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

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OMET-USB SERIES

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Thermocouple Measurement

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The information contained in this document is believed to be correct, but OMEGA accepts
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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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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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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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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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OMET-USB 73 User Manual Data Acquisition

3

3 Hardware Interface

The Hardware Interface chapter will discuss all connectors located on the OMET-USB-73
products. The pin assignments for each connector will also be listed.

The OMET-USB-73 series has connectors for digital I/O and temperature I/O. The OMET­USB-73s make use of only one connector type, a DB25 male. To inter-connect to application
modules there are adapters modules available. A cable is used to connect to these modules.
Screw terminal modules are also available for quick installations. This chapter will also
discuss method of hardware operation, optional accessories and connectable applicatio n
modules.

3.1 OMET-USB-73 External Application Connectors

The OMET-USB-73 is fitted with various DB25 male connectors. The illustrations below show
the different box types. There are two-tier and three-tier models. Depending on the number of
connectors required the box would be either one. The OMET-USB-73 devices use a standard
USB type B connector. The side with the power connector is the rear side of the device. The
pin assignments are the same for all models.

Figure 3-1 OMET-USB-73 Front Side

2-Tier

Figure 3-3 OMET-USB-73 Rear Side

2-Tier

Figure 3-2 OMET-USB-73 Front Side

3-Tier

Figure 3-4 OMET-USB-73 Rear Side

3-Tier

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OMET-USB 73 User Manual Data Acquisition

B = Bottom, M = Middle, T = Top

F = Front, R = Rear

Device Type DB25 (M)

OMET-USB-73T/R8
OMET-73T/R16

OMET-73T/R32

Digital I/O
Port
Assignment

FB (0-2)
FB (0-2)
FB (0-2)

DB25(M)
Analog I/O

FT (CH0-7, CJC0)
FT (CH0-7, CJC0)

RT (CH8-15, CJC1)
FM (CH0-7, CJC0)
RM (CH8-15, CJC1)
FT (CH16-23, CJC2)
RT (CH24-31, CJC3)

Table 3-1 µDAQ Connectors

Box Type

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3.2 Pin Assignments

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

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

The table below shows the pin assignments for the DB25(M) digital I/O connectors found on
the OMET-USB-73 devices.

Pin Name Pin Name

1 PA0 14 PA1
2 PA2 15 PA3
3 PA4 16 PA5
4 PA6 17 PA7
5 PB0 18 PB1
6 PB2 19 PB3
7 PB4 20 PB5
8 PB6 21 PB7
9 PC0 22 PC1
10 PC2 23 PC3
11 PC4 24 PC5
12 PC6 25 PC7
13 DGND

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

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

The table below shows the pin assignments for the DB25(M) temperature input connectors
found on the OMET-USB-73 device.

Pin Name Pin Name

1 AGND 14 +8.4V
2 AGND 15 +12V
3 AGND 16 CJC
4 AGND 17 -12V
5 AGND 18 TCH7­6 TCH7+ 19 TCH6-
7 TCH6+ 20 TCH5­8 TCH5+ 21 TCH4­9 TCH4+ 22 TCH3­10 TCH3+ 23 TCH2­11 TCH2+ 24 TCH1­12 TCH1+ 25 TCH0­13 TCH0+ 26 SHELL – DGND

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

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OMET-USB 73 User Manual Data Acquisition

3.3 Pin Descriptions

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

These lines are connected to the 3 ports of the 8255 PPI. Each port can be configured as
either an input or an output.

3.3.2 Digital Ground (DGND)

All digital ground signals should be connected to this pin.

3.3.3 Analog Ground (AGND)

All analog inputs should be referenced to AGND. Do not connect AGND and DGND together.
This will create ground loops and instability in the hardware.

3.3.4 Analog Inputs (ACH0-15)

The analog input channels are connected to the analog input sub-system and are used to
measure analog voltages. These signals are referenced to analog ground (AGND).

3.3.5 Temperature Inputs (TCH0-7)+-

Each temperature channel has two input lines for positive and negative. However in all
temperature applications there are always and external modules for thermocouple or RT D
inputs. Their user never connects directly to these pins.

