Measurement USB-2020 User Manual

USB-2001-TC

User's Guide

Document Revision 5
April 2012
© Copyright 2012

USB-based Thermocouple Input

HM USB-2001-TC.docx

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Table of Contents

Preface

About this User's Guide ....................................................................................................................... 4

What you will learn from this user's guide ......................................................................................................... 4

Conventions in this user's guide ......................................................................................................................... 4

Where to find more information ......................................................................................................................... 4

Chapter 1

Introducing the USB-2001-TC .............................................................................................................. 5

Functional block diagram ................................................................................................................................... 6

Chapter 2

Installing the USB-2001-TC .................................................................................................................. 7

What comes with your USB-2001-TC shipment? .............................................................................................. 7

Hardware .......................................................................................................................................................................... 7

Documentation ................................ ................................................................ ................................................................ .. 7

Unpacking the USB-2001-TC ............................................................................................................................ 7

Installing the software ........................................................................................................................................ 7

Installing the hardware ....................................................................................................................................... 7

Programming and developing applications ......................................................................................................... 8

Chapter 3

Functional Details ................................................................................................................................. 9

Components ........................................................................................................................................................ 9

Thermocouple input .......................................................................................................................................................... 9

USB connector .................................................................................................................................................................10

LED indicator ..................................................................................................................................................................10

Analog input circuitry ....................................................................................................................................... 10

Open-thermocouple detection (OTD) ..............................................................................................................................10

Thermocouple measurement accuracy .............................................................................................................. 11

Cold-junction temperature measurement accuracy ..........................................................................................................11

Mechanical drawings ................................................................................................................................ ........ 11

Chapter 4

Specifications ...................................................................................................................................... 12

Channel configurations ..................................................................................................................................... 12

Compatible thermocouples ............................................................................................................................... 13

Temperature accuracy ....................................................................................................................................... 13

LED indicator ................................................................................................................................................... 16

Power ................................................................................................................................................................ 16

Safety voltages .................................................................................................................................................. 17

Bus interface ..................................................................................................................................................... 17

Mechanical ....................................................................................................................................................... 17

Environment ..................................................................................................................................................... 17

Declaration of Conformity .................................................................................................................. 18

3

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-2001-TC data acquisition device and lists device
specifications.

Conventions in this user's guide

For more information

Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information

Additional information about the USB-2001-TC is available on our website at www.mccdaq.com. You can also
contact Measurement Computing Corporation by phone, fax, or email with specific questions.

 Phone: [phone] and follow the instructions for reaching Tech Support
 Fax: [phone] to the attention of Tech Support
 Email: [e-mail]

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Chapter 1

Introducing the USB-2001-TC

The USB-2001-TC is supported under the following operating systems:

 Microsoft Windows 7/Vista/XP (32-bit or 64-bit)
 Macintosh (32-bit or 64-bit)
 Linux (32-bit or 64-bit)

The USB-2001-TC is a USB 2.0 full-speed device. It is designed for USB 2.0 ports, and was tested for full
compatibility with both USB 1.1 and USB 2.0 ports.

The USB-2001-TC provides one thermocouple input channel. Thermocouple types J, K, R, S, T, N, E, and B
are supported. The thermocouple type is software programmable and stored on the device. A 20-bit ADC
processes the data conversions.

Thermocouple input ranges are ±73.125 mV (calibrated) and ±146.25 mV, (not calibrated). The ±146.25 mV
range is used for open thermocouple detection.

The device has an integrated cold junction compensation (CJC) sensor for thermocouple measurements. An
open thermocouple detection feature lets you detect a broken thermocouple.

The USB-2001-TC is a standalone plug-and-play module which draws power from the USB cable. No external
power supply is required.

The USB-2001-TC ships with DAQFlex software. All configurable options are software programmable. The
device is fully software calibrated.

Figure 1. USB-2001-TC

5

USB-2001-TC User's Guide Introducing the USB-2001-TC

Functional block diagram

USB-2001-TC functions are illustrated in the block diagram shown here.

Figure 2. USB-2001-TC functional block diagram

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