Lake Shore Cryotronics F71 User manual

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User’s Manual
Teslameter
F71 Multi-axis teslameter
F41 Single-axis teslameter
Software Version 1.4
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio
43082-8888 USA
[email protected]
[email protected]
www.lakeshore.com
Fax: [phone]
Telephone: [phone]
Methods and apparatus disclosed and described herein have been developed solely on company funds of Lake Shore
Cryotronics, Inc. No government or other contractual support or relationship whatsoever has existed which in any
way affects or mitigates proprietary rights of Lake Shore Cryotronics, Inc. in these developments. Methods and
apparatus disclosed herein may be subject to U.S. Patents existing or applied for.
Lake Shore Cryotronics, Inc. reserves the right to add, improve, modify, or withdraw functions, design modifications,
or products at any time without notice. Lake Shore shall not be liable for errors contained herein or for incidental or
consequential damages in connection with furnishing, performance, or use of this material.
Rev. 1.4 1 July 2019

F71/F41 Teslameter
LIMITED WARRANTY STATEMENT
WARRANTY PERIOD: THREE (3) YEARS
1.Lake Shore warrants that products manufactured by Lake Shore (the
"Product") will be free from defects in materials and workmanship for
three years from the date of Purchaser's physical receipt of the Prod-
uct (the "Warranty Period"). If Lake Shore receives notice of any such
defects during the Warranty Period and the defective Product is
shipped freight prepaid back to Lake Shore, Lake Shore will, at its
option, either repair or replace the Product (if it is so defective) with-
out charge for parts, service labor or associated customary return
shipping cost to the Purchaser. Replacement for the Product may be
by either new or equivalent in performance to new. Replacement or
repaired parts, or a replaced Product, will be warranted for only the
unexpired portion of the original warranty or 90 days (whichever is
greater)..
2.Lake Shore warrants the Product only if the Product has been sold
by an authorized Lake Shore employee, sales representative, dealer or
an authorized Lake Shore original equipment manufacturer (OEM).
3.The Product may contain remanufactured parts equivalent to new
in performance or may have been subject to incidental use when it is
originally sold to the Purchaser.
4.The Warranty Period begins on the date the Product ships from Lake
Shore’s plant.
5.This limited warranty does not apply to defects in the Product
resulting from (a) improper or inadequate installation (unless OT&V
services are performed by Lake Shore), maintenance, repair or calibra-
tion, (b) fuses, software, power surges, lightning and non-recharge-
able batteries, (c) software, interfacing, parts or other supplies not
furnished by Lake Shore, (d) unauthorized modification or misuse, (e)
operation outside of the published specifications, (f) improper site
preparation or site maintenance (g) natural disasters such as flood,
fire, wind, or earthquake, or (h) damage during shipment other than
original shipment to you if shipped through a Lake Shore carrier.
6.This limited warranty does not cover: (a) regularly scheduled or ordi-
nary and expected recalibrations of the Product; (b) accessories to the
Product (such as probe tips and cables, holders, wire, grease, varnish,
feed throughs, etc.); (c) consumables used in conjunction with the
Product (such as probe tips and cables, probe holders, sample tails,
rods and holders, ceramic putty for mounting samples, Hall sample
cards, Hall sample enclosures, etc.); or, (d) non-Lake Shore branded
Products that are integrated with the Product.
7. To the extent allowed by applicable law,, this limited warranty is the
only warranty applicable to the Product and replaces all other war-
ranties or conditions, express or implied, including, but not limited to,
the implied warranties or conditions of merchantability and fitness
for a particular purpose. Specifically, except as provided herein,
Lake Shore undertakes no responsibility that the products will be fit
for any particular purpose for which you may be buying the Products.
Any implied warranty is limited in duration to the warranty period.
No oral or written information, or advice given by the Company, its
Agents or Employees, shall create a warranty or in any way increase
the scope of this limited warranty. Some countries, states or provinces
do not allow limitations on an implied warranty, so the above limita-
tion or exclusion might not apply to you. This warranty gives you spe-
cific legal rights and you might also have other rights that vary from
country to country, state to state or province to province.
8.Further, with regard to the United Nations Convention for Interna-
tional Sale of Goods (CISC,) if CISG is found to apply in relation to this
agreement, which is specifically disclaimed by Lake Shore, then this
limited warranty excludes warranties that: (a) the Product is fit for the
purpose for which goods of the same description would ordinarily be
used, (b) the Product is fit for any particular purpose expressly or
impliedly made known to Lake Shore at the time of the conclusion of
the contract. (c) the Product is contained or packaged in a manner
usual for such goods or in a manner adequate to preserve and protect
such goods where it is shipped by someone other than a carrier hired
by Lake Shore.
9. Lake Shore disclaims any warranties of technological value or of
non-infringement with respect to the Product and Lake Shore shall
have no duty to defend, indemnify, or hold harmless you from and
against any or all damages or costs incurred by you arising from the
infringement of patents or trademarks or violation or copyrights by
the Product.
10.THIS WARRANTY IS NOT TRANSFERRABLE. This warranty is not
transferrable.
11.Except to the extent prohibited by applicable law, neither Lake
Shore nor any of its subsidiaries, affiliates or suppliers will be held lia-
ble for direct, special, incidental, consequential or other damages
(including lost profit, lost data, or downtime costs) arising out of the
use, inability to use or result of use of the product, whether based in
warranty, contract, tort or other legal theory, regardless whether or
not Lake Shore has been advised of the possibility of such damages.
Purchaser's use of the Product is entirely at Purchaser's risk. Some
countries, states and provinces do not allow the exclusion of liability
for incidental or consequential damages, so the above limitation may
not apply to you.
12.This limited warranty gives you specific legal rights, and you may
also have other rights that vary within or between jurisdictions where
the product is purchased and/or used. Some jurisdictions do not allow
limitation in certain warranties, and so the above limitations or exclu-
sions of some warranties stated above may not apply to you.
13.Except to the extent allowed by applicable law, the terms of this
limited warranty statement do not exclude, restrict or modify the
mandatory statutory rights applicable to the sale of the product
to you.

