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Lakeshore 332 User Manual

Temperature controller
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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.
Revision: 1.7
Temperature Controller
LakeShore
Control
Zone
Input
Display
Setup
Setting
Setup
Format
1
2
3
4
PID/
Curve
Setpoint
Math
MHP
Entry
6
7
8
9
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
E-mail Addresses:
sales@lakeshore.com
service@lakeshore.com
Visit Our Website At:
www.lakeshore.com
Fax: (614) 891-1392
Telephone: (614) 891-2243
P/N 119-034
User's Manual
Model 332
332 Temperature Controller
Remote/
Alarm
Escape
Local
5
+/–
Analog
Interface
Enter
Output
0
Control A
Tune
Remote
Control B
Ramp
Alarm
Auto
Heater
Tune
Range
Heater
Loop
Off
14 May 2009

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Summary of Contents for Lakeshore 332

  • Page 1 User’s Manual Model 332 Temperature Controller LakeShore 332 Temperature Controller Control A Tune Remote Control B Ramp Alarm Control Zone Input Display Remote/ Auto Heater Alarm Escape Setup Setting Setup Format Local Tune Range +/– PID/ Curve Analog Heater Setpoint...
  • Page 2 2. Lake Shore warrants the Product only if it has been sold by an FIRMWARE LIMITATIONS authorized Lake Shore employee, sales representative, dealer Lake Shore has worked to ensure that the Model 332 firmware is or original equipment manufacturer (OEM). as free of errors as possible, and that the results you obtain from 3.

  • Page 3: Declaration Of Conformity

    Lake Shore Model 332 Temperature Controller User’s Manual DECLARATION OF CONFORMITY Lake Shore Cryotronics, Inc. 575 McCorkle Blvd. Westerville OH 43082-8888 USA hereby declare that the equipment specified conforms to the following Directives and Standards: Application of Council Directives: ......73/23/EEC 89/336/EEC Standards to which Conformity is declared: ....
  • Page 4 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 Model 332 meets or exceeds the requirements of the European EMC Directive 89/336/EEC as a CLASS A product. A Class A product is allowed to...

  • Page 5: Table Of Contents

    Lake Shore Model 332 Temperature Controller User’s Manual TABLE OF CONTENTS Chapter/Paragraph Title Page INTRODUCTION ..............................1-1 GENERAL ............................1-1 PRODUCT DESCRIPTION ....................... 1-2 SENSOR SELECTION GUIDE ......................1-4 SPECIFICATIONS ..........................1-8 SAFETY SUMMARY ........................1-11 SAFETY SYMBOLS ........................1-12 COOLING SYSTEM DESIGN ..........................
  • Page 6 Lake Shore Model 332 Temperature Controller User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page INSTALLATION ..............................3-1 GENERAL ............................3-1 INSPECTION AND UNPACKING ...................... 3-1 REPACKAGING FOR SHIPMENT ....................3-1 REAR PANEL DEFINITION ....................... 3-2 LINE INPUT ASSEMBLY ........................3-3 3.4.1...
  • Page 7 Lake Shore Model 332 Temperature Controller User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 4.5.1 Diode Sensor Curve Selection ..................... 4-13 4.5.2 Resistor Sensor Curve Selection ....................4-13 4.5.3 Thermocouple Sensor Curve Selection ..................4-13 TEMPERATURE CONTROL ......................4-14 4.6.1...
  • Page 8 Lake Shore Model 332 Temperature Controller User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 6.1.2 IEEE-488 Command Structure ....................... 6-2 6.1.2.1 Bus Control Commands ......................6-2 6.1.2.2 Common Commands ........................6-3 6.1.2.3 Device Specific Commands ......................6-3 6.1.2.4 Message Strings ......................... 6-3 6.1.3...
  • Page 9 Lake Shore Model 332 Temperature Controller User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 8.10.2.2 10 µA Current Source Calibration and 1 µA, 100 µA, 1 mA Output Verfication ......8-12 8.10.2.3 Diode Input Ranges Calibration ....................8-13 8.10.2.4 Resistive Input Ranges Calibration ..................
  • Page 10 Lake Shore Model 332 Temperature Controller User’s Manual LIST OF TABLES Table No. Title Page Temperature Range of Typical Lake Shore Sensors ..................1-4 Model 332 Sensor Input Performance Chart ....................1-5 Model 332 Input Specifications ........................1-8 Sensor Input Types ............................4-7 Sensor Curves ............................

  • Page 11: Introduction

    This chapter introduces the Model 332 Temperature Controller. The Model 332 was designed and manufactured in the United States of America by Lake Shore Cryotronics, Inc. The Model 332 Temperature Controller is a microprocessor-based instrument with digital control of a variable current output.

  • Page 12: Product Description

    (NTC) resistance temperature detectors (RTDs) to temperatures as low as 1 K. The Model 332 includes a 50 W heater output on the first control loop and 10 W on the second control loop. This provides greater flexibility in applications that require a second heater.
  • Page 13 The Model 332 has a second control loop called Loop 2. The Loop 2 output is a single-range, variable DC voltage source that can vary from 0 V to +10 V. The output can source up to 1 A of current providing a maximum of 10 W of heater power.

  • Page 14: Sensor Selection Guide

    Lake Shore Temperature Sensor for your application. A list of sensors that may be used with the Model 332 is provided in Table 1-1. This paragraph provides a brief guideline covering sensors commonly used with the Model 332. Typical performance specifications can be found in Table 1-2.
  • Page 15 50 mK, with accuracy to within ±5 mK at 50 mK; the RX-202A also offers an upper temperature range to 300 K. The Model 332 configured with Rox RTDs should only be used down to 1 K. Thermocouples offer uniform sensitivity over a wide temperature range and measure the highest temperatures possible with the Model 332.
  • Page 16 Lake Shore Model 332 Temperature Controller User’s Manual Table 1-2. Model 332 Typical Sensor Performance Chart (Continued) Germanium Germanium Cernox™ Cernox™ Cernox™ Sensor Type GR-200A-1500 GR-200A-250 CX-1050 CX-1030 CX-1070 Temperature Coefficient Negative Negative Negative Negative Negative Input Range AutoRange AutoRange...
  • Page 17 Lake Shore Model 332 Temperature Controller User’s Manual Table 1-2. Model 332 Typical Sensor Performance Chart (Continued) Thermocouple Thermocouple Sensor Type 25 mV 50 mV Temperature Coefficient Positive Positive Input Range ±25 mV ±50 mV Not Applicable Not Applicable Sensor Excitation...

  • Page 18: Specifications

    Lake Shore Model 332 Temperature Controller User’s Manual SPECIFICATIONS Table 1-3. Model 332 Input Specifications Input Electronic Temperature Display Input Type Excitation Resolution Range Accuracy Coefficient Resolution 0.3 mΩ +0.000% ±0.001Ω ±0.04% 0.2 mΩ/°C +15 PPM 0 – 75 Ω...
  • Page 19 Lake Shore Model 332 Temperature Controller User’s Manual Specifications (Continued) Control Control Loops: Control Type: Closed Loop Digital PID with Manual Heater Power Output, or Open Loop Tuning: AutoTune (one loop at a time), Manual PID, Zones Control Stability: Sensor dependent, refer to performance chart...
  • Page 20 Lake Shore Model 332 Temperature Controller User’s Manual Specifications (Continued) Interface IEEE-488.2 Interface Features: SH1,AH1,T5,L4,SR1,RL1,PP0,DC1,DT0,C0,E1 Reading Rate: To 10 readings per second on each input Software Support: LabView Driver Serial Interface Electrical Format: RS-232C Max. Baud Rate: 9600 Baud Connector:...

