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Model 231


Rev. 1.5
P/N 119-021
19 May 2004



Users Manual



Model 231

/

231P

Temperature Transmitter


Includes Coverage for:
Model 2308-01 Benchtop Enclosure
Model 2308-12 VMEbus Rackmount Case

For Use With The Following Lake Shore Sensors:
Model DT-414 Unencapsulated Silicon Diode Temperature Sensors
Series DT-420 Miniature Silicon Diode Temperature Sensors
Series DT-470 Silicon Diode Temperature Sensors
Series DT-471 Silicon Diode Temperature Sensors
Series DT-670 Silicon Diode Temperature Sensors
Series PT-100 Platinum Resistance Thermometers
Series TG-120 GaAlAs Diode Temperature Sensors




Lake Shore Cryotronics, Inc.
575 McCorkle Boulevard
Westerville, Ohio 43082-8888 USA

E-Mail Addresses:
sales@lakeshore.com
service@lakeshore.com

Visit Our Website:
www.lakeshore.com

Fax: (614) 891-1392
Telephone: (614) 891-2243


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. Lake Shore Model 231 Users Manual


A
LIMITED WARRANTY STATEMENT WARRANTY PERIOD: ONE (1) YEAR
1. Lake Shore warrants that this Lake Shore product (the Product) will be free from defects in materials
and workmanship for the Warranty Period specified above (the Warranty Period). If Lake Shore receives
notice of any such defects during the Warranty Period and the Product is shipped freight prepaid, Lake Shore
will, at its option, either repair or replace the Product if it is so defective without charge to the owner for
parts, service labor or associated customary return shipping cost. Any such replacement for the Product may
be either new or equivalent in performance to new. Replacement or repaired parts 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 it has been sold by an authorized Lake Shore employee, sales
representative, dealer or original equipment manufacturer (OEM).
3. The Product may contain remanufactured parts equivalent to new in performance or may have been
subject to incidental use.
4. The Warranty Period begins on the date of delivery of the Product or later on the date of installation of the
Product if the Product is installed by Lake Shore, provided that if you schedule or delay the Lake Shore
installation for more than 30 days after delivery the Warranty Period begins on the 31st day after delivery.
5. This limited warranty does not apply to defects in the Product resulting from (a) improper or inadequate
maintenance, repair or calibration, (b) fuses, software and non-rechargeable 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 or (f) improper site preparation or maintenance.
6. To the extent allowed by applicable law, the above warranties are exclusive and no other warranty or
condition, whether written or oral, is expressed or implied. Lake shore specifically disclaims any implied
warranties or conditions of merchantability, satisfactory quality and/or fitness for a particular purpose with
respect to the product. Some countries, states or provinces do not allow limitations on an implied warranty,
so the above limitation or exclusion might not apply to you. This warranty gives you specific legal rights and
you might also have other rights that vary from country to country, state to state or province to province.
7. To the extent allowed by applicable law, the remedies in this warranty statement are your sole and
exclusive remedies.
8. Except to the extent prohibited by applicable law, in no event will lake shore or any of its subsidiaries,
affiliates or suppliers be liable 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, and whether or not lake shore has been
advised of the possibility of such damages. Your use of the Product is entirely at your own 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.
9. Except to the extent allowed by applicable law, the terms of this limited warranty statement do not
exclude, restrict or modify, and are in addition to, the mandatory statutory rights applicable to the sale of the
product to you.
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 accuracy
and calibration of this product at the time of shipment are traceable to the United States National Institute of
Standards and Technology (NIST); formerly known as the National Bureau of Standards (NBS), or to a
recognized natural standard.
TRADEMARK ACKNOWLEDGEMENT
Manufacturers and sellers claim many designations as trademarks to distinguish their products. Where those
designations appear in this manual and Lake Shore was aware of a trademark claim, the designations appear
in initial capital letters with a or
®
symbol.
Apiezon
®
is a trademark of Biddle Instruments.
CalCurve, Carbon-Glass, Cernox, Duo-Twist, High-Temperature Cernox, Quad-Lead,
Quad-Twist, Rox, SoftCal, and Thermox are trademarks of Lake Shore Cryotronics, Inc.
Teflon
®
is a trademark of DuPont De Nemours.


Copyright © 1993, 1998, 1999, 2001 and 2004 by 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 express written permission of Lake Shore. Lake Shore Model 231 Users Manual



B

Declaration of Conformity


We:

Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, OH 43082-8888

hereby declare that the equipment specified conforms to the
following Directives and Standards.

Application of Council Directives:
89/336/EEC

Standard to which Conformity is declared:
EN55022,
EN50082-1

Type of Equipment:
Temperature Transmitter

Model Number:
231



______________________________________________ __________________________________
Signature Date

John M. Swartz
Printed Name

President
Position


Manual Addendum on EMC for the Model 231 or 231P
Electromagnetic Compatibility (EMC) of electronic equipment is a growing
concern worldwide. Emissions of and immunity to electromagnetic
interference is now part of most electronics design and manufacture. To
qualify for the CE mark, the Model 231 meets the generic requirements of
the European EMC directive 89/336/EEC. Under that directive, the Model
231 must comply with standard IEC-801-4 dealing with electrostatic
discharge (ESD). The 231 temperature transmitter is an exposed printed
circuit board; protect it from ESD with a VME rack or similar enclosure. ESD
testing was performed on the instrument front panel and connectors
exposed during normal operation.
Lake Shore Model 231 Users Manual


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Lake Shore Model 231 Users Manual


Table of Contents
i
TABLE OF CONTENTS

Chapter/Paragraph Title
Page
1 INTRODUCTION.......................................................................... 1-1
1.0 Gener