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Lakeshore 335 - User Manual

Lakeshore 335
172 pages
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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. 1.2 P/N 119-055 04 October 2012
User’s Manual
Model 335
Temperature Controller
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
sales@lakeshore.com
service@lakeshore.com
www.lakeshore.com
Fax: (614) 891-1392
Telephone: (614) 891-2243

Table of Contents

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Summary

Chapter 1: Introduction

1.1 Product Description

Overview of the Model 335's features, including sensor inputs, PID control, interfaces, and advanced functions.

1.1.1 Sensor Inputs

Details on the two standard sensor inputs, compatibility with diode/RTD sensors, and optional thermocouple input.

1.1.2 Temperature Control

Explanation of the Model 335's temperature control capabilities, including PID loops, autotuning, and setpoint ramping.

1.1.3 Interface

Information on the standard USB and IEEE-488 interfaces for computer control and data acquisition.

1.1.4 Configurable Display

Details on the Model 335's customizable front panel display modes for monitoring readings and control information.

1.1.5 Model 3060 Thermocouple Input Option

Information on the field-installable option for adding thermocouple measurement capabilities to the Model 335.

1.2 Sensor Selection

1.2 Sensor Selection

Guidance on choosing appropriate temperature sensors, considering range, sensitivity, and magnetic field effects.

1.3 Model 335 Specifications

1.3.1 Input Specifications

Detailed technical specifications for various sensor inputs, including range, excitation, and accuracy.

1.3.2 Sensor Input Configuration

Configuration options for sensor inputs, including number of inputs, isolation, resolution, and user curves.

1.3.3 Thermometry

Overview of thermometry capabilities, including sensor types, calibration, and math functions.

1.3.4 Control

Technical specifications for control outputs, including modes, tuning, and parameters.

1.3.5 Front Panel

Specifications related to the front panel display, units, resolution, and features.

1.3.6 Interface

Specifications for the IEEE-488 and USB interfaces, including capabilities and reading rates.

1.3.7 General

General specifications including ambient temperature, power requirements, size, and weight.

1.4 Safety Summary and Symbols

1.4 Safety Summary and Symbols

General safety precautions, environmental conditions, and safety symbols to be observed during operation.

Chapter 2: Cooling System Design and Temperature Control

2.1 General

Introduction to designing a temperature control system and obtaining optimal measurement and control.

2.2 Temperature Sensor Selection

Guidance on selecting temperature sensors, considering range, sensitivity, and environmental factors.

2.3 Sensor Calibrations

Information on sensor calibration services, including precision calibration, SoftCal™, and standard curves.

2.4 Sensor Installation

Key elements of proper sensor installation, including mounting materials, location, and thermal considerations.

2.5 Heater Selection and Installation

Guidance on selecting and installing resistive heaters, considering resistance, power, and thermal anchoring.

2.6 Consideration for Good Control

Factors affecting good temperature control, including thermal conductivity, lag, mass, and non-linearity.

2.7 PID Control

Explanation of the Proportional-Integral-Derivative (PID) control algorithm used by the Model 335.

2.8 Manual Tuning

Basic rules and procedures for manually tuning PID control loops for optimal performance.

2.9 Autotuning

Description of the Autotune feature for automating PID control parameter calculation.

2.10 Zone Tuning

Explanation of the Zone feature for establishing custom temperature zones with specific control parameters.

2.11 Thermoelectric Devices

Information on using thermoelectric devices for temperature control and bipolar control mode.

Chapter 3: Installation

3.1 General

General installation instructions for the Model 335, emphasizing safety and performance.

3.2 Inspection and Unpacking

Procedures for inspecting shipping containers and unpacking the instrument and its accessories.

3.3 Rear Panel Definition

Description of the Model 335 rear panel connections, including inputs, outputs, and interfaces.

3.4 Line Input Assembly

Instructions for connecting the Model 335 to AC line power, including voltage selection and fuse details.

3.5 Diode;Resistor Sensor Inputs

Details on connecting diode and resistor sensors, including connector pinouts and measurement techniques.

3.6 Thermocouple Sensor Inputs (Thermocouple Model 3060)

Instructions for installing and connecting thermocouple sensors using the Model 3060 option.

3.7 Heater Output Setup

Guidance on wiring and configuring heater outputs, including descriptions, connectors, and noise reduction.

Chapter 4: Operation

4.1 General

Introduction to the general operating features and advanced operation of the Model 335.

4.2 Front Panel Description

Detailed description of the front panel controls, indicators, and keypad layout.

4.3 Display Setup

Information on configuring the front panel display modes for optimal viewing of readings and parameters.

4.4 Input Setup

Configuration of sensor inputs, including type, range, excitation, calibration, and units.

4.5 Output and Control Setup

Configuration of outputs and control loops, including heater outputs, modes, and control parameters.

4.6 Interface

Configuration and operation of the computer interfaces (USB and IEEE-488).

4.7 Locking and Unlocking the Keypad

Procedure for locking and unlocking the front panel keypad to prevent accidental changes.

