Metrol THM1176 Manuel utilisateur

Magnetic precision has a name

Three-axis Magnetometers

THM1176 and TFM1186

User's Manual

Version 2.0

(Revision 1.0)

February 2020

www.metrolab.com

REVISION HISTORY

v. 1.0 r. 1.0

May 2008

First release

v. 1.0 r. 1.1

May 2008

Various fixes

v. 1.1 r. 1.0

July 2008

Various fixes

v. 1.2 r. 1.0

December 2009

Updates for version 3.x of software

Updates for version 2.x of firmware

Updates for THM1176-LF

Various fixes

v. 1.2 r. 1.1

February 2010

Add notice concerning WEEE Directive

v. 1.2 r. 1.2

July 2010

Restore formatting of -HF dimensions

v. 1.3 r. 1.0

January 2012

Update for software release 4.0 and firmware

release 3.0

Update links for external documentation

Add documentation for THM1176-HFC

v. 1.3 r. 1.1

April 2012

Correct installation procedure

v. 1.3 r. 1.2

April 2014

Add documentation for THM1176-MF, TFM1186

Adapt documentation for SoMo™ 655

Remove references to electronic newsletter

Update links to USB documentation

Update for LabVIEW Mobile Module end-of-life

Miscellaneous clean-ups

v. 1.3 r. 1.3

November 2014

Update for different versions of THM1176-MF and

THM1176-HFC sensor

Correct section numbering in Chapter 5

v. 1.3 r. 1.4

October 2016

Update for different versions of THM1176-MF

sensor

Update links for USB references

v. 2.0 r. 1.0

February 2020

Rewrite Chapter 2, “Quick Start Guide”

Rewrite Chapter 3, “Overview”

Delete Chapter 4, “Software User Interface”

Rewrite Chapter 5, “Application Programming”

Update dimensions of THM1176-HFC

THM1176/TFM1186 User’s Manual v 2.0 r 1.0 –02/20 Copyright © 2020 Metrolab Technology SA 
 www.metrolab.com 
iii 
CONTENTS 
 
1- Introduction.......................................................................................................1 
2- Quick Start Guide..............................................................................................3 
2-1 Kit Contents ............................................................................................................................................ 3 
2-2 Windows Software Installation and Removal..........................................................................................3 
2-2-1 Software Installation.....................................................................................................................3 
2-2-2 Software Removal........................................................................................................................4 
2-3 Macintosh Software Installation and Removal.........................................................................................4 
2-3-1 Software Installation.....................................................................................................................4 
2-3-2 Software Removal........................................................................................................................4 
2-4 Starting to Measure.................................................................................................................................5 
2-5 Using the Handheld Kit ...........................................................................................................................5 
2-6 Precautions.............................................................................................................................................6 
2-7 Axis Orientations.....................................................................................................................................8 
3- Overview............................................................................................................9 
3-1 Hardware Block Diagram........................................................................................................................ 9 
3-2 Sensors...................................................................................................................................................9 
3-3 Measurement Process ..........................................................................................................................10 
3-4 Characteristics and Benefits ................................................................................................................. 11 
3-5 Probe Mechanical Design ..................................................................................................................... 13 
3-6 Host Computer Interface.......................................................................................................................14 
3-7 Host Computer and Software................................................................................................................15 
3-8 Calibration, Maintenance, Repair and Warrenty....................................................................................15 
4- Options for Computer Control.......................................................................17
4-1 EZMag3D Turn-key Software................................................................................................................17 
4-2 EZMag3D Plugins................................................................................................................................. 17 
4-3 THM1176 Instrument Control API......................................................................................................... 17 
4-4 THM1176 Instrument Manager ............................................................................................................. 18 
5- USB Interface ..................................................................................................19
5-1 General.................................................................................................................................................19 
5-2 SCPI Instrument Model.........................................................................................................................20 
5-3 IEEE 488.2 / SCPI status registers ....................................................................................................... 22 
5-4 USBTMC-USB488 Controls.................................................................................................................. 26 
5-5 IEEE 488.2 Common Commands.........................................................................................................27 
5-6 SCPI Commands ..................................................................................................................................27 
5-7 Programming Hints ...............................................................................................................................40 
6- Technical Specifications................................................................................43
6-1 Measurement........................................................................................................................................ 43 
6-2 Interface................................................................................................................................................44 
6-3 Operating conditions............................................................................................................................. 44 
6-4 Mechanical –THM1176-MF/HF............................................................................................................45 