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CERTIFICATION
Lake Shore certifies that this product has been inspected and tested
in accordance with its published specifications and that this product
met its published specifications at the time of shipment. The accu-
racy and calibration of this product at the time of shipment are trace-
able to the United States National Institute of Standards and
Technology (NIST); formerly known as the National Bureau of Stan-
dards (NBS).
FIRMWARE LIMITATIONS
Lake Shore has worked to ensure that the firmware is as free of errors
as possible, and that the results you obtain from the instrument are
accurate and reliable. However, as with any computer-based soft-
ware, the possibility of errors exists.
In any important research, as when using any laboratory equipment,
results should be carefully examined and rechecked before final con-
clusions are drawn. Neither Lake Shore nor anyone else involved in
the creation or production of this firmware can pay for loss of time,
inconvenience, loss of use of the product, or property damage caused
by this product or its failure to work, or any other incidental or conse-
quential damages. Use of our product implies that you understand
the Lake Shore license agreement and statement of limited warranty.
FIRMWARE LICENSE AGREEMENT
The firmware in this instrument is protected by United States copy-
right law and international treaty provisions. To maintain the war-
ranty, the code contained in the firmware must not be modified. Any
changes made to the code is at the user's risk. Lake Shore will assume
no responsibility for damage or errors incurred as result of any
changes made to the firmware.
FIRMWARE LICENSE AGREEMENT CONTINUED
Under the terms of this agreement you may only use the firmware as
physically installed in the instrument. Archival copies are strictly for-
bidden. You may not decompile, disassemble, or reverse engineer the
firmware. If you suspect there are problems with the firmware, return
the instrument to Lake Shore for repair under the terms of the Lim-
ited Warranty specified above. Any unauthorized duplication or use
of the firmware in whole or in part, in print, or in any other storage
and retrieval system is forbidden.
TRADEMARK ACKNOWLEDGMENT
Many manufacturers and sellers claim designations used to distin-
guish their products as trademarks. Where those designations
appear in this manual and Lake Shore was aware of a trademark
claim, they appear with initial capital letters and the ™ or ® symbol.
MeasureReady™, CalCurve™, Cernox®, SoftCal™, Rox™, 2Dex™, Tilt-
View™, and TruZero™ are trademarks of Lake Shore Cryotronics, Inc.
Java™ is a registered trademark of Sun Microsystems, Inc.
of Santa Clara, CA
LabVIEW® is a registered trademark of National Instruments.
Mac® is a registered trademark of Apple, Inc., registered in the U.S and
other countries.
Microsoft Windows®, Excel®, and Windows Vista® are registered
trademarks of Microsoft Corporation in the United States and other
countries.
Stycast® is a trademark of Henkel IP & Holding GMBH.
WinZip™ is a registered trademark of Corel Corporation.
USB Type-C™ and USB-C are trademarks of USB Implementers
Forum.
Copyright 2018–2019 Lake Shore Cryotronics, Inc. All rights reserved. No portion of this manual may be reproduced
stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying,
recording, or otherwise, without the express written permission of Lake Shore.

