Lakeshore 240-8P User Manual

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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. 1.7 P/N 119-241 8 November 2023
User’s Manual
240 Series
Cryogenic Sensor Input Module
Model 240-2P
Model 240-8P
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
sales@lakeshore.com
support@lakeshore.com
www.lakeshore.com
Fax: (614) 891-1392
Telephone: (614) 891-2243

Lakeshore 240-8P Specifications

General

Brand	Lakeshore
Model	240-8P
Category	Control Unit
Language	English

Summary

LAKE SHORE LIMITED WARRANTY

Manufacturer Limited Warranty

Outlines the warranty offered by the manufacturer on its products.

Warranty Period and Terms

Product Certification and Compliance

Chapter 1: Introduction

Product Description

Overviews the 240 Series input module's features and applications in cryogenic measurements.

Sensor Selection Guide

Safety Summary and Symbols

General Safety Precautions

Outlines essential safety measures for instrument operation, service, and repair.

Environmental Hazards

Details hazards related to cryogenic fluids (asphyxiation, frostbite) and operational environment conditions.

Specific Safety Guidelines

Provides guidance on grounding, ventilation, explosive atmospheres, and instrument modification.

Chapter 2: Cooling System Design and Temperature Control

General Considerations and Sensor Selection

Environmental Conditions and Measurement Accuracy

Measurement Accuracy Factors

Sensor Calibration Methods

Chapter 3: Installation

General Installation and Unpacking

Module Mounting and Connections

Physical Installation and Power/PROFIBUS Interface

Details DIN rail mounting, power supply, and PROFIBUS-DP interface setup.

Sensor Input Configuration and Wiring

Input Configuration, Lead Cables, and Grounding

Sensor Measurement and Polarity

Sensor Polarity and Four-Lead Measurement

Sensor Measurement Techniques

Two-Lead Measurement and Noise Reduction

Chapter 4: Configuration

General Configuration and Tools

Introduces configuration, USB connection, and software tools like MeasureLINK™.

MeasureLINK™ Configuration Process

Connecting and Using MeasureLINK™

Guides connecting to and using the MeasureLINK™ utility for module configuration.

MeasureLINK™ Interface and Module Settings

Interface Overview and Module Settings Configuration

Communication and Input Settings

PROFIBUS Communication and Input Settings

Covers PROFIBUS communication settings and general input configuration options.

Sensor Setup and Curve Configuration

General Settings, Sensor Setup, and Curve Selection

Details general settings, sensor setup, and configuring calibrated/standard curves.

Advanced Input Configuration Options

No Curve, Operating Modes, and Display Units

Readings Display and Values Management

Temperature/Sensor Values, Excitation, and Brightness

Chapter 5: Operation

General Operation, PROFIBUS Interface, and GSD File

Covers general operation, PROFIBUS-DP interface, GSD file, and modular station configuration.

Establishing PROFIBUS Communication

Communication States and Power On

Details establishing PROFIBUS communication and the initial power-on state.

PROFIBUS Communication State Transitions

Parameterization, Configuration, and Data Exchange States

Explains the parameterization, configuration, and data exchange states in PROFIBUS communication.

USB Interface Operation and Communication

USB Hardware, Driver Installation, and Communication Basics

Covers USB hardware, driver installation, and basic communication via message strings.

USB Message Flow Control

Message Strings and Flow Control Responsibility

USB Interface Command Summary

Command Structure and Summary Table

Explains command structure and provides a summary table of available USB interface commands.

USB Interface Command Reference

Command Key and Identification Query

PROFIBUS and Brightness Commands

PROFIBUS Address, Brightness, and Reading Commands

Curve and Default Commands

Curve Header, Data Point, and Factory Defaults Commands

Filter and Sensor Name Commands

Filter, Fahrenheit Reading, and Sensor Name Commands

Input Type Parameter Configuration

INTYPE Command for Sensor Configuration

Details the INTYPE command for setting sensor type, range, and units.

Kelvin, Module Name, and PROFIBUS Slot Commands

Kelvin Reading, Module Name, and PROFIBUS Slot Count Commands

PROFIBUS Slot, Status, and Reading Status Commands

PROFISLOT, PROFISTAT, and RDGST Commands

Details commands for PROFIBUS slot configuration, connection status, and reading status.

Chapter 7: Service

General Service and USB Troubleshooting

Instrument Reset, Errors, and ESD

Factory Reset, Error Messages, Calibration, and ESD

Firmware Updates and Memory Devices

Firmware Updates and Internal Memory Summary

Technical Inquiries and Equipment Returns

Contacting Support and Returning Equipment

Guides on contacting Lake Shore support and the process for returning equipment.