Chapter 5: Advanced Operation

5.1 General

Introduction to advanced operating features of the Model 335 temperature controller.

5.2 Autotune

Description of the Autotune feature for automating PID control parameter tuning for cryogenic systems.

5.3 Zone Settings

Procedure for establishing up to ten custom temperature zones with pre-programmed control parameters.

5.4 Bipolar Control

Information on using bipolar control mode for devices like thermoelectric coolers with Output 2.

5.5 Warm Up Supply

Configuration and operation of Warm Up Supply mode for rapid temperature increases.

5.6 Monitor Out

Configuration of Monitor Out mode for outputting voltage proportional to sensor input.

5.7 Alarms and Relays

Configuration and operation of alarms and relays for monitoring and controlling system states.

5.8 Curve Numbers and Storage

Details on standard and user curve locations, and parameters for curve identification.

5.9 Front Panel Curve Entry Operations

Operations for entering, editing, erasing, and copying temperature curves via the front panel.

5.10 SoftCal

Information on using SoftCal™ algorithms for inexpensive sensor calibrations.

5.11 Emulation Modes

Configuration of emulation modes to allow the Model 335 to replace Model 331 or 332 controllers.

Chapter 6: Computer Interface Operation

6.1 General

Introduction to the computer interface, covering IEEE-488 and USB connections.

6.2 IEEE-488 Interface

Details on the IEEE-488 interface, its capabilities, and connection standards.

6.3 USB Interface

Information on the USB interface, including installation of drivers and hardware support.

6.4 Command Summary

Listing and description of interface commands for controlling the Model 335 remotely.

Chapter 7: Options and Accessories

7.1 General

Overview of available models, options, and accessories for the Model 335.

7.2 Models

List of Model 335 model numbers and their corresponding power configurations.

7.3 Options

Details on available options for the Model 335, such as the thermocouple input option.

7.4 Accessories

List of accessories available for the Model 335, including cables, connectors, and conditioners.

7.5 Rack Mounting

Instructions for installing the Model 335 into a rack mount cabinet using the RM-½ rack mount kit.

7.6 Model 3060-H Thermocouple Input Option

Information on the field-installable thermocouple input option for adding thermocouple functionality.

7.7 Model 3003 Heater and Output Conditioner

Description of the Model 3003 conditioner for reducing heater output noise.

Chapter 8: Service

8.1 General

Basic service information and customer service limitations for the Model 335.

8.2 USB Troubleshooting

Troubleshooting steps for issues with USB interface installations and intermittent lockups.

8.3 IEEE Interface Troubleshooting

Troubleshooting steps for issues with IEEE-488 interface installations and intermittent lockups.

8.4 Fuse Drawer

Description of the fuse drawer, which holds line fuses and the line voltage selection module.

8.5 Line Voltage Selection

Procedure for changing the instrument's line voltage selector, with safety warnings.

8.6 Fuse Replacement

Procedure for replacing line fuses, emphasizing safety and correct fuse type/rating.

8.7 Factory Reset Menu

Using the Factory Reset menu to restore default parameter values and clear user curves.

8.8 Error Messages

List of common error messages displayed by the Model 335 during operation.

8.9 Calibration Procedure

Information on obtaining instrument calibration through Lake Shore Service.

8.10 Rear Panel Connector Definition

Definition of rear panel connectors, including sensor input, heater output, and interface ports.

8.11 Electrostatic Discharge

Information on Electrostatic Discharge (ESD) and handling sensitive components.

8.12 Model 3060 Installation

Procedure for field-installing the Model 3060 thermocouple input option.

8.13 Firmware Updates

Instructions for downloading and installing instrument firmware updates from the Lake Shore website.

8.14 Technical Inquiries

Contact information and procedures for technical assistance, product service, and returns.

Appendix A: Temperature Scales

A.1 Definition

Definition of temperature and the Celsius, Fahrenheit, and Kelvin scales.

A.2 Comparison

Graphical comparison of the three temperature scales.

A.3 Conversions

Formulas for converting between Fahrenheit, Celsius, and Kelvin temperature scales.

Appendix B: Handling Liquid Helium and Nitrogen

B.1 General

Introduction to handling liquid helium and nitrogen with safety considerations.

B.2 Properties

Comparison of the properties of liquid helium and liquid nitrogen.

B.3 Handling Cryogenic Storage Dewars

Instructions for operating cryogenic storage Dewars safely.

B.4 Liquid Helium and Nitrogen Safety Precautions

Essential safety aspects for handling liquid helium and nitrogen, including ventilation and protection.

B.5 Recommended First Aid

Summary of first aid procedures for overexposure to cryogenic liquids or cold gases.

Appendix C: Curve Tables

C.1 General

List of standard curve tables included with the Model 335 temperature controller.

Lakeshore 335 Specifications

General IconGeneral
Control Channels2
Sensor Inputs2
Resolution0.001 K
Output Channels2
Control AlgorithmPID
Input TypeThermocouple, Diode
Communication InterfacesRS-232
Heater Output Power25 W or 50 W per channel
Power Requirements100-240 VAC, 50/60 Hz

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