  • Page 21: Safety Summary

    Rack mount kit for two ½ rack temperature controllers in a 483 mm (19 inch) rack, 135 mm (5.3 inches) high Refer to Chapter 7 of this manual for a complete description of Model 332 options and accessories. Specifications are subject to change without notice.

  • Page 22: Safety Symbols

    Lake Shore Model 332 Temperature Controller User’s Manual Safety Summary (Continued) 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. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

  • Page 23: Cooling System Design

    Another thing to consider when choosing a temperature sensor is that instruments like the Model 332 are not able to read some sensors over their entire temperature range. Lake Shore sells calibrated sensors that operate down to 50 millikelvin (mK), but the Model 332 is limited to above 1 K in its standard configuration.

  • Page 24: Environmental Conditions

    This type of calibration provides the most accurate temperature sensors available from Lake Shore. Errors from sensor calibration are usually smaller than the error contributed by the Model 332. The Lake Shore Temperature Measurement and Control Catalog has complete accuracy specifications for calibrated sensors.

  • Page 25: Softcal

    The smaller table, called a breakpoint interpolation table, is sized to fit into instruments like the Model 332 where it is called a temperature response curve. Getting a curve into a Model 332 may require a CalCurve™ described below or hand entering through the instrument front panel.

  • Page 26: Silicon Diode Sensor Calibrations And Calcurve

    Lake Shore Model 332 Temperature Controller User’s Manual Lake Shore Silicon Diode Regarding accuracy, there are 3 things that can be done with Temperature Sensor a temperature sensor: Precision SoftCal™ Standard Calibration Calibration Standard sensors are interchange- A Lake Shore SoftCal applies only to...

  • Page 27: Sensor Installation

    Lake Shore Model 332 Temperature Controller User’s Manual SENSOR INSTALLATION This section highlights some of the important elements of proper sensor installation. Lake Shore sensors are shipped with installation instructions that cover that specific sensor type and package. The Lake Shore Temperature Measurement and Control Catalog includes an installation section as well.

  • Page 28: Contact Pressure

    Lake Shore Model 332 Temperature Controller User’s Manual 2.3.5 Contact Pressure When sensors are permanently mounted, the solder or epoxy used to hold the sensor act as both gasket and adhesive. Permanent mounting is not a good solution for everyone because it limits flexibility and can potentially damage sensors.

  • Page 29: Lead Soldering

    Cryogenic cooling systems have a wide range of cooling power. The resistive heater must be able to provide sufficient heating power to warm the system. The Model 332 can supply up to 50 W of power to a heater (if the heater resistance is appropriate). The Model 332 heater output current source has a...

  • Page 30: Heater Location

    Lake Shore Model 332 Temperature Controller User’s Manual 2.4.2 Heater Location For best temperature measurement accuracy the heater should be located so that heat flow between the cooling power and heater is minimized. For best control the heater should be in close thermal contact with the cooling power.

  • Page 31: Two-Sensor Approach

    PID CONTROL For closed-loop operation, the Model 332 temperature controller uses a algorithm called PID control. The control equation for the PID algorithm has three variable terms: proportional (P), integral (I), and derivative (D).

  • Page 32: Proportional (P)

    Manual Heater Power (MHP) Output The Model 332 has a control setting that is not a normal part of a PID control loop. Manual Heater Power (MHP) output can be used for open-loop control, meaning feedback is ignored and the heater output stays at the users manual setting.

  • Page 33: Examples Of Pid Control

    Lake Shore Model 332 Temperature Controller User’s Manual P-331-2-3.bmp Figure 2-3. Examples of PID Control Cooling System Design 2-11...

  • Page 34: Manual Tuning

    Begin this part of the tuning process by letting the cooling system cool and stabilize with the heater off. Place the Model 332 in closed-loop control mode with manual PID tuning, then turn integral, derivative and manual output settings off. Enter a setpoint several degrees above the cooling systems lowest temperature.

  • Page 35: Tuning Integral

    2.7.3 Tuning Integral When the proportional setting is chosen and the integral is set to zero (off), the Model 332 controls the load temperature below the setpoint. Setting the integral allows the Model 332 control algorithm to gradually eliminate the difference in temperature by integrating the error over time. See Figure 2-3(d).

  • Page 36: Zone Tuning

    AutoTune feature. Once the load temperature is at or near the new setpoint, the Model 332 looks at the logged data to calculate the best P, I, and D settings values. Those values are then loaded and used as the control parameters so the control loop can stabilize at the new setpoint.

  • Page 37: Installation

    REPACKAGING FOR SHIPMENT If it is necessary to return the Model 332, sensor(s), or accessories for recalibration, repair, or replacement, a Return Goods Authorization (RGA) number must be obtained from a factory representative before returning the instrument to our service department. When returning an instrument for service, the following information must be provided before Lake Shore can attempt any repair.

  • Page 38: Rear Panel Definition

    Lake Shore Model 332 Temperature Controller User’s Manual REAR PANEL DEFINITION This paragraph provides a description of the Model 332 rear panel connections. The rear panel consists of the line input assembly, RS-232 Connector, HEATER OUTPUT Connector, INPUT A and B Sensor Input Connectors, the RELAY and ANALOG OUTPUT Terminal Block, and the IEEE-488 INTERFACE Connector.

  • Page 39: Line Input Assembly

    Line Fuse and Fuse Holder The line fuse is an important safety feature of the Model 332. If a fuse ever fails, it is important to replace it with the value and type indicated on the rear panel for the line voltage setting. The letter T on the fuse rating indicates that the instrument requires a time-delay or slow-blow fuse.

  • Page 40: Power Switch

    Power Switch The power switch is part of the line input assembly on the rear panel of the Model 332 and turns line power to the instrument On and Off. When the circle is depressed, power is Off. When the line is depressed, power is On.

  • Page 41: Grounding And Shielding Sensor Leads

    Shielding the sensor lead cable is important to keep external noise from entering the measurement. A shield is most effective when it is near the measurement potential so the Model 332 offers a shield that stays close to the measurement. The shield of the sensor cable should be connected to the shield pin of the input connector.

  • Page 42: Two-Lead Sensor Measurement

    Lake Shore Model 332 Temperature Controller User’s Manual 3.5.6 Two-Lead Sensor Measurement There are times when crowding in a cryogenic system forces users to read sensors in a two lead configuration because there are not enough feedthroughs or room for lead wires. If this is the case, plus voltage to plus current and minus voltage to minus current leads are attached at the back of the instrument or at the vacuum feedthrough.

  • Page 43: Thermocouple Sensor Inputs

    Lake Shore Model 332 Temperature Controller User’s Manual THERMOCOUPLE SENSOR INPUTS (Model 332-TX Only) The information in this paragraph is for a Model 332 configured at the factory with one or two thermocouple sensor inputs; being Model 332-T1 or T2. Sensor connection is important when using thermocouples because the measured signal is small.

  • Page 44: Heater Output Setup

    Loop 1 Output Of the two Model 332 control loops, Loop 1 is considered the primary loop because it is capable of driving 50 W of heater power. The heater output for Loop 1 is a traditional control output for a cryogenic temperature controller.

  • Page 45: Loop 1 Heater Output Noise

    Loop 1 Heater Output Noise The heater output circuitry in the Model 332 must be capable of sourcing 50 W of power. This type of circuitry can generate some electrical noise. The Model 332 was designed to generate as little noise as possible but even noise that is a small percentage of the output voltage or current can be too much when sensitive measurements are being made near by.

  • Page 46: Analog Output

    When Control Loop 2 is not being used, its output can be configured as an analog voltage output. When properly configured the Model 332 has a single analog output on Pins 7 and 8 of the terminal block at the rear of the instrument. It is normally used to send a voltage proportional to temperature to a strip chart recorder or separate data acquisition system.

