Omega Products OMET-USB-73R-T16 Installation Manual

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User’s Guide

OMET-USB SERIES

8, 16 and 32 Channel

Thermocouple Measurement

Systems for the USB Bus

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regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

OMET-USB-73 User Manual USB Data Acquisition

Table of Contents

1 Introduction.................................................................................................................................................1-1

1.1 Features – OMET-USB-73 Commercial Version..........................................................................................1-2

1.2 Operating Systems and API Software..........................................................................................................1-2

1.3 USB 73 Versions..........................................................................................................................................1-3

1.3.1 Temperature Input Series.....................................................................................................................................1-3

1.4 Software Support..........................................................................................................................................1-3

1.5 Contact Details.............................................................................................................................................1-3

2 Getting Started............................................................................................................................................2-1

2.1 Package Items..............................................................................................................................................2-1

2.2 Operating Systems for Specific Devices ......................................................................................................2-2

2.3 Installation ....................................................................................................................................................2-2

2.3.1 Microsoft Windows PnP Installation (Windows ME, 2000, XP)............................................................................2-2

2.3.2 Linux Installation (Kernel 2.4 and later) - Overview..............................................................................................2-3

2.4 Application Software - OmegaLog................................................................................................................2-3

3 Hardware Interface.....................................................................................................................................3-1

3.1 OMET-USB-73 External Application Connectors.........................................................................................3-1

3.2 Pin Assignments...........................................................................................................................................3-3

3.2.1 OMET-USB-73 DIO Connector – DB25 (M).........................................................................................................3-3

3.2.2 OMET-USB-73 Temperature Input – DB25 (M)...................................................................................................3-3

3.3 Pin Descriptions............................................................................................................................................3-4

3.3.1 Digital Inputs/Outputs (PA0-7, PB0-7, PC0-7)......................................................................................................3-4

3.3.2 Digital Ground (DGND).........................................................................................................................................3-4

3.3.3 Analog Ground (AGND)........................................................................................................................................3-4

3.3.4 Analog Inputs (ACH0-15)......................................................................................................................................3-4

3.3.5 Temperature Inputs (TCH0-7)+-...........................................................................................................................3-4

3.4 Bus Connectors............................................................................................................................................3-4

3.5 Power Supplies, Power Connectors.............................................................................................................3-5

3.6 Application Modules & Accessories..............................................................................................................3-5

3.6.1 Digital I/O Adapter Module – OMET-PC43A2......................................................................................................3-5

3.6.2 Thermocouple Adapter.........................................................................................................................................3-6

4 Software......................................................................................................................................................4-1

4.1 EDR Enhanced Application Program Interface (EDRE API)........................................................................4-1

4.2 The Query Command – EDRE_Query.........................................................................................................4-3

4.3 Digital Inputs/Outputs...................................................................................................................................4-5

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OMET-USB-73 User Manual USB Data Acquisition

4.3.1 Reading the Digital Inputs – EDRE_DioRead......................................................................................................4-5

4.3.2 Writing to the Digital Outputs – EDRE_DioWrite..................................................................................................4-6

4.3.3 Query Codes.........................................................................................................................................................4-8

4.4 Temperature Input – 73 Model.....................................................................................................................4-9

4.4.1 Thermocouple Procedure.....................................................................................................................................4-9

4.4.2 Reading CJC Channel..........................................................................................................................................4-9

4.4.3 Types of Thermocouples....................................................................................................................................4-10

4.4.4 Reading a Thermocouple Channel.....................................................................................................................4-10

4.4.5 Calculating Ambient Temperature......................................................................................................................4-10

4.4.6 Calculating Temperature for Thermocouples.....................................................................................................4-11

5 Calibration Procedure..............................................................................................................................5-13

5.1.1 Calibration - USB 73...........................................................................................................................................5-13

5.1.2 Equipment...........................................................................................................................................................5-13

5.1.3 Calibration Procedure – USB 73........................................................................................................................5-13

A Specifications.................................................................................................................................................I

A.1 Digital Input/Output Characteristics.............................................................................................................I

A.2 Temperature Input Characteristics..............................................................................................................I

A.3 Bus Interface..............................................................................................................................................II

A.3.1 USB 1.1...................................................................................................................................................................II

A.3.2 USB 2.0...................................................................................................................................................................II

A.4 Power Requirements..................................................................................................................................II

A.4.1 USB Devi ces............................................................................................................................................................II

A.5 Environmental / Physical............................................................................................................................II

A.5.1 USB.........................................................................................................................................................................II

A.6 Power Supplies.........................................................................................................................................III

B Related Products and Accessories............................................................................................................IV

B.1 General Adapters......................................................................................................................................IV

