Lakeshore 340 - User Manual

Rev. 2.1 P/N 119-011 29 March 2004
Input
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5
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6
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2
Analog
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3
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0
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.
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+/-
Enter
Auto
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P I D
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340 Temperature Controller
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
Internet 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.
User’s Manual
Model 340
Temperature Controller

Summary

CHAPTER 1 INTRODUCTION

1.2 TEMPERATURE CONTROL SYSTEM WITH THE MODEL 340

1.3 MODEL 340 FEATURES

Overviews individual features of the instrument in the temperature control environment.

CHAPTER 2 COOLING SYSTEM DESIGN

2.1 TEMPERATURE SENSOR SELECTION

Guides user on selecting the proper temperature sensor considering range and sensitivity.

2.2 CALIBRATED SENSORS

2.3 SENSOR INSTALLATION

Highlights proper sensor installation elements like mounting, location, and thermal conductivity.

2.4 HEATER SELECTION AND INSTALLATION

Covers heater selection, resistance, power, and installation procedures.

2.5 CONSIDERATIONS FOR GOOD CONTROL

2.6 PID CONTROL

Explains PID control algorithm terms (Proportional, Integral, Derivative) and their functions.

2.7 MANUAL TUNING

Provides basic rules for tuning PID control parameters like P, I, and D.

2.8 AUTOTUNING

Describes the AutoTune feature for automatically choosing control settings.

2.9 ZONE TUNING

CHAPTER 3 INSTALLATION

3.2 REAR PANEL DEFINITION

3.3 LINE INPUT ASSEMBLY

3.4 STANDARD SENSOR INPUTS

Details how to connect sensors to the standard Model 340 inputs.

3.5 HEATER OUTPUT SETUP

Covers wiring, protection, and noise considerations for heater outputs.

3.6 ANALOG OUTPUTS

3.7 DIGITAL I;O

3.8 RELAYS

CHAPTER 4 FRONT PANEL OPERATION

4.2 DISPLAY FORMATS

4.3 KEYPAD DESCRIPTION

4.4 KEYPAD NAVIGATION

Guides on navigating menus and setting parameters using the keypad.

4.5 CHANGING DISPLAY FORMAT

CHAPTER 5 SENSOR INPUT AND TEMPERATURE MEASUREMENT OPERATION

5.1 SENSOR INPUT SETUP

Covers sensor type, voltage excitation, and special sensor configurations.

5.2 SELECTING A TEMPERATURE RESPONSE CURVE

Guides on selecting a temperature response curve to convert sensor readings to temperature.

5.3 FILTER AND MATH

5.4 SCANNER SUPPORT

CHAPTER 6 TEMPERATURE CONTROL OPERATION

6.1 CONTROL LOOP DISPLAYS

6.2 CONTROL LOOP ENABLE

Explains how to enable or disable control outputs for Loop 1 and Loop 2.

6.3 CONTROL LOOP FILTER

6.4 CONTROL CHANNEL

Guides on selecting the sensor input to use as feedback for each control loop.

6.5 CONTROL MODES

Describes manual PID, AutoTune, Zone, and Open Loop control modes.

6.6 MANUAL SETTING OF PID CONTROL PARAMETERS

Defines and guides on setting PID control parameters (P, I, D, Manual Output).

6.7 SELECTING AN AUTOTUNE CONTROL MODE

Guides on setting up the cooling system and selecting an AutoTune control mode.

6.8 ZONE CONTROL DATA ENTRY

Guides on establishing custom temperature zones with pre-programmed PID settings.

6.9 USING OPEN LOOP CONTROL

Explains using open loop control for experiments requiring constant output regardless of temperature.

6.10 SETTING A SETPOINT AND SETPOINT UNITS

Guides on setting the control setpoint and selecting units (Kelvin, Celsius, or sensor).

6.11 SETPOINT RAMPING

6.12 CONTROL OUTPUT

Discusses using heater output and analog output as control outputs.

6.13 CONTROL OUTPUT LIMITS

CHAPTER 7 ANALOG OUTPUT, DIGITAL I;O, ALARM, AND RELAY OPERATION

7.1 ANALOG OUTPUTS

7.2 DIGITAL INPUTS AND OUTPUTS (I;O)

7.3 INPUT ALARMS

Guides on enabling and configuring input alarms, including sources and relay actions.

7.4 HIGH AND LOW RELAYS

CHAPTER 8 INSTRUMENT PROGRAMMING

8.1 CURVE ENTRY FROM THE FRONT PANEL

Guides on entering temperature response curves via the front panel.

8.2 SOFTCAL

Describes SoftCal for improving sensor accuracy and creating calibration curves.

8.3 INTERNAL PROGRAMMING

Explains creating and running internal programs for automated sequences.

8.4 DATA CARD OPERATION

CHAPTER 9 REMOTE OPERATION

9.1 IEEE-488 INTERFACE

Describes the IEEE-488 interface and its capabilities for instrument communication.

9.2 SERIAL INTERFACE OVERVIEW

9.3 IEEE-488;SERIAL INTERFACE COMMANDS

Lists and explains commands for controlling the instrument remotely via IEEE-488 or Serial.

Lakeshore 340 Specifications

General

Control Channels	2
Sensor Inputs	2
Control Type	PID
Control Outputs	2
Heater Power	50 W per channel
Display Resolution	0.001 K
Input Type	Thermocouples, RTDs
Interface	IEEE-488, RS-232
Power Requirements	100-120/220-240 VAC, 50/60 Hz
Control Stability	±0.01 K