Lake Shore 231 Manuale utente

Rev. 1.8 P/N 119-021 03 October 2013

User’s 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:

[email protected]

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 User’s Manual

LIMITED WARRANTY STATEMENT –WARRANTY PERIOD: THREE (3) YEAR

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 Product (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)

without 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 of Purchaser's physical receipt of the Product or later

on the date of operational training and verification (OT&V) of the Product if the service is

performed by Lake Shore, provided that if the Purchaser schedules or delays the Lake Shore

OT&V for more than 30 days after delivery then the Warranty Period begins on the 31st day

after Purchaser's physical receipt of the Product.

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 calibration, (b) fuses, software, power surges, lightning 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, (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 ordinary 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 warranties 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 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.

8. Further, with regard to the United Nations Convention for International 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 liable for direct, special, incidental, consequential

Rev. 1.8 P/N 119-021 03 October 2013

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

exclusions of some warranties stated above may not apply to you.

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. 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.

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 User’s Manual

Table of Contents

TABLE OF CONTENTS

Chapter/Paragraph Title Page

1 INTRODUCTION..........................................................................1-1

1.0 General..........................................................................1-1

1.1 Model 231 System Description......................................1-1

1.2 Single Enclosure Case Description................................1-6

1.3 Multiple Unit Enclosure Case Description......................1-7

2 INSTALLATION...........................................................................2-1

2.0 General..........................................................................2-1

2.1 Inspection and Unpacking..............................................2-1

2.2 Repackaging For Shipment ...........................................2-1

2.3 Sensor Installation Recommendations...........................2-2

2.3.1 Two-Lead vs. Four-Lead Measurements....................2-2

2.3.1.1 Two-Lead Measurements.......................................2-2

2.3.1.2 Four-Lead Measurements ......................................2-3

2.3.2 Connecting Leads To The Sensor..............................2-3

2.3.3 Sensor Mounting........................................................2-3

2.3.4 Measurement Errors Due To AC Noise......................2-4

2.4 Sensor Curve Definition.................................................2-5

2.5 Power Connections........................................................2-6

3 OPERATION................................................................................3-1

3.0 General..........................................................................3-1

3.1 PCB DIP Switch Settings...............................................3-1

3.2 Output to Temperature Conversion ...............................3-2

4 SERVICE .....................................................................................4-1

4.0 General..........................................................................4-1

4.1 General Troubleshooting ...............................................4-1

4.1.1 No Output (On-Board LED Off)..................................4-1

4.1.2 Output Stops Before Reaching Upper Limit ...............4-1

4.1.3 Output Is Incorrect Value (Small Error) ......................4-1

4.1.4 Output Is Incorrect Value (Large Error)......................4-2

4.2 Model 231 Connector Definitions...................................4-2

4.3 Calibration......................................................................4-3

4.3.1 Test Equipment Required...........................................4-3

4.3.2 Reference Calibration.................................................4-4

4.3.3 Output Calibration ......................................................4-5

Lake Shore Model 231 User’s Manual

Table of Contents

TABLE OF CONTENTS (Continued)

Chapter/Paragraph Title Page

5 OPTIONS AND ACCESSORIES .................................................5-1

5.0 General..........................................................................5-1

5.1 Enclosures.....................................................................5-1

5.2 Options...........................................................................5-1

5.3 Accessories....................................................................5-2

5.4 Wires..............................................................................5-2

5.5 Sensors..........................................................................5-3

5.6 Special Equipment.........................................................5-3

APPENDIX A –MODEL 231 CURVE TABLES................................. A-1

APPENDIX B –GLOSSARY OF TERMINOLOGY............................ B-1

LIST OF ILLUSTRATIONS

Figure No. Title Page

1-1 Typical Model 231 Front Panel..............................................1-2

1-2 Single Enclosure Case Physical Dimensions........................1-6

1-3 Multiple Unit Case Physical Dimensions...............................1-8

2-1 Typical Wall Plug-In Power Supply .......................................2-7

3-1 Model 231 DIP Switch (S1)...................................................3-1