B.2 Digital I/O Application Modules.................................................................................................................IV

C Configuration Constants..............................................................................................................................V

C.1 Query Codes..............................................................................................................................................V

C.2 Error Codes...............................................................................................................................................VI

C.3 Digital I/O Return Query Codes.................................................................................................................VI

D Ordering Information...................................................................................................................................VII

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OMET-USB-73 User Manual USB Data Acquisition

List of Figures

Figure 3-1 OMET-USB-73 Front Side 2-Tier.......................................................................................3-1

Figure 3-2 OMET-USB-73 Front Side 3-Tier.......................................................................................3-1

Figure 3-3 OMET-USB-73 Rear Side 2-Tier....................................................................................... 3-1

Figure 3-4 OMET-USB-73 Rear Side 3-Tier....................................................................................... 3-1

Figure 3-5 OMET-USB-73 DB25 Male Connector................................................................................3-3

Figure 3-6 OMET-USB-73 Connectors..............................................................................................3-4

Figure 3-7 µDAQ Power Connector Pin Assignment............................................................................ 3-5

Figure 3-8 µDAQ Power Socket...................................................................................................... 3-5

Figure 3-9 OMET-PC43A2 Digital I/O Adapter....................................................................................3-6

Figure 3-10 Thermocouple Adapter.................................................................................................. 3-6

Figure 4-1 EDR Enhanced API Design .............................................................................................4-2

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OMET-USB-73 User Manual USB Data Acquisition

List of Tables

Table 1-1 µDAQ Temperature Versions............................................................................................1-3

Table 2-1 USB Operating System Support......................................................................................... 2-2

Table 3-1 µDAQ Connectors.......................................................................................................... 3-2

Table 3-2 OMET-USB-73 DIO Connector – DB25 (M)..........................................................................3-3

Table 3-3 OMET-USB-73 Input – DB25 (M).......................................................................................3-3

Table 4-1 Digital I/O Assigned Ports................................................................................................. 4-5

Table 4-2 CJC Channels Assigned ..................................................................................................4-9

Table 4-3 Thermocouple Type Table.............................................................................................. 4-10

Table 5-1 Analog Source Requirements..........................................................................................5-13

Table 5-2 General Adapters ............................................................................................................. IV

Table 5-4 Digital I/O Application Modules............................................................................................IV

Table D-1 OMET-USB-73 Ordering Information................................................................................... VII

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OMET-USB 73 User Manual Data Acquisition

1

1 Introduction

The OMET-USB-73 products consist of two main types, a ‘T’ and ‘R’ version. The ‘T’ version
is designed for reading thermocouples and the ‘R’ for reading RTDs. The main difference
between the two are the fact that the ‘T’ version can only read voltage levels between ±80mV
and the ‘R version inputs between ±2.5V.
The OMET-USB-73 Temperature Input series supports 8, 16 and 32 temperature inputs. The
units come with external adaptors that serve as the connection point for the sensors.

Each unit also has three DIO ports of eight bits.

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OMET-USB 73 User Manual Data Acquisition

1.1 Features – OMET-USB-73 Commercial Version

The OMET-USB-73 series has some very unique features and are listed below:

• USB Revision 1.1 @ full speed and 2.0 compliant @ high speed

• Powered externally

• Intel 8255 compatible digital I/O ports

• 14-bit Analog resolution temperature inputs

• Quick and effortlessly to install

• ABS plastic housing

1.2 Operating Systems and API Software

The OMET-USB-73 has a complete SDK, EDR Enhanced Software Development Kit. This kit
contains a driver for Microsoft® Windows™ and the Linux kernel. Please consult OMEGA
Engineering for the latest information on which specific operating systems are supported.

Current Supported Operating System:

• Microsoft® Windows™ 2000

• Microsoft® Windows™ Millennium Edition

• Microsoft® Windows™ XP

• Microsoft® Windows™ Pocket PC 2003

• Linux Kernel 2.4 and later

The EDR Enhanced SDK serves as a common application and programming interface for all
the units, no matter what the communications protocol. This single property makes the units
easy to program because no knowledge is needed about the specific type of interface. It also
means that the units can be controlled from the same application without any redevelopment
when installing a different device. It also increases the life expectancy of the software
application. The EDR Enhanced SDK comes with complete documentation and examples
programs. For custom software the API is easy to learn shortening the learning curve. It also
means that it’s quicker to go into production.

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OMET-USB 73 User Manual Data Acquisition

1.3 USB 73 Versions

The tables below list the various versions that are available.