F71/F41 Teslameter
EU DECLARATION OF CONFORMITY
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Manufacturer:
Lake Shore Cryotronics, Inc.
575 McCorkle Boulevard
Westerville, OH 43082
USA
Object of the declaration:
Model(s): F41, F71
Description: Single-axis (F41) and Multi-axis (F71) Teslameter
The object of the declaration described above is in conformity with the relevant Union harmonization
legislation:
2014/53/EU Radio Equipment Directive
References to the relevant harmonized standards used to the specification in relation to which conformity is
declared, full or in part:
EN 62368-1:2014
Overvoltage Category II
Pollution Degree 2
EN 301 489-17 V3.2.0:2017
EN 301 489-1 V2.1.1:2017
EN 61000-3-2:2014
EN 61000-3-3:2013
Signed for and on behalf of:
Place, Date:
Westerville, OH USA Scott Ayer
04-MAY-2018 Director of Quality & Compliance

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Electromagnetic Compatibility (EMC) for the F71/F41 Teslameter
Electromagnetic Compatibility (EMC) of electronic equipment is a growing concern worldwide. Emissions of and
immunity to electromagnetic interference is now part of the design and manufacture of most electronics. To qualify
for the CE Mark, the teslameter meets or exceeds the requirements of the European Radio Equipment Directive
2014/53/EU.
The instrument was tested under normal operating conditions with sensor and interface cables attached. If the
installation and operating instructions in this user's manual are followed, there should be no degradation in EMC
performance.
Exposure to RF interference greater than that found in a typical laboratory environment may disturb the sensitive
measurement circuitry of the instrument.
Pay special attention to instrument cabling. Improperly installed cabling may defeat even the best EMC protection.
For the best performance from any precision instrument, follow the grounding and shielding instructions in the
user's manual. In addition, the installer of the instrument should consider the following:
DShield measurement and computer interface cables.
DLeave no unused or unterminated cables attached to the instrument.
DMake cable runs as short and direct as possible. Higher radiated emissions are possible with long cables.
DDo not tightly bundle cables that carry different types of signals.

