Lakeshore 325 Manuals

Manuals and User Guides for Lakeshore 325. We have 2 Lakeshore 325 manuals available for free PDF download: User Manual

Lakeshore 325 User Manual

Lakeshore 325 User Manual (166 pages)

Brand: Lakeshore | Category: Temperature Controller | Size: 3.9 MB

Table of Contents

Table of Contents
7
Figure No.

13
Chapter/Section

13
Introduction

13
- Product Description
  13
- Model 325 Front View
  13
- Model 325 Rear Panel Connections
  14
  - Sensor Selection
    16
Table No.

16
- Sensor Temperature Range
  16
- Typical Sensor Performance
  17
  - Specifications
    18
  - Safety Summary
    20
    
    Options and Accessories
    20
    
    General
    20
  - Safety Symbols
    21
Cooling System Design

23
- General
  23
- Temperature Sensor Selection
  23
- Temperature Range
  23
- Sensor Sensitivity
  23
- Environmental Conditions
  23
- Measurement Accuracy
  24
- Sensor Package
  24
- Calibrated Sensors
  24
- Traditional Calibration
  24
- Softcal
  24
- Standard Curves
  25
- Silicon Diode Sensor Calibrations and Calcurve
  25
  - Calcurve
    26
  - Sensor Installation
    26
  - Mounting Materials
    26
  - Sensor Location
    26
  - Thermal Conductivity
    26
  - Contact Area
    26
  - Contact Pressure
    27
  - Lead Wire
    27
- Typical Sensor Installation in a Mechanical Refrigerator
  27
  - Lead Soldering
    28
  - Heat Sinking Leads
    28
  - Thermal Radiation
    28
  - Heater Selection and Installation
    28
  - Heater Resistance and Power
    28
  - Heater Location
    29
  - Heater Types
    29
  - Heater Wiring
    29
  - Considerations for Good Control
    29
  - Thermal Conductivity
    29
  - Thermal Lag
    29
  - Two-Sensor Approach
    29
  - Thermal Mass
    30
  - System Nonlinearity
    30
  - Pid Control
    30
  - Proportional (P)
    30
  - Integral (I)
    31
  - Derivative (D)
    31
  - Manual Heater Power (MHP) Output
    31
- Examples of PID Control
  32
  - Manual Tuning
    33
  - Setting Heater Range
    33
  - Tuning Proportional
    33
  - Tuning Integral
    34
  - Tuning Derivative
    34
  - Autotuning
    34
  - Zone Tuning
    35
Chapter/Section

37
Installation

37
- General
  37
- Inspection and Unpacking
  37
- Rear Panel Definition
  38
- Model 325 Rear Panel
  38
  - Line Input Assembly
    39
  - Line Voltage
    39
  - Line Fuse and Fuse Holder
    39
  - Power Cord
    39
  - Power Switch
    39
  - Diode/Resistor Sensor Inputs
    40
  - Sensor Input Connector and Pinout
    40
  - Sensor Lead Cable
    40
- Diode/Resistor Input Connector
  40
  - Grounding and Shielding Sensor Leads
    41
  - Sensor Polarity
    41
  - Four-Lead Sensor Measurement
    41
  - Two-Lead Sensor Measurement
    41
  - Lowering Measurement Noise
    42
  - Thermocouple Sensor Inputs
    42
  - Sensor Input Terminals
    42
- Thermocouple Input Definition and Common Connector Polarities
  42
  - Thermocouple Installation
    43
  - Grounding and Shielding
    43
  - Heater Output Setup
    43
  - Loop 1 Output
    43
  - Loop 1 Heater Output Connector
    43
  - Loop 1 Heater Output Wiring
    43
  - Loop 1 Heater Output Noise
    44
  - Loop 2 Output
    44
  - Loop 2 Output Resistance
    44
  - Loop 2 Output Connector
    44
  - Loop 2 Heater Protection
    44
  - Boosting the Output Power
    44
  - Initial Setup and System Checkout Procedure
    45
Operation