  • Page 47: 3.10 Initial Setup And System Checkout Procedure

    Relay connections are available in positions 1 thru 6 of the detachable RELAY and ANALOG OUTPUT Terminal Block. See Figure 3-5. The terminal block (P/N 106-737) is included with the Model 332. For convenient installation of wires, the terminal block may be removed from the socket. According to the manufacturer, up to 12 AWG stranded copper wire may be used with the terminal block, though it is unlikely that wire that large is required to carry the rated 5 amp current of the relay.
  • Page 48 NOTE: If any problems appear, immediately press the Heater Off key. If any error messages are displayed, refer to Paragraph 8.9 for details. The Model 332 should now be controlling the temperature in the experimental setup at the setpoint temperature. Once this initial checkout procedure is successfully completed, the unit is ready for normal operation.

  • Page 49: Operation

    Instrument default settings are provided in Paragraph 4.21. Advanced operation is described in Chapter 5. Computer interface operation is detailed in Chapter 6. FRONT PANEL DESCRIPTION This paragraph provides a description of the front panel controls and indicators for the Model 332. 4.1.1 Keypad Definitions An abbreviated description of each key is provided as follows.
  • Page 50 Lake Shore Model 332 Temperature Controller User’s Manual Keypad Definitions (Continued) Allows selection of control input, setpoint units, closed or open-loop control mode, Control Setup power up enable, display of heater output units, setpoint ramp enable, and ramp rate for the currently selected loop. Refer to Paragraph 4.7 for control setup and Paragraph 4.12 for ramp feature.

  • Page 51: Annunciators

    Lake Shore Model 332 Temperature Controller User’s Manual 4.1.2 Annunciators LED Annunciators Six blue LED annunciators are included to provide visual feedback of the following operation. On when Input A is being used as the control input for the loop being displayed. Refer Control A to Paragraph 4.4.

  • Page 52: Display Definition

    4.1.5 Heater Bar Definition The Model 332 includes the Heater Bar feature in Display Location 4. The bar gives a visual rather than numeric representation of the heater output. Each block indicates 2% of heater output with a large index block every 10%. The height of the smaller blocks reflect the heater range. See Figure 4-3.

  • Page 53: Turning Power On

    Lake Shore Model 332 Temperature Controller User’s Manual TURNING POWER ON After verifying line voltage (Paragraph 3.4), plug the instrument end of the line cord (included with the connector kit) into the power and fuse assembly receptacle on the instrument rear. Plug the opposite end of the line cord into a properly grounded, three-prong receptacle.
  • Page 54 Lake Shore Model 332 Temperature Controller User’s Manual Display Format (Continued) Use the s or t key to cycle between Input A, Input B, or None. For this example, select Input A then press the Enter key. You will see the following display Select for Disp 1 °®...

  • Page 55: Input Setup

    Lake Shore Model 332 Temperature Controller User’s Manual INPUT SETUP The Model 332 supports a variety of temperature sensors sold by Lake Shore and other manufacturers. An appropriate sensor type must be selected for each of the two inputs. If the exact sensor model is not shown, use the sensor input performance chart in Table 4-1 to choose an input type with similar range and excitation.

  • Page 56: Platinum Resistor Sensor Input Setup

    Lake Shore Model 332 Temperature Controller User’s Manual Diode Sensor Input Setup (Continued) Use the s or t key to cycle through the sensor types shown in Table 4-1, until “Diode” is displayed. Press the Enter key. Select for InputA °®...

  • Page 57: Thermal Emf Compensation

    Platinum and NTC RTD sensors have the additional choice of turning current reversal On or Off, with the default value being Off. If turned On, the Model 332 will automatically reverse the polarity. Press the Enter key. Proceed to Paragraph 4.5.2 to select a temperature curve or press the Escape key to return to the normal display.

  • Page 58: Thermocouple Sensor Input Setup

    The following thermocouple screens are only displayed when the Model 332 hardware is configured at the factory with one or two thermocouple sensor inputs; being Model 332 – T1 or T2. The user has the choice of two different input voltage ranges: ±25 mV and ±50 mV. The ±25 mV range is recommended for cryogenic applications or higher temperatures less than 500 K.

  • Page 59: Room-Temperature Calibration Procedure

    For less demanding applications, a short across the input terminals will suffice. If the Model 332 is configured as dual thermocouple unit, calibrate both inputs even if they use the same type of thermocouple. An appropriate curve must be selected and room temperature compensation must be turned on before calibration can be started.

  • Page 60: Curve Selection

    After the appropriate sensor type is selected for each of the two inputs (Paragraph 4.4), an appropriate curve may be selected for each input. The 332 can use curves from several sources. Standard curves are included with every instrument and numbered 1 – 20. User curves, numbered 21 – 41, are loaded when a sensor does not match a standard curve.

  • Page 61: Diode Sensor Curve Selection

    The following thermocouple screens are only displayed when the Model 332 hardware is configured at the factory with one or two thermocouple sensor inputs; being Model 332-T1 or -T2. Once the input is setup for the thermocouple input voltage (Paragraph 4.4.3), you may choose a temperature curve.

  • Page 62: Temperature Control

    4.6.1 Control Loops The Model 332 is capable of running two simultaneous control loops. Their capabilities are compared in Table 4-3. The primary difference between the two loops is their control output. Loop 1: Loop 1, the primary control loop, is the traditional control loop for a cryogenic temperature controller.

  • Page 63: Control Modes

    4.6.3 Tuning Modes The Model 332 offers three tuning modes or ways to set the necessary P, I, and D parameters for closed-loop control. MHP Output is active during closed-loop control and must be set to zero if not wanted. Heater range must also be considered as part of tuning when using control Loop 1.
  • Page 64 Use the s or t key to toggle between Power Up Enable or Disable. Press the Enter key. The Model 332 will display the heater output as either percent of full scale current or percent of full scale power for the heater range selected for Loop 1. For Loop 2 the control output is always reported in percent of full scale voltage and this parameter will not appear in the Control Setup menu.

  • Page 65: Manual Tuning

    Lake Shore Model 332 Temperature Controller User’s Manual MANUAL TUNING (Closed-Loop PID Control) In manual PID mode, the controller will accept user-entered Proportional, Integral, and Derivative parameters to provide three-term PID control. Manual heater power output can be set manually in open loop and closed-loop control modes.

  • Page 66: Manually Setting Derivative (D)

    1/4 and 1/8 the integral time in seconds, if used at all. As a convenience to the operator, the Model 332 Derivative time constant is expressed in percent of ¼ the integral time. The range is between 0 and 200%. Start with settings of either 0%, 50%, or 100%, and determine which setting gives you the type of control you desire.

  • Page 67: Autotune (Closed-Loop Pid Control)

    Autotuning mode. When the AutoTune feature is on, the front panel Tune LED will be on steady. When there is a setpoint change and the Model 332 is actively gathering data, the Tune LED will blink.

  • Page 68: Zone Settings (Closed-Loop Control)

    During numeric entry, you can press the Escape key one time to clear the entry, and a second time to exit to the normal display. NOTE : The default setting for all the zone setpoints is zero (0). The Model 332 will not search for additional zones once it encounters a setpoint of zero.
  • Page 69 Lake Shore Model 332 Temperature Controller User’s Manual Zone Settings (Continued) Enter for Zone 01 Integ (I) 20.0 The Integral (I) value is entered using the numeric keypad, which includes the numbers 0 – 9, +/–, and decimal point. Integral has a range of 0.1 to 1000 with a default of 20. Press the Enter key to accept the new setting.