1.3.1 Temperature Input Series

• R is RTD

• T is Thermocouple

Feature OMET-USB

73R/T8

Number of digital I/O channels 24 24 24
Number of 8255 compatible ports (8-bit) 3 3 3
Number of temperature channels 8 16 32
Number of CJC channels 1 2 4
Analog input resolution 14-bit 14-bit 14-bit
Maximum sampling speed 100 Hz 100 Hz 100 Hz

Table 1-1 µDAQ Temperature Versions

OMET-USB
73R/T16

OMET-USB
73R/T 32

1.4 Software Support

The OMET-USB-73 series is supported by EDR Enhanced and has an extensive range of
examples. The software will help you to get your hardware going very quickly. It also makes it
easy to develop complicated control applications. All operating system drivers, utility and test
software are supplied on the EDR Enhanced CD-Rom. The latest drivers can also be
downloaded from the Eagle Technology website. For further support information see the
Contact Details section.

1.5 Contact Details

Omega Engineering Inc.

1 Omega Drive
P.O. Box 4047
Stamford, CT 06907 USA
Telephone [phone]
Fax [phone] ­E-Mail [e-mail]
Website

http://www.omega.com

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OMET-USB 73 User Manual Data Acquisition

2

2 Getting Started

This chapter describes how to install and configure the OMET-USB-73 device for the first
time. Minimal configuration is necessary; almost all settings are done through software.

2.1 Package Items

The package of items differs by device type. Depending on the device type accessories will
be included like power supplies, USB cable and third party devices.

1. OMET-USB-73 unit

2. USB 2.0 compliant peripheral cable

3. Universal power supply

4. Software CD Rom

5. RTD or Thermocouple adaptor unit

6. Software CD Rom

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OMET-USB 73 User Manual Data Acquisition

2.2 Operating Systems for Specific Devices

The USB driver for Windows is a Windows Driver Model (WDM) type that will run on all
modern Windows platforms. Linux has it’s own driver which is exported as a character device.

Windows ME/2000/XP WDM Plug and Play
Linux 2.4 and later Linux Character Device

OS Type Driver Type

Table 2-1 USB Operating System Support

2.3 Installation

The USB installation is different on each operating system type. The installation procedure for
each operating system will be discussed separately for Windows Desktop, Windows Mobile
and Linux.

2.3.1 Microsoft Windows PnP Installation (Windows ME, 2000, XP)

For the Windows PnP installation you will need a PC that can accept a USB device and that is
configured to work with USB devices. Depending on the version you will need either USB 1.1
or USB 2.0.

Find an open USB port and connect your

device with the provide USB cable. Also

1

provide power to your device if it is

externally powered. Only use the provide

power cable or power supply.

2

3

4

5

6

7

Windows will now detect that a new USB

device was attached and request driver to

be supplied.

Click on the next button to start the

process.

The wizard will now need to be supplied

with driver files to for your USB device.

Select the option as indicated and then

the next button.

Only select to specification the location of

the driver files.

The driver is located at

<OMEGACD>\EDRE\Drivers\WDM\USB.

Select the next button to install the driver.

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OMET-USB 73 User Manual Data Acquisition

Depending on the model the last screen

8

will show that the installation was

completed successfully for your particular

device.

2.3.2 Linux Installation (Kernel 2.4 and later) - Overview

The Linux installation can be a bit tricky sometimes. Make sure that the kernel supports USB
devices and that the necessary modules are already loaded or can load on demand. Also
make sure that all kernel source and header files are installed. The Linux driver is available
with complete source and it will be best if it is recompiled to be compatible with the current
kernel version. The source listing on the <OMEGACD>\EDRE\Linux should match the
directory structure on the target system. Drivers can be copied manually to /usr/src/<linux
kernel source>/drivers/edredaq. The USB driver will also be located here. Copy the driver and
read the documentation in the same directory to install the driver.

Also copy the EDR Enhanced shared object and examples. This should be located at
/usr/src/edre. The EDRE source directory contains the source for the API and examples. The
examples directory has samples program specifically for each device. Make sure to install the
EDR Enhanced before trying to build the source code. The header files are located at
usr/include/edre. The header files is also necessary when building the drivers. Please consult
the Linux documentation for complete instructions.

2.4 Application Software- OmegaLog

The EDR Enhanced Software Development Kit CD-Rom comes with OMEGALog OMET for
Windows™. OMEGALog OMET has support for Analog Inputs, Analog Outputs, Digital I/O
and Counter-Timers. It has an oscilloscope function to continuously display incoming analog
data, a signal generator, a power supply, temperature logger and a multifunctional chart
recorder to sample and control signals, analog and digital, at preset intervals.

WaveView can be found on the EDR Enhanced CD-Rom at
<OMEGACD>\EDRE\APPS\WVFW.

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