F71/F41 Teslameter
FCC and IC Compatibility for the F71/F41 Teslameter
The radio transmitter/receiver in the teslameter adheres to Federal Communications Commission (FCC) and Indus-
try Canada (IC) requirements. The teslameter contains the following certification numbers:
FCC ID: TFB-TIWI-01
IC: 5969A-TIWI101
This device is granted for use in mobile-only configurations in which the antennas used for this transmitter must be
installed to provide a separation distance of at least 20 cm from all persons, and not be co-located with any other
transmitters except in accordance with FCC and Industry Canada multi-transmitter product procedures.

i
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Table of Contents
Chapter 1:
Introduction
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Connectivity and Usability–Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3.1 Physical Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Hall Probe Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.6 Safety Summary and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2:
Installation
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Inspection and Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.1 TiltView™ Touchscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.1 Field Control Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.2 Line Input Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.3 Digital I/O Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.4.4 Probe Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4.5 Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Chapter 3:
Operation
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Instrument Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.3 Display Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.1 Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.4 Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.4.1 Measurement Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.4.2 Averaging Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.4.3 Autorange and Range Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4.4 Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4.5 Frequency (AC modes only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.4.6 Max Hold Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4.7 Relative Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.4.8 Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.9 Screen Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5 Advanced Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.5.1 Sensor Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5.2 Field Control (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.5.3 Buffered Data Streaming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.5.4 Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.5.5 Digital I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.5.6 Temperature Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.5.7 Cryogenic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
3.5.8 Probe High-Frequency Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.5.9 System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.5.10 Factory Reset Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3.5.11 Firmware Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.6 Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
3.6.1 General Probe Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.6.2 Probe Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.6.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.6.4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

ii TABLE OF CONTENTS
F41/F71 Teslameter
Chapter 4:
Computer
Interface Operation
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2 Standard Commands for Programmable Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2.1 Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2.2 Queries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.3 Optional Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.4 Short and Long Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.5 Number Suffix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.6 Multiple Commands in a Single Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.7 Terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.2.8 Message Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.3 Status and Error Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3.1 Status System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3.2 Register Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.3.3 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.4 Remote Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.4.1 USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.4.2 Ethernet and Wi-Fi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4.4.3 SCPI over TCP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.5 Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.5.1 Common Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.5.2 SCPI Subsystem Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Chapter 5:
Probes and
Accessories
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
5.2 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
5.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
5.4 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
5.4.1 Full Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
5.4.2 Half Rack Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Chapter 6:
Service
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.2 General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3 USB Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.1 New Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.2 Existing Installation No Longer Working . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.3 Intermittent Lockups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.4 Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.5 Error and Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.6 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
6.7 Rear Panel Connector Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.8 Summary of Internal Memory Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.9 Technical Inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.9.1 Contacting Lake Shore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.9.2 Return of Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.9.3 RMA Valid Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
6.9.4 Shipping Charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
6.9.5 Restocking Fee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

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Chapter 1: Introduction
1.1 Overview Perfect for measuring magnetic fields in a wide variety of applications, Lake Shore’s
F71 and F41 teslameters with FP Series probes offer a new level of precision, conve-
nience, and dependability. Some applications include:
DScientific and materials research
DQuality control for magnet manufacturing and assemblies
DElectromagnet system control
DMagnetizing pulse capture
DStray field detection and safety
DElectric motor design
DHigh resolution magnetic field mapping
1.2 Features Features of the F71 and F41 teslameters include:
DDC and RMS measurement
DPeak to peak measurement
DAutoranging
DVariable averaging window
DMin/Max hold
DRelative readings
DTemperature compensation
DFrequency measurement of field
DTruZero™ technology to reduce measurement noise and offset
DTiltView™ touchscreen for improved viewing angles
DSmaller, ultra-thin Hall sensor active areas for improved accuracy
DMultiple probe types to suit your application
DFast warm up
DIsolated input and output relays
DAnalog Hall voltage output
DCorrected field reading voltage output
D3-year standard warranty
DHigh-speed data acquisition
DField control option
DUSB, Ethernet and Wi-Fi connectivity
For full feature information, please see our website:
https://www.lakeshore.com/teslameters