  • Page 70: Record Of Zone Settings

    Lake Shore Model 332 Temperature Controller User’s Manual Zone Setting WorkSheet Zone 10 Setpoint: Proportional Integral Derivative MHP Output Heater Range (0.1-1000) (0.1-1000) (0-200) (0-100%) Off Low Med High Zone 09 Setpoint: Proportional Integral Derivative MHP Output Heater Range (0.1-1000) (0.1-1000)

  • Page 71: Setpoint

    NOTE : If a curve is not assigned to the control input, control reverts to sensor units and the setpoint is set to the most current reading. When changing setpoint units while the control loop is active, the Model 332 converts the control setpoint to the new control units for minimal disruption in control output.

  • Page 72: 4.13 Heater Range And Heater Off

    The user can correct this problem by properly connecting a heater load. It could also indicate a malfunction internal to the Model 332, such as a loose connection or a malfunctioning component, but this is much less likely. Other error messages are summarized in Paragraph 8.9.
  • Page 73 The Model 332 has a second control loop called Loop 2. Loop 2 has a different output than Loop 1. Loop 2 output is a single range, variable DC voltage source that can vary from 0 V to +10 V. The output can source up to 1 A of current providing a maximum of 10 W of heater power.

  • Page 74: 4.14 Math

    Lake Shore Model 332 Temperature Controller User’s Manual 4.14 MATH Three math features are included for convenience and aid in setting up experiments. Max and Min readings can be captured. A linear equation can be applied to input data to correct system errors or improve performance of the analog outputs.

  • Page 75: 4.14.2 Linear

    Lake Shore Model 332 Temperature Controller User’s Manual 4.14.2 Linear The Model 332 will process either of two simple linear equations for each sensor input: MX+B or M(X+B). The result can be displayed or directed to the analog voltage output.

  • Page 76: 4.14.3 Filter

    Lake Shore Model 332 Temperature Controller User’s Manual Linear (Continued) Use the s or t key to toggle between the Linear B Variable: +SP1, –SP1, +SP2, –SP2, Value. Press the Enter key to accept the new setting. You will see the next display.

  • Page 77: 4.15 Alarms And Relays

    4.15 ALARMS AND RELAYS 4.15.1 Alarms Each input of the Model 332 has high and low alarm capability for each input. Input reading data from any source can be compared to the alarm setpoint values. A reading higher than the high setpoint triggers the high alarm for that input.
  • Page 78 Lake Shore Model 332 Temperature Controller User’s Manual Alarms (Continued) Select for Alm A °® Alarm Use the s or t key to toggle between Alarm On or Off. Press the Enter key. Select for Alm A °® Source Temp K...

  • Page 79: 4.15.2 Relays

    Lake Shore Model 332 Temperature Controller User’s Manual 4.15.2 Relays There are two relays on the Model 332 numbered 1 and 2. They are most commonly thought of as alarm relays, but may be manually controlled also. Relay assignments are configurable as shown in Figure 4-7.Two relays can be used with one sensor input for independent high and low operation.

  • Page 80: 4.16 Analog Output

    When Control Loop 2 is not being used, its output can be configured as an analog voltage output. When properly configured the Model 332 has a single analog output on Pins 7 and 8 of the terminal block at the rear of the instrument. It is normally used to send a voltage proportional to temperature to a strip chart recorder or separate data acquisition system.
  • Page 81 Lake Shore Model 332 Temperature Controller User’s Manual Analog Output In Input Mode (Continued) Bipolar mode refers to whether or not negative voltages are used, as shown below. Input Lowest Highest Middle Bipolar Mode: On Bipolar Mode: On –10 V...

  • Page 82: 4.16.2 Analog Output In Manual Mode

    Lake Shore Model 332 Temperature Controller User’s Manual 4.16.2 Analog Output In Manual Mode In Manual mode, the analog output provide a fixed output according to a percentage of full scale entered by the user; -100.00% to +100.00% corresponding to –10 V to +10 V. The setting resolution on the display is 0.001% but the output itself is limited to 0.003%.

  • Page 83: 4.16.3 Analog Output In Loop 2 Mode

    4.16.3 Analog Output In Loop 2 Mode In Loop 2 mode, the analog output is directly controlled by Model 332. To place the analog output in Loop 2 mode, press the Analog Output key, then press the s or t key until you see the following display.

  • Page 84: 4.18 Display Brightness

    4.19 REMOTE/LOCAL “Local” refers to operating the Model 332 from the front panel. “Remote” refers to operating the controller via the IEEE-488 Interface. They keypad is disabled during remote operation. The mode of operation can be changed by pressing the Remote/Local key. When in the Local mode, the Remote LED in the upper right-hand corner of the front panel will be Off.

  • Page 85: Default Values

    Select With °® Emulation Mode Use the s or t key to toggle between 332 and 330. The default setting is 332. If 332 mode is selected, pressing the Enter key will return you to the normal display. To support owners of the Lake Shore Model 330 Temperature Controller, 330 Emulation Mode is provided.

  • Page 86: Default Values

    Use the s or t key to select Yes or No to clear the user curves (in locations 21 – 41) stored in the Model 332. Standard curves (in locations 1 – 20) are unaffected. Press the Enter key. The instrument performs the operation then returns to the normal display.

  • Page 87: Advanced Operation

    The Model 332 has 20 user curve locations numbered 21 thru 41. Each location can hold from 2 to 200 data pairs (breakpoints) including a value in sensor units and a corresponding value in kelvin. Using fewer than 200 breakpoints will not increase the number of available curve locations.

  • Page 88: Curve Breakpoints

    The breakpoints should be entered with the sensor units value increasing as point number increases. There should not be any breakpoint locations left blank in the middle of a curve. The search routine in the Model 332 interprets a blank breakpoint as the end of the curve. FRONT PANEL CURVE ENTRY OPERATIONS There are three operations associated with front panel curve entry: Edit curve, Copy curve, Erase curve;...

  • Page 89: Curve Header Parameters

    Lake Shore Model 332 Temperature Controller User’s Manual Table 5-1. Curve Header Parameters The curve name cannot be changed from the front panel. Curve names can only be entered over the computer interface (up to 15 characters). The default curve Name: name is User xx, where xx is the curve number.

  • Page 90: Edit Curve

    Lake Shore Model 332 Temperature Controller User’s Manual 5.2.1 Edit Curve The Edit Curve operation is used to enter a new curve or edit an existing user curve. Only user curves (21 to 41) can be changed. Standard curves can only be viewed with the edit operation.

  • Page 91: Thermocouple Curve Considerations

    The temperature range for some thermocouple types may extend below 1 K or above 1000 K. • The input voltage of the Model 332 is limited to ±50 mV, so any part of the curve that extends beyond ±50 mV is not usable by the instrument.

  • Page 92: Erase Curve

    5.2.3 Copy Curve Temperature curves can be copied from one location inside the Model 332 to another. This is a good way to make small changes to an existing curve. Curve copy may also be necessary if the user needs the same curve with two different temperature limits or needs to extend the range of a standard curve.

  • Page 93: Softcal

    The SoftCal calibration points are generated in a controlled calibration facility at Lake Shore for best accuracy. The calibration points can be entered into the Model 332 so it can generate a curve. If the CalCurve service is purchased with the calibrated sensor, the curve is also generated at the factory and can be entered like any other curve.

  • Page 94: Softcal Accuracy With Silicon Diode Sensors

    Lake Shore Model 332 Temperature Controller User’s Manual SoftCal Point 1 SoftCal Point 2 SoftCal Point 1 SoftCal Point 1 Room Temperature Liquid Nitrogen Liquid Helium Point Boiling Point Boiling Point 305 K 4.2 K 77.35 K 2 – 10 K 50 –...