3.4 Bus Connectors

The OMET-USB-73 uses a standard USB Type B connector. The device is supplied with a
USB 2.0 compliant cable. When viewing the OMET-USB-73 device from the rear the USB B
Type connector is located on the right side. In the middle are the indicator light and the power
connector on the left. When the USB device is connected to the PC the USB indicator light
will light up, indicating that USB bus power is present.

Figure 3-6 OMET-USB-73 Connectors

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OMET-USB 73 User Manual Data Acquisition

3.5 Power Supplies, Power Connectors

The commercial OMET-USB-73 units are supplied with an AC power supply.
The AC power supply is a wide AC input voltage range type, 110V to 250V. The AC power
supply also contains a universal socket kit, which makes it possible to connect to any
international power socket. The output voltage is 9V @ 1A maximum.
The polarity of the output connector must be positive on the outside and negative in the
middle.
There is an indicator light to show of the power is present.

Figure 3-7 µDAQ Power Connector Pin Assignment

Figure 3-8 µDAQ Power Socket

3.6 Application Modules & Accessories

The OMET-USB-73 devices support a wide range of standard applications modules. These
application modules can help to simply or easily duplicate installations that can save allot of
time. Application modules and accessories come in many forms. It has support for digital
output control and digital input monitoring for AC and DC.

3.6.1 Digital I/O Adapter Module – OMET-PC43A2

The digital I/O adapter module is used to map digital I/O ports to a usable form. The OMET­PC43A2 adapter module makes it possible to connect to application modules, such as solid
relays modules and optical-isolated modules. The OMET-PC43A2 output the 3 x 8-bit ports
(A,B,C) into a combination of port A and B and three separate ports A,B and C. To connect to
the OMET-PC43A2 use a standard DB25M/F cable. Port AB is a standard IDC20 connecter
and port A,B and C standard IDC10 connecters. The OMET-PC43A2 can also be used to
provide external power to application modules. Connect +5V to the external power screw
terminal and it will distribute it to all child models through the various connecters. The table
below shows the pin mappings for the module. When externally powered the power indicator
will light up.

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

3.6.2 Thermocouple Adapter

The thermocouple adapter is used to interconnect the OMET-USB-73 unit and thermocouple
temperature sensors. The adapter has cold junction compensation (CJC) built-on, which is
necessary to make thermocouple connections. The CJC needs to be calibrated before being
used. The illustration below shows the thermocouple adapter. The adapter has DB25 female
connector that connects directly to the OMET-USB-73 unit. Care must be taken to only
connect to a temperature input connector.

Figure 3-10 Thermocouple Adapter

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OMET-USB 73 User Manual Data Acquisition

4

4 Software

The OMET-USB-73 series are supplied with a complete software package called the EDR
Enhanced Software Development Kit (EDRE SDK). The SDK is supplied with many operating
system drivers, an application program interface (EDRE API), complete documentation and
programming examples for most programming languages.

The software development kit also contains OMEGALog OMET
to provide a generic application solution for data capturing and simple process control. Third
party Interface drivers are also provided for Labview, TestPoint and Agilent VEE Pro.

The Software chapter serves as reference for the EDR Enhanced API exported functions. It
explains how to do common operations to program and control the OMET-USB-73 hardware.
Each supported function is listed for each type of interface. The parameters for each function
are also listed. There are only a few functions, so make sure to have a thorough
understanding of how to use them.

4.1 EDR Enhanced Application Program Interface (EDRE API)

The EDR Enhanced API consist of operating system drivers, Windows dynamic link libraries,
Windows ActiveX controls, Windows .Net components and Linux shared objects. EDRE
Enhanced API has support for Windows 2000/XP/.Net and the Linux kernel.

The EDR Enhanced SDK contains example code to use as reference or starting point for a
custom application. The examples covers topics such as digital I/O reads and writes, and
reading the analog inputs.

The EDRE API hides the complexity of the hardware and makes it really easy to program the
OMET-USB-73 devices. It has functions for each basic sub-system and is real easy to learn.

