Bartington Mag613 User manual

www.bartington.com
INNOVATION IN MAGNETICS
Telephone: [phone] •Email: [email protected] •Website: www.bartington.com
Bartington Instruments Ltd
5, 8, 10, 11 & 12 Thorney Leys Business Park
Witney, Oxford, OX28 4GE. England
®The copyright of this document is the property of Bartington Instruments Ltd.
Bartington is a registered trademark of Bartington Instruments Limited in the following countries: Australia, Brazil, Canada, China, European Union, India,
Israel, Japan, Mexico, New Zealand, Norway, Russia, Singapore, South Korea, Switzerland, Turkey, United Kingdom, United States of America and Vietnam.
Operation Manual for
Mag613 Eight-Channel
Three-Axis
Magnetometer Array
OM2442/2

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Table of Contents
1. Legal Notices 4
1.3. Warranty and Terms & Conditions 4
2. How to Use this Manual 4
2.1. Symbols Glossary 4
3. Safe Use 5
4. Introduction to the Mag613 5
4.1. Vector Measurements and Conventions 5
5. Installing the Mag613 6
5.1. Siting the Magnetometer 6
5.2. Cable Recommendations 6
5.3. Pre-installation Tests 6
5.4. Mounting Recommendations 7
5.5. Post-installation Testing 7
6. Using the Mag613 8
6.1. Magnetic Hysteresis 8
6.2. Environmental Precautions 8
7. Troubleshooting 9
8. Care and Maintenance 10
8.1. Cleaning the Mag613 10
8.2. Calibration 10
8.3. Storage 10
8.4. Transport 10
9. End of Life Disposal 11
9.1. Waste Electrical and Electronic Equipment (WEEE) Regulations 11

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10. Contacts 11
Notes 12

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1. Legal Notices
1.3. Warranty and Terms & Conditions
This document should be read in conjunction with the Terms & Conditions for the Supply of
Goods and Services, which also describe the terms of warranty. They are available at www.
bartington.com.
Bartington Instruments reserves the right to change any part of the design of these products
without prior notice.
2. How to Use this Manual
This document describes the installation, function, testing, operation and maintenance of the
Mag613 eight channel three-axis magnetometer array.
This manual should be read in conjunction with brochure DS1854, available from the product
page on the Bartington Instruments website, which contains technical, mechanical, electrical,
environmental and performance specifications for the product. A sensor outline drawing and
electronics schematic are also available on this page.
Note that failure to follow the instructions in this manual may invalidate your product’s warranty.
If in doubt, do not hesitate to contact Bartington Instruments.
2.1. Symbols Glossary
The following symbols used within this manual call your attention to specific types of
information:
WARNING: Indicates a situation in which serious bodily injury or death could result if the
warning is ignored.
Caution: Indicates a situation in which bodily injury or damage to your instrument, or both,
could result if the caution is ignored.
Identifies items that must be disposed of safely to prevent unnecessary damage to the
environment.
Note: Provides useful supporting information on how to make better use of your purchase.

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3. Safe Use
WARNING: These products are not qualified for use in explosive atmospheres or life
support systems. Consult Bartington Instruments for advice.
4. Introduction to the Mag613
The Mag613 three-axis, eight-head fluxgate is designed to be particularly flexible in use. The
main interface cable to the electronics module will not have been fitted with a connector. This
allows the user to fit their preferred type, perhaps after the cable has been fitted through a
bulkhead or other restricted space.
4.1. Vector Measurements and Conventions
Each of the eight magnetometer heads measures in three axes marked x, y and z. The z axis is in
line with the connecting cable. Each axis produces a single, analogue output voltage in response
to the magnitude of a magnetic field.
The cables connecting the sensor heads to the electronics module can be mounted in almost any
configuration, giving maximum flexibility to the user.

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5. Installing the Mag613
5.1. Siting the Magnetometer
Note: In whatever situation the Mag613 is to be installed, it is important to avoid or
compensate for local magnetic effects. In general:
• The magnetometer should be sited several metres from any magnetic base rock to
avoid compromising measurements.
• Site the magnetometer several tens of metres from very large ferromagnetic objects
that could become magnetised and create fields that exceed the measuring range of
the sensor.
• Avoid siting the sensor near any ferromagnetic objects that may be subjected to the
effects of magnetic hysteresis, which would affect the sensor in an unpredictable
manner.
Note: For these reasons, a magnetic evaluation of any proposed installation site should be
conducted to establish that it is free from magnetic contaminants. It is recommended that
such an evaluation be carried out using total field or resonance magnetometers.
5.2. Cable Recommendations
To connect your Mag613 to a data acquisition unit, a mating connector will usually be required.
Refer to brochure DS1854 and the product label for wiring details.
Note: Cables are particularly prone to wear and damage if twisted, flexed beyond their
design limits, or subjected to excessive or repeated movement. It is recommended that all
cables are mounted securely in place. For further details refer to Section 5.4: Mounting
Recommendations.
5.3. Pre-installation Tests
Prior to the installation of the system, the magnetometer, the cable and your power supply must
be fully tested to ensure correct function as follows:
1. Check the interface cable for short circuits between the wires.
Note: The two ground wires (analogue and digital) are connected internally. Continuity
between these pins is normal and does not indicate a fault.
2. Check your power supply output voltage using a voltmeter. Refer to brochure DS1854 for the
expected values.