  • Page 95: Softcal With Platinum Sensors

    Lake Shore Model 332 Temperature Controller User’s Manual 5.3.3 SoftCal With Platinum Sensors The platinum sensor is a well-accepted temperature standard because of its consistent and repeatable temperature response above 30 K. SoftCal gives platinum sensors better accuracy than their nominal matching to the DIN 43760 curve.

  • Page 96: Softcal Calibration Curve Creation

    Lake Shore Model 332 Temperature Controller User’s Manual 5.3.5 SoftCal Calibration Curve Creation Once the calibration data points have been obtained, you may create a SoftCal calibration. This example illustrates SoftCal of a DT-470 Diode. Press the Curve Entry key. Press the s or t key until you see the following display.
  • Page 97 Lake Shore Model 332 Temperature Controller User’s Manual SoftCal Calibration Curve Creation (Continued) NOTE: If Point 2 is not being used, press the Enter key with both settings at their default value and advance to Point 3. Use the numerical keypad to enter the measured data point at or near the boiling point of nitrogen (77.35 K).
  • Page 98 Lake Shore Model 332 Temperature Controller User’s Manual This Page Intentionally Left Blank 5-12 Advanced Operation...

  • Page 99: Computer Interface Operation

    ANALOG OUTPUT Terminal Block at the same time. Cable lengths are limited to 2 meters for each device and 20 meters for the entire bus. The Model 332 can drive a bus with up to 10 loads. If more instruments or cable length is required, a bus expander must be used.

  • Page 100: Changing Ieee-488 Interface Parameters

    Attention (ATN) line asserted low. The Model 332 recognizes two Multiline commands: LLO (Local Lockout ) – Prevents the use of instrument front panel controls. DCL (Device Clear) – Clears Model 332 interface activity and puts it into a bus idle state. Remote Operation...

  • Page 101: Common Commands

    Most device specific commands perform functions also performed from the front panel. Model 332 device specific commands are detailed in Paragraph 6.3 and summarized in Table 6-8.

  • Page 102: Status Registers

    Not Used New A&B If Service Request is enabled, any of these bits being set will cause the Model 332 to pull the SRQ management line low to signal the BUS CONTROLLER. These bits are reset to zero upon a serial poll of the Status Byte Register.

  • Page 103: Ieee Interface Example Programs

    Operation Complete (OPC), Bit (0) – This bit is generated in response to the Q OPC common command. It indicates when the Model 332 has completed all selected pending operations. It is not related to the Q OPC? command, which is a separate interface feature.

  • Page 104: Gpib Setting Configuration

    Lake Shore Model 332 Temperature Controller User’s Manual Figure 6-1. GPIB Setting Configuration Figure 6-2. DEV 12 Device Template Configuration Remote Operation...

  • Page 105: Visual Basic Ieee-488 Interface Program Setup

    Lake Shore Model 332 Temperature Controller User’s Manual 6.1.4.2 Visual Basic IEEE-488 Interface Program Setup This IEEE-488 interface program works with Visual Basic 6.0 (VB6) on an IBM PC (or compatible) with a Pentium-class processor. A Pentium 90 or higher is recommended, running Windows 95 or better.

  • Page 106: Ieee-488 Interface Program Control Properties

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-1. IEEE-488 Interface Program Control Properties Current Name Property New Value Label1 Name lblExitProgram Caption Type “exit” to end program. Label2 Name lblCommand Caption Command Label3 Name lblResponse Caption Response Text1...

  • Page 107: Visual Basic Ieee-488 Interface Program

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-2. Visual Basic IEEE-488 Interface Program Public gSend As Boolean 'Global used for Send button state Private Sub cmdSend_Click() 'Routine to handle Send button press gSend = True 'Set Flag to True...

  • Page 108: Ieee-488 Interface Board Installation For Quick Basic Program

    Lake Shore Model 332 Temperature Controller User’s Manual 6.1.4.3 IEEE-488 Interface Board Installation for Quick Basic Program This procedure works on an IBM PC (or compatible) running DOS or in a DOS window. This example uses the National Instruments GPIB-PCII/IIA card.

  • Page 109: Typical National Instruments Gpib Configuration From Ibconf.exe

    Lake Shore Model 332 Temperature Controller User’s Manual National Instruments National Instruments GPIB0 Configuration GPIB-PC2/2A Ver 2.1 Primary GPIB Address ..Primary GPIB Address ..à à 0 0 Select the primary GPIB address by é é Secondary GPIB Address ..NONE Secondary GPIB Address ..

  • Page 110: Quick Basic Ieee-488 Interface Program

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-3. Quick Basic IEEE-488 Interface Program IEEEEXAM.BAS EXAMPLE PROGRAM FOR IEEE-488 INTERFACE This program works with QuickBasic 4.0/4.5 on an IBM PC or compatible. The example requires a properly configured National Instruments GPIB-PC2 card. The REM $INCLUDE statement is necessary along with a correct path to the file QBDECL.BAS.

  • Page 111: Program Operation

    Lake Shore Model 332 Temperature Controller User’s Manual 6.1.4.5 Program Operation Once either example program is running, try the following commands and observe the response of the instrument. Input from the user is shown in bold and terminators are added by the program.

  • Page 112: Serial Interface Overview

    Lake Shore Model 332 Temperature Controller User’s Manual SERIAL INTERFACE OVERVIEW The serial interface used in the Model 332 is commonly referred to as an RS-232C interface. RS-232C is a standard of the Electronics Industries Association (EIA) that describes one of the most common interfaces between computers and electronic equipment.

  • Page 113: Character Format

    Lake Shore Model 332 Temperature Controller User’s Manual 6.2.3 Character Format A character is the smallest piece of information that can be transmitted by the interface. Each character is 10 bits long and contains data bits, bits for character timing and an error detection bit.

  • Page 114: Message Flow Control

    Lake Shore Model 332 Temperature Controller User’s Manual 6.2.5 Message Flow Control It is important to remember that the user program is in charge of the serial communication at all times. The instrument can not initiate communication, determine which device should be transmitting at a given time or guarantee timing between messages.

  • Page 115: Serial Interface Example Programs

    Lake Shore Model 332 Temperature Controller User’s Manual 6.2.7 Serial Interface Example Programs Two BASIC programs are included to illustrate the serial communication functions of the instrument. The first program was written in Visual Basic. Refer to Paragraph 6.2.7.1 for instructions on how to setup the program.

  • Page 116: Serial Interface Program Control Properties

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-5. Serial Interface Program Control Properties Current Name Property New Value Label1 Name lblExitProgram Caption Type “exit” to end program. Label2 Name lblCommand Caption Command Label3 Name lblResponse Caption Response Text1...

  • Page 117: Visual Basic Serial Interface Program

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-6. Visual Basic Serial Interface Program Public gSend As Boolean 'Global used for Send button state Private Sub cmdSend_Click() 'Routine to handle Send button press gSend = True 'Set Flag to True...

  • Page 118: Quick Basic Serial Interface Program Setup

    Lake Shore Model 332 Temperature Controller User’s Manual 6.2.7.2 Quick Basic Serial Interface Program Setup The serial interface program listed in Table 6-7 works with QuickBasic 4.0/4.5 or Qbasic on an IBM PC (or compatible) running DOS or in a DOS window with a serial interface. It uses the COM1 communication port at 9600 Baud.

  • Page 119: Program Operation

    Lake Shore Model 332 Temperature Controller User’s Manual 6.2.7.3 Program Operation Once either example program is running, try the following commands and observe the response of the instrument. Input from the user is shown in bold and terminators are added by the program.