2cHAPTER 1: Introduction
F71/F41 Teslameter
1.3 Connectivity
and Usability—
Communication
Options
1.3.1 Physical
Connectivity
Wi-Fi, USB, and Ethernet connectivity provide convenient integration with systems
using LabVIEW™, IVI.NET, Python, and other software. Interfacing is straightforward
using
IVI class drivers and industry-standard SCPI commands.
DUSB computer interface: provides direct serial communication by emulating a
standard RS-232 connection
DEthernet: allows full control and reporting throughout an IP network
DWLAN/Wi-Fi: provides wireless access for web applications
1.4 Hall Probe
Selection
Full details on FP Series probes are provided on our website. Please see:
https://www.lakeshore.com/products/categories/overview/magnetic-products/hall-
probes/fp-series-hall-probes.
FIGURE 1-1 Communications connections

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1.5 Specifications Full specifications about the F71/F41 teslameter are provided on our website. Please
see: https://www.lakeshore.com/products/categories/specification/magnetic-
products/gaussmeters-teslameters/f71-and-f41-teslameters.
Feature Description
Power requirement 100 V to 240 V (universal input), 50 Hz to 60 Hz, 30 VA
Size 216 mm wide × 87 mm high × 369 mm deep
(8.5 in × 3.4 in × 14.5 in), half rack
Weight 3.2 kg (7 lb)
Approval CE mark, FCC, Giteki mark
Operating conditions
Rated accuracy 18 °C to 28 °C, <70% relative humidity non-condensing
Reduced accuracy -20 °C to 70 °C, <90% relative humidity non-condensing
TABLE 1-1 Key specifications

4cHAPTER 1: Introduction
F71/F41 Teslameter
1.6 Safety
Summary and
Symbols
Observe these general safety precautions during all phases of instrument operation,
service, and repair. Failure to comply with these precautions or with specific warn-
ings elsewhere in this manual violates safety standards of design, manufacture, and
intended instrument use. Lake Shore Cryotronics, Inc. assumes no liability for user
failure to comply with these requirements.
The F71/F41 teslameter protects the operator and surrounding area from electric
shock or burn, mechanical hazards, excessive temperature, and spread of fire from
the instrument. Environmental conditions outside of the conditions below may pose
a hazard to the operator and surrounding area.
DIndoor use
DAltitude to 2000 m
D-20 °C to 70 °C, <90% relative humidity non-condensing
DOvervoltage category II
DPollution degree 2
Ground the Instrument
To minimize shock hazard, the instrument is equipped with a 3-conductor AC power
cable. Plug the power cable into an approved 3-contact electrical outlet or use a
3-contact adapter with the grounding wire (green) firmly connected to an electrical
ground (safety ground) at the power outlet. The power jack and mating plug of the
power cable meet Underwriters Laboratories (UL) and International Electrotechnical
Commission (IEC) safety standards.
Ventilation
The instrument has ventilation holes in its side covers. Do not block these holes when
the instrument is operating.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes. Opera-
tion of any electrical instrument in such an environment constitutes a definite safety
hazard.
Keep Away from Live Circuits
Operating personnel must not remove instrument covers. Refer component replace-
ment and internal adjustments to qualified maintenance personnel. Do not replace
components with power cable connected. To avoid injuries, always disconnect power
and discharge circuits before touching them.
Child Safety
This equipment is not suitable for use in locations where children are likely to be pres-
ent.
Do Not Substitute Parts or Modify Instrument
Do not install substitute parts or perform any unauthorized modification to the
instrument. Return the instrument to an authorized Lake Shore Cryotronics, Inc. rep-
resentative for service and repair to ensure that safety features are maintained.
Cleaning
Do not submerge instrument. Clean only with a damp cloth and mild detergent. Exte-
rior only.
Desktop Installation
When installing the instrument in a desktop environment, ensure it is mounted on a
flat, level surface.

