Measurement USB-231 User Manual

USB-202

User's Guide

Document Revision 3
November 2014
© Copyright 2014

Analog and Digital I/O

HM USB-202.docx

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Table of Contents

Preface

About this User's Guide ....................................................................................................................... 5

What you will learn from this user's guide ......................................................................................................... 5

Conventions in this user's guide ......................................................................................................................... 5

Where to find more information ......................................................................................................................... 5

Chapter 1

Introducing the USB-202 ...................................................................................................................... 6

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

Chapter 2

Installing the USB-202 .......................................................................................................................... 7

Unpacking........................................................................................................................................................... 7

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

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

Calibrating the hardware..................................................................................................................................... 7

Factory calibration ............................................................................................................................................................ 7

Field calibration ................................................................................................................................................................ 7

Chapter 3

Functional Details ................................................................................................................................. 8

Analog input acquisition modes ......................................................................................................................... 8

Software paced mode ........................................................................................................................................................ 8

Hardware paced mode....................................................................................................................................................... 8

External components .......................................................................................................................................... 8

Screw terminals................................................................................................................................................................. 9

USB connector .................................................................................................................................................................. 9

LED indicators .................................................................................................................................................................. 9

Signal connections ............................................................................................................................................ 10

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

External clock I/O ............................................................................................................................................................10

Analog output ..................................................................................................................................................................10

Digital I/O ........................................................................................................................................................................10

Trigger input ....................................................................................................................................................................11

Counter input ...................................................................................................................................................................11

Voltage output .................................................................................................................................................................11

Ground ................................................................................................................................................................ .............11

Mechanical drawings ................................................................................................................................ ........ 12

Chapter 4

Specifications ...................................................................................................................................... 14

Analog input ..................................................................................................................................................... 14

Accuracy ........................................................................................................................................................... 14

Analog input DC voltage measurement accuracy ............................................................................................................14

Noise performance ...........................................................................................................................................................15

Analog input calibration ................................................................................................................................... 15

Analog output ................................................................................................................................................... 15

Digital input/output........................................................................................................................................... 16

External digital trigger ...................................................................................................................................... 16

External pacer input/output............................................................................................................................... 17

Counter ............................................................................................................................................................. 18

Memory ............................................................................................................................................................ 18

Power ................................................................................................................................................................ 18

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USB-202 User's Guide

USB specifications ........................................................................................................................................... 19

Environmental .................................................................................................................................................. 19

Mechanical ....................................................................................................................................................... 19

Screw terminal connector ................................................................................................................................. 19

Declaration of Conformity .................................................................................................................. 20

4

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-202 data acquisition device and lists device
specifications.

Conventions in this user's guide

For more information

Text presented in a box signifies additional information related to the subject matter.
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.

Preface

Where to find more information

Additional information about USB-202 hardware is available on our website at www.mccdaq.com. You can
also contact Measurement Computing Corporation with specific questions.

 Knowledgebase: kb.mccdaq.com
 Tech support form: www.mccdaq.com/support/support_form.aspx
 Email: [e-mail]
 Phone: [phone] and follow the instructions for reaching Tech Support

For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.

5

Chapter 1

Introducing the USB-202

The USB-202 is a USB 2.0 full-speed device that provides the following features:

 Eight single-ended 12-bit analog inputs
 100 kS/s max sample rate
 Two 12-bit analog outputs
 Eight individually configurable digital I/O channels
 32-bit counter input
 Digital trigger input
 External pacer clock input
 Internal/external pacer clock output
 User voltage output
 Two screw terminal banks for field wiring connections

The USB-201 is powered by the +5 V USB supply from your computer; no external power is required. A USB
cable is shipped with the device.

Functional block diagram

Device functions are illustrated in the block diagram shown here.

Figure 1. USB-202 functional block diagram

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Chapter 2

Installing the USB-202

Unpacking

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the device from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.

Contact us immediately if any components are missing or damaged.

Installing the software

Refer to the MCC DAQ Quick Start for instructions on installing the software on the MCC DAQ CD. Refer to
the device product page on the Measurement Computing website for information about the included and
optional software supported by the USB-202.

Install the software before you install your device

The driver needed to run the USB-202 is installed with the software. Therefore, you need to install the software
package you plan to use before you install the hardware.

Installing the hardware

Connect the USB cable to an available USB port on the computer or to an external USB hub connected to the
computer. Connect the other end of the cable to the USB connector on the device. No external power is
required.

When connected for the first time, a Found New Hardware dialog opens when the operating system detects the
device. When the dialog closes, the installation is complete. The device Status LED turns on after the device is
successfully installed.

If the Status LED turns off

If communication is lost between the device and the computer, the Status LED turns off. To restore
communication, disconnect the USB cable from the computer and then reconnect it. This should restore
communication, and the Status LED should turn on.

Calibrating the hardware

Factory calibration

The Measurement Computing Manufacturing Test department performs the initial factory calibration. Return
the device to Measurement Computing Corporation when calibration is required. The recommended calibration
interval is one year.

Field calibration

Field calibration is not supported.

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