  • Page 120: Command Summary

    Lake Shore Model 332 Temperature Controller User’s Manual COMMAND SUMMARY This paragraph provides a listing of the IEEE-488 and Serial Interface Commands. A summary of all the commands is provided in Table 6-8. All the commands are detailed in Paragraph 6.3.1, which is presented in alphabetical order.

  • Page 121: Command Summary

    Lake Shore Model 332 Temperature Controller User’s Manual Table 6-8. Command Summary Command Function Page Command Function Page Q CLS Clear Interface Cmd ....... 24 HTR? Heater Output Query ......32 Q ESE Event Status Enable Cmd ...... 24 HTRST? Heater Status Query .......

  • Page 122: Interface Commands (Alphabetical Listing)

    Lake Shore Model 332 Temperature Controller User’s Manual 6.3.1 Interface Commands (Alphabetical Listing) QCLS Clear Interface Command QCLS[term] Input: Remarks: Clears the bits in the Status Byte Register and Standard Event Status Register and terminates all pending operations. Clears the interface, but not the controller. The related controller command is QRST .
  • Page 123 Lake Shore Model 332 Temperature Controller User’s Manual Operation Complete Command QOPC[term] Input: Remarks: Generates an Operation Complete event in the Event Status Register upon completion of all pending selected device operations. Send it as the last command in a command string.
  • Page 124 Input: Returned: <status>[term] Format: <status> 0 = no errors found, 1 = errors found Remarks: The Model 332 reports status based on test done at power up. QWAI Wait-to-Continue Command QWAI[term] Input: Remarks: This command is not supported in the Model 332.
  • Page 125 Lake Shore Model 332 Temperature Controller User’s Manual ALMRST Reset Alarm Status Command Input: ALMRST[term] Remarks: Clears both the high and low status of all alarms, including latching alarms. ANALOG Analog Output Parameter Command Input: ANALOG <bipolar enable>, <mode>, <input>, <source>, <high value>, <low value>, <manual value>[term]...
  • Page 126 Lake Shore Model 332 Temperature Controller User’s Manual BEEP Alarm Beeper Command Input: BEEP <state>[term] Format: <state> 0 = Off, 1 = On. Remarks: Enables or disables system beeper sound when an alarm condition is met. BEEP? Alarm Beeper Query...
  • Page 127 Lake Shore Model 332 Temperature Controller User’s Manual CRVDEL Curve Delete Command Input: CRVDEL <curve>[term] Format: <curve> Specifies a user curve to delete. Valid entries: 21 – 41. Example: CRVDEL 21[term] – Deletes User Curve 21. CRVHDR Curve Header Command Input: CRVHDR <curve>, <name>, <SN>, <format>, <limit value>,...
  • Page 128 Lake Shore Model 332 Temperature Controller User’s Manual CRVPT? Curve Data Point Query Input: CRVPT? <curve>, <index>[term] Format: nn,nnn <curve> Specifies which curve to query: 1 – 41. <index> Specifies the points index in the curve: 1 – 200. Returned: <units value>, <temp value>[term] Format: ±nnnnnnn,±nnnnnnn...
  • Page 129 Model 330 locations. For example, the DT-500-D Curve, found at curve location 3 in the Model 332, is mapped to location 0 when in 330 mode. This applies to the following remote commands: ACUR, ACUR?, BCUR, BCUR?. The following Model 330 commands are not supported in 330 Emulation Mode: CUID?, CURV, CURV?, ECUR, KCUR, and SCAL.
  • Page 130 Lake Shore Model 332 Temperature Controller User’s Manual HTR? Heater Output Query Input: HTR?[term] Returned: <heater value>[term] +nnn.n Format: <heater value> Loop 1 heater output in percent (%). Use AOUT? for Loop 2. HTRST? Heater Status Query Input: HTRST?[term] Returned: <error code>[term] Format: <error code>...
  • Page 131 Lake Shore Model 332 Temperature Controller User’s Manual INTYPE Input Type Parameter Command Input: INTYPE <input>, <sensor type>, <compensation>[term] a,n,n Format: <input> Specifies input to configure: A or B. <sensor type> Specifies input sensor type. Valid entries: 8 = NTC RTD 75mV 75 Ω...
  • Page 132 Lake Shore Model 332 Temperature Controller User’s Manual LDAT? Linear Equation Data Query Input: LDAT? <input>[term] Format: a <input> Specifies which input to query: A or B. Returned: <linear value>[term] Format: ±nnnnnn Remarks: Also see the RDGST? command. LINEAR Input Linear Equation Parameter Command Input: LINEAR <input>, <equation>, <varM value>, <X source>, <B source>,...
  • Page 133 Remarks: Resets the minimum and maximum data for all inputs. MODE Remote Interface Mode Command Input: MODE <mode>[term] Format: <mode> 0 = local, 1 = remote, 2 = remote with local lockout. Example: MODE 2[term] – Places the Model 332 into remote mode with local lockout. Remote Operation 6-35...
  • Page 134 Lake Shore Model 332 Temperature Controller User’s Manual MODE? Remote Interface Mode Query Input: MODE?[term] Returned: <mode>[term] (Refer to command for description) Format: MOUT Control Loop Manual Heater Power (MHP) Output Command Input: MOUT <loop>, <value>[term] n,±nnnnnn[term] Format: <loop> Specifies loop to configure: 1 or 2.
  • Page 135 Lake Shore Model 332 Temperature Controller User’s Manual RAMP Control Setpoint Ramp Parameter Command Input: RAMP <loop>, <off/on>, <rate value>[term] n,n,±nnnnn Format: <loop> Specifies which loop to configure: 1 or 2. <off/on> Specifies whether ramping is 0 = Off or 1 = On.
  • Page 136 Lake Shore Model 332 Temperature Controller User’s Manual RDGST? Input Reading Status Query Input: RDGST? <input>[term] Format: a <input> Specifies which input to query: A or B. Returned: <status bit weighting>[term] Format: nnn Remarks: The integer returned represents the sum of the bit weighting of the input status flag bits.
  • Page 137 Lake Shore Model 332 Temperature Controller User’s Manual SCAL Generate SoftCal Curve Command Input: SCAL <std>, <dest>, <SN>, <T1 value>, <U1 value>, <T2 value>, <U2 value>, <T3 value>, <U3 value>[term] n,nn,aaaaaaaaaa,±nnnnnn,±nnnnnn,±nnnnnn,±nnnnnn,±nnnnnn,±nnnnnn Format: <std> Specifies the standard curve to generate a SoftCal from. Valid entries: 1, 6, 7.
  • Page 138 Lake Shore Model 332 Temperature Controller User’s Manual TEMP? Thermocouple Junction Temperature Query Input: TEMP? Returned: <junction temperature>[term] ±nnnnnnn Format: Remarks: Temperature is in kelvin. TUNEST? Control Tuning Status Query Input: TUNEST? Returned: <tuning status>[term] 0 = no active tuning, 1 = active tuning.

  • Page 139: Options And Accessories

    CHAPTER 7 OPTIONS AND ACCESSORIES GENERAL This chapter provides Model 332 Temperature Controller options and accessories. Model numbers are detailed in Paragraph 7.1, options in Paragraph 7.2, accessories in Paragraph 7.3, and the Model 3003 Heater Output Conditioner in Paragraph 7.4.

  • Page 140: Accessories

    Detachable 120 VAC Line Cord. Heater Output Conditioner. The heater output conditioner is a passive filter which further reduces the already low heater output noise of the Model 332. For details, refer to 3003 Paragraph 7.4 and see Figure 7-2.

  • Page 141: Model 3507-2Sh Cable Assembly

    MAN-332* Model 332 Temperature Controller User’s Manual. Half-Rack Mounting Kit for One Model 332 Temperature Controller. Half-length mounting panel and mounting ears to attach one Model 332 to a 483 mm (19-inch) rack RM-1/2 mount space. See Figure 7-3.