The EDR Enhanced Application Programming Interface currently support four interface types:

1. Shared Object with exported functions via dynamic link library and shared object

2. EDR Enhanced ActiveX package for Windows platform

3. EDR Enhanced Object interface for Linux and .Net platform

4. EDR Enhanced Device Object interface for Linux and .Net platform

The illustration below shows the EDR Enhanced Application Program Interface design. The
next sections will discuss each sub-system’s functions separately. It will show which functions
each type of interface supports and what parameters are used.

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OMET-USB 73 User Manual Data Acquisition

Figure 4-1 EDR Enhanced API Design

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OMET-USB 73 User Manual Data Acquisition

4.2 The Query Command – EDRE_Query

The query API function is used to retrieve useful information about your device. Appendix C
has a list of query codes that will operate on the OMET-USB-73 devices. The query function
is the most powerful function of the EDR Enhanced API and can tell a lot about your device,
like manufacturing date, the serial number, bus type, revision and device driver version. The
query function can also supply information about the API itself like release version and
number of devices installed.

4.2.1.1 Shared Object and Linked Library Interface

Function Name
Object
Platform
Parameters

Return Error
Error Codes

EDRE_Query
Edrapi.dll / edrapi.so
Linux, Microsoft Windows, Pocket PC 2003

32-bit unsigned integer Serial Number
32-bit unsigned integer Query Code
32-bit unsigned integer Parameter

32-bit signed integer

>=0 Query return value No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-18 EDRE_BAD_QUERY Invalid query code

4.2.1.2 ActiveX Interface

Function Name
Object
Platform
Related Property
Parameters

Return Value
Error Codes

4.2.1.3 EDR Enhanced Main Object Interface

Function Name
Object
Platform
Parameters

Return Value
Error Codes

Query
EDREUTLX
Microsoft Windows
SerialNumber

32-bit unsigned integer Query Code
32-bit unsigned integer Parameter

32-bit signed long

>=0 Query return value No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial

-18 EDRE_BAD_QUERY Invalid query code

Query
EDREObject
Linux

32-bit unsigned integer Serial Number
32-bit unsigned integer Query Code
32-bit unsigned integer Parameter

32-bit signed integer

>=0 Query return value No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial

-18 EDRE_BAD_QUERY Invalid query code

number does not exist

number does not exist

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OMET-USB 73 User Manual Data Acquisition

4.2.1.4 EDR Enhanced Device Object Interface

Function Name
Object
Platform
Parameters

Return Value
Error Codes

Query
EDREDevice
Linux

32-bit unsigned integer Query Code
32-bit unsigned integer Parameter

32-bit signed integer

>=0 Query return value No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-18 EDRE_BAD_QUERY Invalid query code

4.2.1.5 Query example

This example queries the number of devices installed and the serial number of each device.

PSEUDO START

Define APINUMDEV = 5 “See appendix C for list of query codes”
NumDevices of type 32-bit integer
SerialNumber of type 32-bit integer
NumDevices = EDRE_Query(0, APINUMDEV,0)
For d = 0 to NumDevices-1 do
SerialNumber = EDRE_Query(0, APIDEVSN,d)
Next d

PSEUDO STOP

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OMET-USB 73 User Manual Data Acquisition

4.3 Digital Inputs/Outputs

The table below shows all the assigned ports to each device. The digital port makes out an
important part of any automated system. The digital I/O ports are used to control external
equipment logically or to monitor logical conditions. The digital I/O port can be used to switch
high voltage external equipment through controlling external relays and contactors. It can also
be connected external monitoring circuit that indicates conditions logically.