49
- General
  49
- Front Panel Description
  49
- Keypad Definitions
  49
- Model 325 Front Panel
  49
  - Annunciators
    50
  - General Keypad Operation
    50
  - Display Definition
    51
  - Turning Power on
    52
  - Display Format and Source (Units) Selection
    52
- Display Format Definition
  52
- Sensor Input Types
  54
- Sensor Curves
  58
  - Diode Sensor Curve Selection
    59
  - Resistor Sensor Curve Selection
    60
  - Thermocouple Sensor Curve Selection
    60
  - Filter
    60
  - Temperature Control
    61
  - Control Loops
    61
  - Control Modes
    62
  - Tuning Modes
    62
Chapter/Section

61
- Comparison of Control Loops 1 and 2
  62
  - Control Setup
    63
  - Manual Tuning
    64
  - Manually Setting Proportional (P)
    64
  - Manually Setting Integral (I)
    65
  - Manually Setting Derivative (D)
    65
  - Setting Manual Heater Power (MHP) Output
    66
  - AUTOTUNE (Closed-Loop PID Control)
    66
  - ZONE SETTINGS (Closed-Loop Control Mode)
    67
  - Setpoint
    70
  - 4.12 Ramp
    71
  - 4.13 Heater Range and Heater off
    72
  - 4.14 Heater Resistance Setting
    72
  - 4.15 Locking and Unlocking the Keypad
    73
  - 4.16 Remote/Local
    73
  - 4.17 Interface
    73
  - Default Values
    74
Advanced Operation

77
- General
  77
- Curve Numbers and Storage
  77
- Curve Header Parameters
  77
- Curve Breakpoints
  77
- Curve Header Parameters
  78
- Recommended Curve Parameters
  78
  - Front Panel Curve Entry Operations
    79
  - Edit Curve
    79
  - Thermocouple Curve Considerations
    81
  - Erase Curve
    81
  - Copy Curve
    82
  - Softcal
    82
  - Softcal with Silicon Diode Sensors
    83
  - Softcal Accuracy with Silicon Diode Sensors
    83
- Softcal Temperature Ranges for Silicon Diode Sensors
  83
  - Softcal with Platinum Sensors
    84
  - Softcal Accuracy with Platinum Sensors
    84
- Softcal Temperature Ranges for Platinum Sensors
  84
  - Softcal Calibration Curve Creation
    85
Computer Interface Operation

87
- General
  87
- Ieee-488 Interface
  87
- IEEE-488 Interface Parameters
  87
- Remote/Local Operation
  88
- IEEE-488 Command Structure
  88
- Bus Control Commands
  88
- Common Commands
  89
- Device Specific Commands
  89
- Message Strings
  89
- Status System
  89
- Overview
  89
- Model 325 Status System
  90
- Binary Weighting of an 8-Bit Register
  91
- Register Clear Methods
  91
  - Status Register Sets
    92
- Standard Event Status Register
  92
  - Status Byte and Service Request (SRQ)
    93
- Operation Event Register
  93
- Status Byte Register and Service Request Enable Register
  94
- Programming Example to Generate an SRQ
  95
- GPIB Setting Configuration
  97
- DEV 12 Device Template Configuration
  97
- IEEE-488 Interface Program Control Properties
  98
- Visual Basic IEEE-488 Interface Program
  99
  - Program Operation
    100
  - Troubleshooting
    100
  - Serial Interface Overview
    101
  - Physical Connection
    101
  - Hardware Support
    101
Chapter/Section

101
- Serial Interface Specifications
  101
  - Character Format
    102
  - Message Strings
    102
  - Message Flow Control
    102
  - Changing Baud Rate
    103
  - Serial Interface Example Program
    103
  - Visual Basic Serial Interface Program Setup
    103
- Serial Interface Program Control Properties
  104
- Visual Basic Serial Interface Program
  105
  - Program Operation
    106
  - Troubleshooting
    106
  - Command Summary
    107
  - Command Summary
    108
  - Interface Commands (Alphabetical Listing)
    109
Options and Accessories

123
- General
  123
- Models
  123
- Options
  123
- Accessories
  124
- Model 325 Sensor and Heater Cable Assembly
  125
- Model RM-1/2 Rack-Mount Kit
  126
Service

129
Appendix A - Glossary of Terminology

147
Appendix B - Temperature Scales

153
Appendix C - Handling of Liquid Helium and Nitrogen

155
Appendix Dcurve Tables

157

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Lakeshore 325 User Manual

Lakeshore 325 User Manual (8 pages)

temperature controller

Brand: Lakeshore | Category: Controller | Size: 0.6 MB

Table of Contents

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