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Improper Use
If the instrument is used in a manner that is not specified by Lake Shore, the safety
protections provided by the instrument are no longer guaranteed, and may be
impaired.
FIGURE 1-2 Safety symbols
!
Direct current (power line) Equipment protected throughout
by double insulation or reinforces
insulation (equivalent to Class II of
IEC 536—see Annex H)
CAUTION: High voltages; danger of
electric shock; background color:
yellow; symbol and outline: black
CAUTION or WARNING: See
instrument documentation;
background color: yellow;
symbol and outline: black
Off (supply)
On (supply)
Frame or chassis terminal
Protective conductor terminal
Earth (ground) terminal
3Three-phase alternating current (power line)
Alternating or direct current (power line)
Alternating current (power line)

6cHAPTER 1: Introduction
F71/F41 Teslameter

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Chapter 2: Installation
2.1 General This chapter provides general installation instructions for the F71/F41 teslameter.
Please read this entire chapter before installing the instrument and powering it on to
ensure the best possible performance and to maintain safety.
2.2 Inspection and
Unpacking
Inspect shipping containers for external damage before opening them. Photograph
any container that has significant damage before opening it. Inspect all items for
both visible and hidden damage that occurred during shipment. If there is visible
damage to the contents of the container, contact the shipping company and
Lake Shore immediately, preferably within five days of receipt of goods, for instruc-
tions on how to file a proper insurance claim. Lake Shore products are insured against
damage during shipment, but a timely claim must be filed before Lake Shore will take
further action. Procedures vary slightly with shipping companies. Keep all damaged
shipping materials and contents until instructed to either return or discard them.
Open the shipping container and keep the container and shipping materials until all
contents have been accounted for. Check off each item on the packing list as it is
unpacked. Instruments themselves may be shipped as several parts. The items
included with the F71/F41 teslameter are listed below. Contact Lake Shore immedi-
ately if there is a shortage of parts or accessories. Lake Shore is not responsible for any
missing items if not notified within 60 days of shipment.
If you need to return the instrument for recalibration, replacement or repair, a return
authorization (RMA) number must be obtained from a Lake Shore representative.
Refer to section 6.9.3 for the Lake Shore RMA procedure.
Probes are shipped in cardboard containers and are often included in the instrument
shipping carton. Please retain the probe container for probe storage. This will help
protect the delicate probe from being damaged.
Items Included with F71/F41 teslameter:
DF71/F41 teslameter
D6-pin terminal block, two count
DLine power cord
DWi-Fi antenna
DUSB A to USB-Type C™ adapter
DQuick Start Guide

8cHAPTER 2: Installation
F71/F41 Teslameter
2.3 Front Panel The F71/F41 teslameter has a 5 in capacitive touch, color TFT display with LED back-
light, which is used to control the instrument and display relevant output settings
and the instrument state.
2.3.1 TiltView™
Touchscreen
The TiltView™ feature makes seeing the screen and operating the touch interface
comfortable from any angle, even when mounted in a rack. The screen adjusts from a
0° to a 47° viewing angle, whether mounted in a rack or on a bench top.
FIGURE 2-1 F71/F41 teslameter front panel
Connector Description
1 Power button The power button turns the instrument power on and off.
2 TiltView™ touchscreen The screen adjusts from a 0° to a 37° viewing angle, whether mounted in a
rack or on a bench top.
TABLE 2-1 Front panel connections
FIGURE 2-2 TiltView™ angle comparison

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2.4 Rear Panel This section provides a description of the F71/F41 teslameter rear panel connections.
FIGURE 2-3 F71/F41 teslameter rear panel
Connector Description
1 Option card slot Field control option
2 Line input assembly Power is provided through the line input assembly.
3USBType-C™interface Connect to USB devices such as flash drives. Currently, only used
for firmware updates.
4USB serial communications inter-
face
The USB interface is provided to connect with most modern com-
puters.
5 RJ-45 Ethernet interface The Ethernet interface is provided to allow connection to a com-
puter network.
6 WLAN antenna connector The Wi-Fi antenna attaches to this coax connector.
7 Digital I/O port For general purpose input/output connection or trigger output
functionality. More information is provided in section 3.5.5.
8 Probe input connector 26-pin mini D-sub for Hall probes.
9 BNC analog output connector Outputs the raw amplified Hall voltage signal. See section 2.4.5.
TABLE 2-2 Rear panel connections
q
oi
u
y
t
r
e
w

