Lake Shore Model 218 Temperature Monitor User’s Manual
Table of Contents
i
TABLE OF CONTENTS
Chapter/Paragraph Title
Page
1 INTRODUCTION
.................................................................................................................................... 1-1
1.0 GENERAL
........................................................................................................................... 1-1
1.1 MODEL
218
FEATURES .................................................................................................... 1-3
1.2 MODEL
218
SPECIFICATIONS ......................................................................................... 1-4
1.3 SAFETY
.............................................................................................................................. 1-6
1.3.1
Handling Liquid Helium and Liquid Nitrogen ................................................................... 1-6
1.3.2 Safety Summary .............................................................................................................. 1-7
1.3.3 Safety Symbols ................................................................................................................ 1-7
2 SENSOR
CONSIDERATIONS ............................................................................................................... 2-1
2.0 GENERAL
........................................................................................................................... 2-1
2.1 TEMPERATURE
SENSOR SELECTION ........................................................................... 2-1
2.1.1 Temperature Range ......................................................................................................... 2-1
2.1.2 Sensor
Sensitivity ............................................................................................................ 2-1
2.1.3 Environmental Conditions ................................................................................................ 2-1
2.1.4 Measurement Accuracy ................................................................................................... 2-2
2.1.5 Sensor Package .............................................................................................................. 2-2
2.2 CALIBRATED
SENSORS ................................................................................................... 2-2
2.2.1 Traditional Calibration ...................................................................................................... 2-2
2.2.2 SoftCal™
.......................................................................................................................... 2-2
2.2.3 Standard
Curves .............................................................................................................. 2-3
2.2.4 CalCurve™
...................................................................................................................... 2-4
2.3 SENSOR
INSTALLATION .................................................................................................. 2-4
2.3.1 Mounting
Materials .......................................................................................................... 2-4
2.3.2 Sensor
Location ............................................................................................................... 2-4
2.3.3 Thermal
Conductivity ....................................................................................................... 2-4
2.3.4 Contact Area .................................................................................................................... 2-5
2.3.5 Contact
Pressure
............................................................................................................. 2-5
2.3.6 Lead
Wire
......................................................................................................................... 2-6
2.3.7 Lead
Soldering ................................................................................................................. 2-6
2.3.8 Heat
Sinking Leads .......................................................................................................... 2-6
2.3.9 Thermal
Radiation ........................................................................................................... 2-6
2.3.10
Thermal EMF Compensation with Voltage Excitation ..................................................... 2-6
3 INSTALLATION ..................................................................................................................................... 3-1
3.0 GENERAL
........................................................................................................................... 3-1
3.1 INSPECTION
AND
UNPACKING ....................................................................................... 3-1
3.2 REPACKAGING
FOR
SHIPMENT ..................................................................................... 3-1
3.3
REAR PANEL DEFINITION ................................................................................................ 3-2
3.3.1 Line
Input Assembly ........................................................................................................ 3-2
3.3.2 Sensor Inputs ................................................................................................................... 3-4
3.3.3
Terminal Block (Model 218S ONLY) ............................................................................... 3-7
3.3.4 Computer
Interfaces ........................................................................................................ 3-8
4 OPERATION
.......................................................................................................................................... 4-1
4.0 GENERAL
........................................................................................................................... 4-1
4.1 DISPLAY
SCREEN
DESCRIPTION ................................................................................... 4-1
4.2 KEYPAD
DESCRIPTION .................................................................................................... 4-3
4.2.1 General
Keypad Operation .............................................................................................. 4-4
4.3 TURNING
POWER ON ....................................................................................................... 4-4
4.4 DISPLAY
SETUP ................................................................................................................ 4-4
Summary of Contents for 218S
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