  • Page 142: Model 3003 Heater Output Conditioner

    The Lake Shore Model 3003 Heater Output Conditioner is a passive filter which reduces the already low noise present in the heater output of the Model 332. The Model 3003 connects between the heater output terminals on the rear panel of a controller and a resistive heater. See Figure 7-2.

  • Page 143: Model Rm-1/2 Rack-Mount Kit

    Lake Shore Model 332 Temperature Controller User’s Manual C-331-7-3.eps Figure 7-3. Model RM-1/2 Rack-Mount Kit Options and Accessories...
  • Page 144 Lake Shore Model 332 Temperature Controller User’s Manual Refer to “Installation Procedure” Installation Procedure Installation Procedure Use 5/64 inch (2 mm) hex key to remove two 6-32 x 1/4 black button head screws from side of instrument. Place Instrument on shelf.

  • Page 145: Service

    SERVICE GENERAL This chapter describes the service for the Model 332 Temperature Controller. Paragraph 8.1 provides a description of Electrostatic Discharge (ESD), line voltage selection in Paragraph 8.2, fuse replacement in Paragraph 8.3, rear panel connector definitions in Paragraph 8.4, top of enclosure remove and replace procedure in Paragraph 8.5, firmware and NOVRAM replacement in Paragraph 8.6,...

  • Page 146: Line Voltage Selection

    Lake Shore Model 332 Temperature Controller User’s Manual LINE VOLTAGE SELECTION Use the following procedure to change the instrument line voltage selector. Verify the fuse value whenever line voltage is changed. WARNING: To avoid potentially lethal shocks, turn off controller and disconnect it from AC power before performing these procedures.

  • Page 147: Rear Panel Connector Definitions

    Lake Shore Model 332 Temperature Controller User’s Manual Fuse Replacement (Continued) 5. Remove existing fuses. Replace with proper Slow-Blow (time-delay) fuse ratings as follows: 100/120 V 1.6 A T 250 V 5 × 20 mm 220/240 V 0.75 A T 250 V 5 ×...

  • Page 148: Rs-232 Connector Details

    Lake Shore Model 332 Temperature Controller User’s Manual Slides into slot at rear of Model 332 Use screwdriver to lock or unlock wires Terminal Block Connector Insert wire Lake Shore P/N 106-739 into slot C-332-8-4.eps Description Relay 1 – Normally Closed (NC) Relay 1 –...

  • Page 149: Serial Interface Cable Wiring

    Lake Shore Model 332 Temperature Controller User’s Manual 8.4.1 Serial Interface Cable Wiring The following are suggested cable wiring diagrams for connecting the Model 332 Serial Interface to various Customer Personal Computers (PCs). Model 332 to PC Serial Interface – PC with DE-9P...

  • Page 150: Ieee-488 Interface Connector

    The total length of cable allowed in a system is 2 meters for each device on the bus, or 20 meters maximum. The Model 332 can drive a bus of up to 10 devices. A connector extender is required to use the IEEE-488 Interface and Relay Terminal Block at the same time.

  • Page 151: Top Of Enclosure Remove And Replace Procedure

    Has a sticker on top labeled “M332F.HEX” and a date. • Non-Volatile Random Access Memory (NOVRAM) (U23) – Contains instrument settings and user curves. The NOVRAM is replaced when the customer purchases a Model 8002-05-332 CalCurve™. Refer to Paragraph 7.2.

  • Page 152: Loop 2 / Analog Output Range Selection

    4. Follow the top of enclosure INSTALLATION procedure in Paragraph 8.5. JUMPERS There are seven jumpers located on the main circuit board of the Model 332. See Figure 8-7 for the location of the jumpers (reference designators JMP1 thru JMP8).

  • Page 153: Error Messages

    Lake Shore Model 332 Temperature Controller User’s Manual ERROR MESSAGES The following are error message that may be displayed by the Model 332 during operation. Message Description Input is turned off. D is ab le d Input has no curve.

  • Page 154: Location Of Internal Components

    Lake Shore Model 332 Temperature Controller User’s Manual P-332-8-7.bmp Figure 8-7. Location Of Internal Components 8-10 Service...

  • Page 155: 8.10 Calibration Procedure

    Lake Shore Model 332 Temperature Controller User’s Manual 8.10 CALIBRATION PROCEDURE The Model 332 requires calibration of both of the sensor inputs and analog output to operate within specification. None of the other circuits require calibration. The sensor inputs may be configured as diode/resistor or thermocouple and the calibration process differs for each.

  • Page 156: 8.10.2 Diode/Resistor Sensor Input Calibration

    8.10.2.1 Sensor Input Calibration Setup and Serial Communication Verification Allow the Model 332 to warm up for at least one hour with 100 kΩ resistors attached to all inputs configured as diode/resistor and all thermocouple inputs shorted. Connect the Model 332 to the PC via the serial port.

  • Page 157: Diode Input Ranges Calibration

    10 µA Current Source Calibration and 1 µA, 100 µA, 1 mA Current Source Output Verification (Continued) 7. Attach the 75 kΩ resistor to the Model 332 input using proper 4-lead connection techniques, configure the DMM to read VDC and attach to the resistor.

  • Page 158: Resistive Input Ranges Calibration

    To determine the input offset and gain errors when the input is configured for the resistive ranges and provide offset and gain calibration constants back to the Model 332. This step will calibrate all resistive ranges with reversing both on and off.

  • Page 159: Thermocouple Sensor Input Calibration

    Calibration Process 8.10.3.1 Sensor Input Calibration Setup Allow the Model 332 to warm up for at least 1 hour with shorts placed across all thermocouple sensor inputs. If calibrating a dual thermocouple Model 332, leave a short across the input not currently being calibrated.

  • Page 160: Thermocouple Input Ranges Calibration

    Purpose To determine the input offset and gain errors when the input is configured for the thermocouple ranges and provide offset and gain calibration constants back to the Model 332. Process 1. Configure the input for the thermocouple range to be calibrated. Turn Room Cal off.

  • Page 161: Analog Output Calibration

    Lake Shore Model 332 Temperature Controller User’s Manual 8.10.4 Analog Output Calibration Overview The Model 332 has one analog output which requires calibration. Zero offset and gain errors are calibrated out by programming offset and gain constants to the instrument. Calibration Process 8.10.4.1 Analog Output Calibration...