THM1176/TFM1186 User’s Manual v 2.0 r 1.0 –02/20 Copyright © 2020 Metrolab Technology SA 
 www.metrolab.com 
iv 
6-5 Mechanical –THM1176-HFC................................................................................................................ 47 
6-6 Mechanical –THM1176-LF................................................................................................................... 48 
6-7 Mechanical –TFM1186......................................................................................................................... 48 
6-8 Software................................................................................................................................................49 
6-9 Warranty, Calibration, Certification and Maintenance........................................................................... 49 
7- THM1176-MF/HF/HFC Sensor Details............................................................50 
8- Error Codes.....................................................................................................52 
8-1 0: No Error ............................................................................................................................................52 
8-2 -100: Command Errors..........................................................................................................................52 
8-2-1 -102: Syntax error...................................................................................................................... 52 
8-2-2 -104: Data type error..................................................................................................................52 
8-2-3 -115: Unexpected number of parameters ..................................................................................52 
8-2-4 -123: Exponent too large............................................................................................................ 52 
8-2-5 -151: Invalid string data..............................................................................................................52 
8-2-6 -171: Invalid expression.............................................................................................................53 
8-3 -200: Execution Errors ..........................................................................................................................53 
8-3-1 -221: Settings conflict.................................................................................................................53 
8-3-2 -222: Data out of range..............................................................................................................53 
8-3-3 -225: Out of memory.................................................................................................................. 54 
8-4 -400: Query Errors ................................................................................................................................54 
8-4-1 -400: Query error .......................................................................................................................54 
8-4-2 -410: Query INTERRUPTED ..................................................................................................... 54 
8-4-3 -420: Query UNTERMINATED .................................................................................................. 54 
8-4-4 -440: Query UNTERMINATED after indefinite response ........................................................... 54 
8-5 100: Instrument-Dependent Command Errors ......................................................................................54 
8-5-1 101: Invalid value in list..............................................................................................................54 
8-5-2 103: Wrong units for parameter .................................................................................................54 
8-6 200: Instrument-Dependent Execution Errors.......................................................................................54 
8-6-1 200: Software Error....................................................................................................................54 
8-6-2 204: Data buffer was overrun..................................................................................................... 55 
8-6-3 205: Measurements were over-range........................................................................................55 
8-6-4 206: Timer was overrun .............................................................................................................55 
8-6-5 207: Bad data compression....................................................................................................... 55 
 

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GETTING STARTED

Introduction

Metrolab’s Three-axis Magnetometers are used to measure magnetic field

strength. Simultaneous measurement of all three components of the magnetic

field provides the total field no matter the orientation of the probe, which greatly

facilitates many measurement tasks such as field mapping. The extraordinarily

compact design, along with the optional ruggedized tablet, makes for a powerful,

autonomous and portable magnetometer, excellent for field use.

This manual covers the entire THM1176 family, including the following models:

A. THM1176-MF (“Three-axis Hall Magnetometer –Medium Field”),

B. THM1176-HF (“Three-axis Hall Magnetometer –High Field”),

C. THM1176-HFC (“Three-axis Hall Magnetometer –High Field Compact”),

D. THM1176-LF (“Three-axis Hall Magnetometer –Low Field”), and

E. TFM1186 (“Three-axis Fluxgate Magnetometer”).

For an overview of the capabilities of each of these instruments, please see

Chapter 3-Overview, Chapter 6-Technical Specifications and Chapter 7-

THM1176-MF/HF/HFC Sensor .

www.metrolab.com

The THM1176 family of instruments resembles other standard USB devices; it

and its software are easy to install and easy to use. Nonetheless, please take a

moment to browse through Chapter 2-Quick Start Guide and Chapter 3-Overview.

Pay particular attention to the cautionary notes.

It is easy to develop custom software for the THM1176 family; please see Chapter

4-Options for Computer Control, Chapter 5-USB Interface, and Chapter 8-Error

Codes.

Finally, keep your instrument accurate and up to date by having it recalibrated at

regular intervals. The recommended calibration interval is 18 months. You can

benefit from a discounted price for the calibration if you return your instrument to

Metrolab at a time that corresponds to our batch calibrations; please see Section

6-9 for details.

You can also download the latest firmware, software and manual, free of charge.

We post all updates on our website. Section 3-7 provides some additional details.

We hope that your Three-axis Magnetometer will help you perform your magnetic

field measurements easily and accurately. If you have problems and your reseller

cannot help you further, the Metrolab team is ready to help. Even if you don’t have

problems, we are always interested in knowing more about how our instruments

are used. Feel free to contact us at any time at [email protected].

www.metrolab.com

GETTING STARTED

Quick Start Guide

2-1 KIT CONTENTS

Your shipment should contain:

•A THM1176 or TFM1186

magnetometer. If you ordered a

“Duo Kit”, you will receive two

probes.

•A calibration certificate.

•A zero-gauss chamber, for

measuring and adjusting the probe’s

zero offset. The TFM1186 does not come with a zero-gauss chamber –see

the note in Section 2-6, Precautions.

•A USB thumb drive with the software and documentation.

•A carrying case.

•Optionally, if you ordered the Handheld Kit, a ruggedized Windows tablet.

In addition to the tablet itself, you should receive:

oa Mini-USB to USB-A adapter cable;

oa pistol grip with an extension battery; and

oa charger with adapter plugs for Europe/Switzerland, U.K., U.S. and

Australia.