XXX = USB

T=TOP, M=MIDDLE, B=BOTTOM

F=FRONT, R=REAR

2 = 2 TIER BOX, 3 = 3 TIER BOX

Port PPI No

XXX 73R/T

A 0 0 8-bits FB2 Port A
B 0 1 8-bits FB2 Port B
C 0 2 8-bits FB2 Port C

Assigned

Number

Table 4-1 Digital I/O Assigned Ports

Port Width

OMET-

USB-73

Connector

Description

4.3.1 Reading the Digital Inputs – EDRE_DioRead

A single call is necessary to read a digital I/O port. Depending on the interface the result is
either passed through a reference parameter or by the returned code. The digital I/O ports a
self managed, meaning it will automatically configure as inputs when read from. Please note
that due to the identity of the digital I/O devices the output ports will looses its output value
when the a port is configured differently. It’s very important to do the appropriate reads and
writes to ensure the device is in proper configuration before using it. Each interface function is
showed separately in the next section.

4.3.1.1 Shared Object and Linked Library Interface

Function Name
Object
Platform
Parameters

Return Error
Error Codes

EDRE_DioRead
Edrapi.dll / edrapi.so
Linux, Microsoft Windows, Pocket PC 2003

32-bit unsigned integer Serial Number
32-bit unsigned integer Port
Pointer to 32-bit unsigned integer Value

32-bit signed integer

0 EDRE_OK No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Port value is incorrect

4.3.1.2 ActiveX Interface

Function Name
Object
Platform
Related Property
Parameters
Return Value

Error Codes

Read
EDREDioX
Microsoft Windows
SerialNumber

32-bit signed integer Port

32-bit signed long

>=0 Value read from port No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

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OMET-USB 73 User Manual Data Acquisition

-14 EDRE_BAD_PARAMTER Port value is incorrect

4.3.1.3 EDR Enhanced Main Object Interface

Function Name
Object
Platform
Parameters

Return Value
Error Codes

4.3.1.4 EDR Enhanced Device Object Interface

Function Name
Object
Platform
Parameters

Return Value
Error Codes

DioRead
EDREObject
Linux

32-bit unsigned integer Serial Number
32-bit unsigned integer Port
Pointer to 32-bit unsigned integer Value

32-bit signed integer

0 Value read from port No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Port value is incorrect

DioRead
EDREDevice
Linux

32-bit unsigned integer Port
Pointer to 32-bit unsigned integer Value

32-bit signed integer

0 Value read from port No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Port value is incorrect

4.3.2 Writing to the Digital Outputs – EDRE_DioWrite

A single call is necessary to write to a digital I/O port. Depending on the interface type a port
number and value is passed to the function. A returned error code will tell if the function
passed or not. . Please note that due to the identity of the digital I/O devices the output ports
will looses its output value when the a port is configured differently. It’s very important to do
the appropriate reads and writes to ensure the device is in proper configuration before using
it. Each interface function is showed separately in the next section.

4.3.2.1 Shared Object and Linked Library Interface

Function Name
Object
Platform
Parameters

Return Error
Error Codes

EDRE_DioWrite
Edrapi.dll / edrapi.so
Linux, Microsoft Windows, Pocket PC 2003

32-bit unsigned integer Serial Number
32-bit unsigned integer Port
32-bit unsigned integer Value

32-bit signed integer

0 EDRE_OK No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Either the port or
value is incorrect

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OMET-USB 73 User Manual Data Acquisition

4.3.2.2 ActiveX Interface

Function Name
Object
Platform
Related Property
Parameters

Return Value
Error Codes

Write
EDREDioX
Microsoft Windows
SerialNumber

32-bit signed integer Port
32-bit signed integer Value

32-bit signed integer

0 EDRE_OK No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Either the port or
value is incorrect

4.3.2.3 EDR Enhanced Main Object Interface

Function Name
Object
Platform
Parameters

DioWrite
EDREObject
Linux

32-bit unsigned integer Serial Number
32-bit unsigned integer Port
32-bit unsigned integer Value

Return Value
Error Codes

32-bit signed integer

0 EDRE_OK No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial
number does not exist

-14 EDRE_BAD_PARAMTER Either the port or
value is incorrect

4.3.2.4 EDR Enhanced Device Object Interface

Function Name
Object
Platform
Parameters

Return Value
Error Codes

DioWrite
EDREDevice
Linux

32-bit unsigned integer Port
32-bit unsigned integer Value

32-bit signed integer

0 EDRE_OK No error

-1 EDRE_FAIL General failure

-3 EDRE_BAD_SN Device with serial

-14 EDRE_BAD_PARAMTER Either the port or

number does not exist
value is incorrect

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OMET-USB 73 User Manual Data Acquisition

4.3.3 Query Codes

The digital I/O sub-system can be queried for the number of ports available and the property
of each port. The following query codes are relevant to the digital I/O system.