10 cHAPTER 2: Installation
F71/F41 Teslameter
2.4.1 Field Control
Module
The F71/F41 teslameter can be fitted with a field control option card that provides a
high precision control voltage output for electromagnet systems. The stable and
accurate probe field measurement completes the closed-loop control configuration.
The instrument, probe, power supply, magnet, and control parameters play import-
ant roles in establishing stable field control. See section 3.5.2.
Field control is only available for single-axis probes. The averaging window does not
affect field control behavior.
The field control option card's only connection is to the J4 connector on the main
board. See the separate installation instructions that came with the option card if you
are adding the option card yourself.
2.4.2 Line Input
Assembly
This section describes how to properly connect the F71/F41 teslameter to line power.
Please follow these instructions carefully to ensure proper operation of the instru-
ment and the safety of operators.
2.4.2.1 Power Cord
The F71/F41 teslameter includes a 3-conductor power cord that mates with the IEC
320-C14 line cord receptacle. Line voltage is present on the two outside conductors
and the center conductor is a safety ground. The safety ground attaches to the instru-
ment chassis and protects the user in case of a component failure.
Always plug the power cord into an easily accessible, properly grounded receptacle to
ensure safe instrument operation.
If the power supply cord is damaged or lost, it must be replaced. Contact Lake Shore for a
replacement to ensure proper voltage, current and type of cord.
FIGURE 2-4 Field control option card placement
FIGURE 2-5 Line input assembly

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2.4.3 Digital I/O Port See section 3.5.5 for features of the digital I/O port.
2.4.4 Probe Input
Connector
This section describes the probe input connection and pin-out details.
The Lake Shore Hall probe plugs into the 26-pin mini D-sub socket on the rear panel.
Align the probe connector with the probe input socket and push straight in. The con-
nector is push-to-lock. You should hear a clicking sound if the connector is fully
seated.
An electrically erasable programmable read only memory (EEPROM chip) is included
in each probe. The EEPROM chip stores specific information that the teslameter
requires for operation. The information includes serial number, probe sensitivity, field
compensation data, temperature compensation data, and calibration data. When a
new probe is connected, the instrument reads parameters from probe memory and
the probe is ready to use. A new probe can be connected at any time even while the
instrument is turned on.
2.4.4.1 Probe Handling
To avoid damage and for best results during use, probes have a number of handling
and accuracy requirements that must be observed.
Some probes used with the teslameter have conductive parts. Never probe near exposed
live voltage. Personal injury and damage to the instrument may result.
Force should never be applied to the tip of the probe. On all probes, do not pinch or
allow cables to be struck by any heavy or sharp object. Damaged or severed cables
may be returned to Lake Shore for repair but probes are not always repairable.
The cardboard and foam container that Lake Shore probes are shipped in should be
retained for probe storage and for return shipping for periodic probe recalibration.
For additional probe details, please see section 3.6.
FIGURE 2-6 Digital I/O port
FIGURE 2-7 Probe input connector

12 cHAPTER 2: Installation
F71/F41 Teslameter
2.4.5 Analog Output The F71/F41 teslameter has an analog output that can provide a DC voltage propor-
tional to the corrected field measurement or the amplified raw Hall voltage. This set-
ting can be configured through the front panel or through the remote interfaces.
Connect an oscilloscope or data acquisition system to the output BNC to analyze the
readings.
The shell of the analog output BNC is connected directly to the instrument ground.
Connecting it incorrectly could cause additional noise in the measurement or dam-
age to the electronics.
The analog output can provide up to +/-15V.
FIGURE 2-8 Analog output