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3. Ensure correct connection of the interface cable to your power supply. Refer to brochure
DS1854 for details.
4. Switch on the power supply.
5. For the output:
a. Connect a voltmeter to the Mag613 output, i.e. across the analogue output signal
and analogue ground.
b. Select sensor head and channel by setting the digital address lines correctly (refer
to brochure DS1854 for address tables).
c. Whilst monitoring the voltmeter readings, align the magnetometer with the
terrestrial field.
d. Confirm the measured readings approach the local geomagnetic field value.
e. Address each monitor line (1 to 8) and verify the output is correct (refer to brochure
DS1854 for values).
Note: Geomagnetic field values can be provided by your local magnetic observatory. A
margin of error due to local disturbance should be taken into account.
5.4. Mounting Recommendations
Each electronics module has a set of mounting holes to allow attachment to a stable base of
fixture. Refer to sensor outline drawing DR2512 on the product page for further information.
Note: Ensure the main cable is routed through any restricted spaces before connecting to
the power supply/data acquisition module.
5.5. Post-installation Testing
1. Confirm no magnetic objects are moving in the vicinity.
2. Monitor the sensor output.
3. Confirm that the sum of the measured magnetic field vector is similar to the expected local
earth field.
Note: The outputs from the sensor should remain stable to within the quoted noise limits.
Refer to brochure DS1854 for the expected values.

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6. Using the Mag613
6.1. Magnetic Hysteresis
Note: Do not subject your magnetometer to magnetic fields greater than their stated
measuring range for extended periods as this could alter the DC offset. If this occurs, the
offset will exhibit drift as it returns to its original offset specification.
Caution: Subjecting the magnetometer to fields in excess of 2 x the nominal range may
cause inaccuracy in future measurements.
6.2. Environmental Precautions
Refer to brochure DS1854 for maximum environmental electrical and mechanical ratings.
Caution: Exceeding the maximum environmental ratings may cause irreparable damage to
your sensor.

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7. Troubleshooting
Your Mag613 is unlikely to suffer any defects in normal use and it is not user serviceable.
Note: Attempting to open any part of the instrument, for any reason, will invalidate your
warranty. If you are experiencing problems with your Mag613, which cannot be corrected
by following the instructions in the table below, contact the Bartington Instruments
Helpdesk.
The most likely causes of failure, and their solutions, are detailed in the following table:
Cause Solution
Power supply Check the power supply, as detailed in Section 5.3: Pre-
installation Tests.
Cables Check the power supply/data acquisition cable, as detailed
in Section 5.3: Pre-installation Tests.
Power voltage drop If no fault can be found in the power supply or cables,
ensure the cable length is not too long, causing excessive
voltage drop between the power supply and magnetometer.
Refer to the specifications defined in brochure DS1854.
Damaged sensor If any physical damage is apparent to the module and /
or the casing then the sensor may need to be repaired or
replaced. Return the unit to Bartington Instruments for
repair and / or calibration. For information about disposal of
a damaged unit, refer to Section 9: End of Life Disposal.
Inaccurate measurements
after being subjected to
high magnetic fields
Degauss the magnetometer to reverse the effect. Contact
Bartington Instruments for advice if needed.
Damaged or malfunctioning
sensor head
Sensor heads are independent. Failure of one will not
affect the correct operation of the other sensor heads.
However, if sensor head repair is required then return the
whole instrument to Bartington Instruments for repair or
replacement.

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8. Care and Maintenance
No user repair or servicing is possible beyond the steps listed below and in Section 7:
Troubleshooting.
Note: The Mag613 contains no user serviceable parts. Attempts to dismantle, modify or
repair the magnetometer will invalidate the Warranty.
8.1. Cleaning the Mag613
Caution: Avoid using chemicals, such as solvents, when cleaning the Mag613. Use a cloth
wetted with soap and water to remove grime from enclosures.
8.2. Calibration
Periodic calibration of the Mag613 is not required. If a fault is suspected, the sensor should be
returned to Bartington Instruments for inspection and repair or replacement.
8.3. Storage
Caution: Do not store the Mag613 in temperatures outside the range specified in brochure
DS1854.
Caution: Avoid storing the Mag613 in areas with magnetic fields above the range of the
magnetometer (refer to brochure DS1854).
Caution: Avoid storing the Mag613 with abrasives, corrosive chemicals or solvents.
8.4. Transport
The Mag613 system is a precision electronic instrument and should be treated as such.
Note: Bartington Instruments supplies its products in appropriate packaging for
transporting. This packaging should be used for any future transport.
Note: Avoid bending cables through angles greater than the minimum bend radius as
specified in brochure DS1854.
Note: Avoid excessive exposure to high temperatures, vibration or shocks.

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9. End of Life Disposal
This product should not be disposed of in domestic or municipal waste. For information about
disposing of this product safely, check local regulations for disposal of electrical / electronic
products.
9.1. Waste Electrical and Electronic Equipment (WEEE) Regulations
This product complies fully with Restriction of the Use of Certain Hazardous Substances in
Electrical and Electronic Equipment (RoHS) and WEEE Regulations current at the time of
printing.
10. Contacts
Details of how to contact Bartington Instruments Ltd. for aftersales support, technical queries,
etc. can be found on the Bartington Instruments website at www.bartington.com.

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Notes

www.bartington.com
INNOVATION IN MAGNETICS
Telephone: [phone] •Email: [email protected] •Website: www.bartington.com
Bartington Instruments Ltd
5, 8, 10, 11 & 12 Thorney Leys Business Park
Witney, Oxford, OX28 4GE. England
®The copyright of this document is the property of Bartington Instruments Ltd.
Bartington is a registered trademark of Bartington Instruments Limited in the following countries: Australia, Brazil, Canada, China, European Union, India,
Israel, Japan, Mexico, New Zealand, Norway, Russia, Singapore, South Korea, Switzerland, Turkey, United Kingdom, United States of America and Vietnam.