2-2 WINDOWS SOFTWARE INSTALLATION AND REMOVAL

2-2-1 Software Installation

The order in which you perform the following steps is not important:

•Run the EZMag3D installer, Metrolab-EZMag3D-InstallerWindows.exe,

following the on-screen instructions.

•Run the installer for the libusbK device driver, InstallDriver.exe, following

the on-screen instructions.

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When the installation is complete, you will find a program link “EZMag3D

<version>”on your desktop. You will find the same program link in the folder

Metrolab of the Start Menu, alongside a link “EZMag3D <version> Manual”to the

online help. As usual, you can also access these items via a search.

2-2-2 Software Removal

•In the Explorer, delete the EZMag3D parameter folder shown in the

Settings screen. By default, it is in your AppData folder.

•Open the Apps & Features settings panel.

•Uninstall Metrolab EZMag3D.

•Uninstall UsbK Development Kit.

2-3 MACINTOSH SOFTWARE INSTALLATION AND REMOVAL

2-3-1 Software Installation

•Run the EZMag3D installer, Metrolab-EZMag3D-InstallerMacOs, following

the on-screen instructions.

Note that the default installation location is in your personal Applications folder,

not the system-wide Applications folder.

When the installation is complete, you will find the program EZMag3D in the folder

you specified during installation. In the same folder, you will also find a link

“EZMag3D Manual”to the online help. As usual, you can launch EZMag3D by

double-clicking its icon; you can also create an alias on the Dock or Desktop, or

you can launch it from a Spotlight search.

2-3-2 Software Removal

•In the Finder, delete the EZMag3D parameter folder shown in the Settings

screen. By default, this is ~/Library/Application Support/EZMag3D; since

your Library folder is usually hidden, you have to select the Finder's Go >

Go to Folder... menu item, and then enter ~/Library/Application

Support/EZMag3D.

•Open the program folder that you specified during installation

(~/Applications/EZMag3D <version> by default) and run the program

EZMag3D Uninstaller.

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2-4 STARTING TO MEASURE

•Start the EZMag3D software.

The first time you run EZMag3D, it will open the Connection Screen.

•Plug in the THM1176 or TFM1186.

The magnetometer will take approximately 10 seconds to boot and should

then appear on the Connection Screen, allowing you to connect to the

instrument.

•Place the probe in the magnet. On the THM1176-MF and THM1176-HF,

you can remove the probe cap to access narrow gaps –see Chapter 3-

Overview. See the EZMag3D Manual for details on using the software.

•(Does not apply to TFM1186 –see Section 2-6!) Check the offset before

each series of measurements by placing the probe in the Zero Gauss

Chamber. If the offset is higher than desired, leave the probe in the Zero

Gauss Chamber and perform the User Offset Correction procedure.

2-5 USING THE HANDHELD KIT

The ruggedized Windows tablet included in the Handheld Kit is like any other

Windows computer; all the procedures in the previous sections apply. Here are

some additional hints:

•Use the adapter included to plug the THM1176/TFM1186 into the tablet’s

Mini-USB connector.

•The Mini-USB connector is also used to recharge the tablet, so the tablet

cannot be recharged while measuring. However, a fully charged tablet

should provide roughly four hours of operation, making for a compact and

lightweight handheld solution.

•The hand strap on the back of the tablet is very practical, but it is

unfortunately made for using the tablet in portrait mode, which is not the

optimal orientation for EZMag3D.

•The pistol grip, on the other hand, places the tablet in landscape mode,

and also dramatically extends the battery life, to more than a day. In fact,

by plugging the power supply into the pistol grip rather than the tablet itself,

you can recharge while measuring. However, note the precautions below.

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2-6 PRECAUTIONS

CAUTION

High magnetic field gradients –as found, for example, around an MRI or NMR

spectroscopy magnet –will subject the USB connector and the tablet to strong

forces. To prevent injury from flying objects or whiplashing cables, be sure to

hold these components securely when you are around a strong magnet.

NOTICE

Do not bend the probe cable sharply. This is a special cable with individually

shielded signal wires, in order to minimize induction artifacts. Sharp bends

break the shielding.

This product conforms to the WEEE Directive of the European

Union (2002/96/EC) and belongs to Category 9 (Monitoring and

Control Instruments). For proper environment friendly disposal,

you can return the instrument free of charge to us or our local

distributor.

SPECIAL NOTICE FOR THE TABLET

When the tablet’s battery level drops below 10%, the THM1176/TFM1186 will

no longer function (BIOS > v. 1.11). This is because the tablet’s USB port,

acting as a USB host, supplies power to the instrument, and must switch back

to USB device mode in order to be able to charge the tablet. This should

happen before the battery is completely depleted to avoid the USB port being

permanently stuck in host mode.

To use the pistol grip for additional battery power, press the button on the back

of the pistol grip for 1 second, to enable its power output. You should see the

tablet’s power LED turn red, and the Windows “charging battery” icon. Press

the button on the pistol grip for 3 seconds to disable its power output.

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