  • Page 162: Calibration Specific Interface Commands

    Lake Shore Model 332 Temperature Controller User’s Manual 8.10.5 Calibration Specific Interface Commands CALG Gain Calibration Constant Command CALG <input>, <type>, <value>[term] Input: a,nn,±nnnnnnn Format: <input> Specifies which input or analog output the gain calibration constant will be provided to. Valid entries are A or B for inputs and V for the analog output.
  • Page 163 Lake Shore Model 332 Temperature Controller User’s Manual CALRSTZ Reset Zero Offset Calibration Constant Command CALRSTZ <input>, <type>[term] Input: a,nn Format: <input> Specifies which input for which to reset the zero offset calibration constant to the default value. Valid entries are A or B for inputs and V for the analog output.
  • Page 164 Lake Shore Model 332 Temperature Controller User’s Manual This Page Intentionally Left Blank 8-20 Service...
  • Page 165 Lake Shore Model 332 Temperature Controller User’s Manual APPENDIX A GLOSSARY OF TERMINOLOGY absolute zero . The temperature of –273.16 °C, or –459.69 °F, or 0 K, thought to be the temperature at which molecular motion vanishes and a body would have no heat energy.
  • Page 166 Lake Shore Model 332 Temperature Controller User’s Manual autotuning . In Lake Shore Temperature Controllers, the Autotuning algorithm automatically determines the proper settings for Gain (Proportional), Reset (Integral), and Rate (Derivative) by observing the time response of the system upon changes in setpoint.
  • Page 167 Lake Shore Model 332 Temperature Controller User’s Manual decibels (dB) . A unit for describing the ratio of two powers or intensities, or the ratio of a power to a reference power; equal to one-tenth bel; if P and P...
  • Page 168 Lake Shore Model 332 Temperature Controller User’s Manual gilbert (Gb) . A cgs electromagnetic unit of the magnetomotive force required to produce one maxwell of magnetic flux in a magnetic circuit of unit reluctance. One gilbert is equal to 10/4 π ampere-turn. Named for William Gilbert (1540 –...
  • Page 169 Lake Shore Model 332 Temperature Controller User’s Manual Kelvin Scale . The Kelvin Thermodynamic Temperature Scale is the basis for all international scales, including the ITS-90. It is fixed at two points: the absolute zero of temperature (0 K), and the triple point of water (273.16 K), the equilibrium temperature that pure water reaches in the presence of ice and its own vapor.
  • Page 170 Lake Shore Model 332 Temperature Controller User’s Manual National Institute of Standards and Technology (NIST) . Government agency located in Gaithersburg, Maryland and Boulder, Colorado, that defines measurement standards in the United States. noise (electrical). Unwanted electrical signals that produce undesirable effects in circuits of control systems in which they occur.
  • Page 171 Lake Shore Model 332 Temperature Controller User’s Manual relief valve . A type of pressure relief device which is designed to relieve excessive pressure, and to reclose and reseal to prevent further flow of gas from the cylinder after reseating pressure has been achieved.
  • Page 172 Lake Shore Model 332 Temperature Controller User’s Manual susceptance . In electrical terms, susceptance is defined as the reciprocal of reactance and the imaginary part of the complex representation of admittance: [suscept(ibility) + (conduct)ance]. susceptibility (χ) . Parameter giving an indication of the response of a material to an applied magnetic field. The susceptibility is the ratio of the magnetization (M) to the applied field (H).
  • Page 173 Lake Shore Model 332 Temperature Controller User’s Manual APPENDIX B TEMPERATURE SCALES B1.0 DEFINITION Temperature is a fundamental unit of measurement which describes the kinetic and potential energies of the atoms and molecules of bodies. When the energies and velocities of the molecules in a body are increased, the temperature is increased whether the body is a solid, liquid, or gas.
  • Page 174 Lake Shore Model 332 Temperature Controller User’s Manual Table B-1. Temperature Conversion Table °F °C °F °C °F °C -459.67 -273.15 -292 -180 93.15 -129.67 -89.82 183.33 -454 -270 3.15 -290 -178.89 94.26 -120 -84.44 188.71 -450 -267.78 5.37 -289.67 -178.71...
  • Page 175 C1.0 GENERAL Use of liquid helium (LHe) and liquid nitrogen (LN ) is often associated with the Model 332 Temperature Controller. Although not explosive, there are a number of safety considerations to keep in mind in the handling of LHe and LN C2.0 PROPERTIES...
  • Page 176 Lake Shore Model 332 Temperature Controller User’s Manual C4.0 LIQUID HELIUM AND NITROGEN SAFETY PRECAUTIONS Transferring LHe and LN and operation of the storage dewar controls should be in accordance with the manufacturer/supplier’s instructions. During this transfer, it is important that all safety precautions written on the storage dewar and recommended by the manufacturer be followed.
  • Page 177 Lake Shore Model 332 Temperature Controller User’s Manual APPENDIX D CURVE TABLES D1.0 GENERAL Standard curve tables included in the Model 332 Temperature Controller are as follows: Curve 01 DT-470 Silicon Diode ........... Table D-1 Curve 02 DT-670 Silicon Diode ........... Table D-2 Curve 03 &...
  • Page 178 Lake Shore Model 332 Temperature Controller User’s Manual Table D-2. Standard DT-670 Diode Curve Breakpoint Temp. (K) Breakpoint Temp. (K) Breakpoint Temp. (K) 0.090570 500.0 1.01064 87.0 1.19475 20.2 0.110239 491.0 1.02125 81.0 1.24208 17.10 0.136555 479.5 1.03167 75.0 1.26122 15.90...
  • Page 179 Lake Shore Model 332 Temperature Controller User’s Manual Table D-4. Lake Shore PT-100/-1000 Platinum RTD Curves Break- PT-100 PT-1000 point Temp. (K) Temp. (K) Ohms (Ω) Ohms (Ω) 030.0 3.820 030.0 38.20 032.0 4.235 032.0 42.35 036.0 5.146 036.0 51.46 038.0...
  • Page 180 Lake Shore Model 332 Temperature Controller User’s Manual Table D-5. Lake Shore RX-102A Rox™ Curve Break- Temp. Break- Temp. Break- Temp. logΩ logΩ logΩ point point point 3.17838 3.02081 40.0 3.05186 13.50 2.96 3.18540 3.02133 38.8 3.05322 13.10 2.81 3.19253 3.02184...
  • Page 181 Lake Shore Model 332 Temperature Controller User’s Manual Table D-6. Lake Shore RX-202A Rox™ Curve Break- Temp. Break- Temp. Break- Temp. logΩ logΩ logΩ point point point 3.35085 40.0 3.40482 11.45 3.52772 2.17 3.35222 38.5 3.40688 11.00 3.53459 2.04 3.35346 37.2...
  • Page 182 Lake Shore Model 332 Temperature Controller User’s Manual Table D-7. Type K (Nickel-Chromium vs. Nickel-Aluminum) Thermocouple Curve Break- Temp Break- Temp Break- Temp Break- Temp point point point point -6.45774 3.15 -6.10828 57.4 -2.95792 18.1482 714.5 -6.45733 3.68 -6.08343 59.4 -2.82629...
  • Page 183 Lake Shore Model 332 Temperature Controller User’s Manual Table D-8. Type E (Nickel-Chromium vs. Copper-Nickel) Thermocouple Curve Breakpt Temp (K) Breakpt Temp (K) Breakpt Temp (K) -9.834960 3.15 -8.713010 77.50 0.701295 285.00 -9.834220 3.59 -8.646710 80.00 1.061410 291.00 -9.833370 4.04 -8.578890...
  • Page 184 Lake Shore Model 332 Temperature Controller User’s Manual Table D-9. Type T (Copper vs. Copper-Nickel) Thermocouple Curve Break- Break- Break- Temp (K) Temp (K) Temp (K) point point point -6.257510 3.15 -5.424100 84.00 0.623032 289.00 -6.257060 3.56 -5.380600 86.50 0.843856 294.50...
  • Page 185 Lake Shore Model 332 Temperature Controller User’s Manual Table D-10. Chromel-AuFe0.03% Thermocouple Curve * Breakpoint Temp (K) Breakpoint Temp (K) -4.6667 -2.24537 -4.62838 6.35 -2.06041 -4.60347 8.15 -1.86182 180.5 -4.58043 9.75 -1.66004 -4.53965 12.5 -1.47556 200.5 -4.47226 16.95 -1.0904 -4.43743 19.3...
  • Page 186 Lake Shore Model 332 Temperature Controller User’s Manual Table D-11. Chromel-AuFe0.07% Thermocouple Curve Break- Temp Break- Temp Break- Temp point point point -5.279520 3.15 -3.340820 115.00 1.313400 332.50 -5.272030 3.78 -3.253410 119.50 1.511140 341.50 -5.263500 4.46 -3.165360 124.00 1.709250 350.50 -5.253730...

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