4-1 Front Panel Connectors J2 & J3 Details ...............................4-2

4-2 VMEbus Connector J1 Details ..............................................4-3

4-3 Model 231 PCB Layout.........................................................4-4

LIST OF TABLES

Table No. Title Page

1-1 Model 231 Input Specifications .............................................1-3

1-2 Model 231P Input Specifications...........................................1-4

1-3 Model 231 & 231P Output Specifications..............................1-5

1-4 Model 2308-12 VMEbus Rackmount Case Specs ................1-7

2-1 Effect of Current Variation on Diode Temperature................2-5

2-2 Typical DT-470 dV/dI Values for Selected Temps.................2-5

3-1 Conversion Parameters for Temperature in K.......................3-2

A-1 Lake Shore Standard Diode Curves......................................A-1

A-2 Series PT-100 Platinum Resistance Curve...........................A-2

Lake Shore Model 231 User’s Manual

Introduction 1-

CHAPTER 1

INTRODUCTION

1.0 GENERAL

Lake Shore Cryotronics designed and manufactures the Model 231 in the

United States of America. In general, reference to the Model 231 means

both the Model 231 and 231P. Specific references are made where

appropriate. This chapter provides a general description with specifications

in Paragraph 1.1, single-enclosure case description in Paragraph 1.2, and

multiple-unit enclosure case description in Paragraph 1.3.

We welcome comments on this manual. Although we try to keep it error-free,

some may occur. To report an error, describe it briefly and include the

appropriate paragraph, figure, table, and page number. Send comments to

Lake Shore Cryotronics, Attn: Technical Publications, 575 McCorkle Blvd.,

Westerville, Ohio 43082-8888. This manual is subject to change without

notice.

1.1 MODEL 231 GENERAL DESCRIPTION

The Model 231 Temperature Transmitter is available as a stand-alone unit or

for use within either of two enclosures: a Model 2308-1 single-space

enclosure, or a Model 2308-12 rackmount case that holds up to 12 units.

The Model 231 Temperature Transmitter sends temperature data from its

position near a sensor to a data acquisition channel or strip chart recorder. It

operates with Silicon diode or Gallium-Aluminum-Arsenide (GaAlAs) diode

sensors. Lake Shore Silicon diode sensors are accurate over a wide

cryogenic temperature range and are interchangeable for some applications.

The Lake Shore Series TG-120 GaAlAs diodes operate in a low to moderate

magnetic field. Excited with a 10 µA current source from the Model 231, the

sensors produce a voltage that depends on temperature. A microcontroller

reads the voltage through an A/D converter and translates it into

temperature. Either the standard temperature curve or an optional

CalCurve™ relates voltage to temperature (the Series TG-120 requires a

CalCurve).

The Model 231P uses a Series PT-100 Platinum Thermometer. The Model

231P excites the sensor with a 500 µA current to produce a measurable

signal. Either the standard platinum curve (DIN 437600) or a CalCurve is

used for temperature conversion.

Lake Shore Model 231 User’s Manual

Introduction

Once the Model 231 obtains temperature data, it

transmits it as a current from 4 to 20 mA. The

current output changes linearly with sensor

temperature. Output scale depends on the selected

temperature range. Several switch selected ranges

are available. For highest accuracy and sensitivity,

set the output for a narrow temperature band. An

optional 0 to 20 mA output is also available to

convert output to a voltage reading scaled from zero.

A 500 ±0.02% precision resistor is provided for

this purpose. This resistor produces the maximum

full-scale output of 10 V.

A single +5 VDC supply powers Model 231 circuitry.

The outputs are isolated so several 231s can

operate from the same supply without interference.

The +5 VDC can also be supplied from the pins on

the VME bus connector.

Mechanical mounting is easy because the

Model 231 is built on a standard size VME card.

It fits directly into a single height (3U) VME card

holder. The transmitter does not use the electrical

bus format, only its physical shape and power

supply.

Figure 1-1. Typical

Model 231 Front Panel

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