibration see section 5.2
4.2 Second line
On the second line the current measured value is displayed.
Operation - Display Options
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This value will be
displayed as FN or F%, to
toggle between these
units press and hold the
5up key. Note that the
instrument is calibrated
using FN standards and
that the reported F% is
calculated using a conversion graph (see section on Ferrite
percentage)
4.3 Third line
The third line will show the ID for the next record in the
database unless the transfer calibration mode has been
selected (See section 5.3).
In this mode the value (FN)
will be displayed on the
second line (as usual) but
the expected value for one
of the transfer standards
will be shown on the third
line. To cycle through the transfer standards use the 6down
key. This mode facilitates checking the veracity of the
instrument.
4.4 Bottom line
The bottom line has a bar graph which shows the current
value graphically where a full bar corresponds to full scale
(115 FN).
Operation - Display Options continued
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Step 5. Menu
To access the menu press and hold the atick key. Use the 5up
or 6down keys to move between the options and atick key to
access a particular option.
5.1 Select factory/user calibration (Cal F/U)
The instrument can be operated with the factory calibration or a
user calibration. Press the atick key to select between these two
options. Press the 5up or 6down keys to toggle between the two
options, atick selects and i power to abandon
5.2 New user calibration (New cal)
This option allows a user calibration to be performed. A user may
opt for this if the transfer calibration standards are not measuring
accurately. If the transfer standards do not read accurately after a
user calibration then the instrument should be returned to Diverse
for factory calibration. Press atick key to select user calibration.
The screen will show ‘zeroing..’ and then request user to place
probe onto the centre of T0 sample and press tick. The instrument
will display the factor used for user calibration (a factor of 1.0
indicates no change from factory calibration).
5.3 Transfer calibration mode (Trans)
This allows selection of the transfer calibration mode (for
description see 4.3 Third line).
Operation - Menu
Indice
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