Name Value Description

DIONUMPORT 400 Query the number of digital I/O ports installed
DIOQRYPORT 401 Query a specific port for its properties. Use PARAM to specify

0 DIOOUTPUT
1 DIOINPUT
2 DIOINOROUT
3 DIOINANDOUT

DIOPORTWIDTH 402 Query a specific port width. Use PARAM to specify the port.

The value returned is the bit width of the port.

4.3.3.1 Query number of ports
PSEUDO START

Dioports of type 32-bit integer
Dioport = EDRE_Query(serialnumber, DIONUMPORT,0)

PSEUDO STOP

the port.

Port is output only

Port is either in or out

Port is input only

Port is in and out

4.3.3.2 Query port type

“Port type can be output, input, in-and-out, in-or-out

PSEUDO START

Port_type of type 32-bit integer
For p = 0 to Dioports-1 do
Port_type = EDRE_Query(serialnumber, DIOQRYPORT,p)
Next p

PSEUDO STOP

4.3.3.3 Query port width in bits
PSEUDO START

Port_width of type 32-bit integer
For p = 0 to Dioports-1 do
Port_width = EDRE_Query(serialnumber, DIOPORTWIDTH,p)
Next p

PSEUDO STOP

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OMET-USB 73 User Manual Data Acquisition

4.4 Temperature Input – 73 Model

The OMET-USB-73 has three different basic temperature models. The OMET-USB-73 is
available in an 8, 16, and 32-channel model.

There are eight channels available on a single DB25 male connector and one cold junction
compensation (CJC) channel. Only a genuine Eagle Technology thermocouple adapter can
be used to interface to the thermocouple inputs. This adapter has a build CJC device and is
necessary to read thermocouple temperatures.

The OMET-USB-73 temperature units also support RTD inputs. If RTDs are used a RTD
adapter must be connected. The RTD adapter has build in support for a 1mA and 10mA
current source. It supports both the two wire and four wire system.

Note that the OMET-USB-73 units are manufactured for either thermocouples or

RTD and cannot be changed by swapping the adapter modules.

4.4.1 Thermocouple Procedure

To read a thermocouple channel a sequence needs to be followed. The step s below shows
what steps to follow the read a thermocouple channel.

1. Read CJC channel

2. Calculate ambient temperature

3. Read thermocouple channel

4. Calculate temperature

4.4.2 Reading CJC Channel

To be able to read and calculate a thermocouple voltage the CJC channel need to be read.
This value is used to calculate the cold-junction-compensation for a thermocouple channel.
A thermocouple adapter’s CJC channel has a circuit that will supply a voltage of 10mV per 1
degree Celsius. The CJC channel is read in the same way as a normal analog channel. The
index of the channel is very important as for a unit can have more than one CJC channel. The
CJC channel must always be read before reading a number of channels on a thermocouple
adapter. The table below shows the CJC channel index for a particular type of device.

XXX = USB

Devices CJC Channels

XXX 73T8

XXX 73T16

R-XXX 73T16

XXX 73T32

R-XXX 73T32

Table 4-2 CJC Channels Assigned

4.4.2.1 Query the CJC channel index

The index of each CJC channel can be queried

PSEUDO START

CJC_channel of type 32-bit integer
Do
CJC_channel = EDRE_Query(serialnumber, ADAMBCHAN,0)
Until CJC_channel < 0

CJC Value Assigned

0 8

CJC Value Assigned

0 16
1 17

CJC Value Assigned

0 32
1 33
2 34
3 35

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OMET-USB 73 User Manual Data Acquisition

PSEUDO STOP

4.4.2.2 Read CJC channel

To read a CJC channel use the EDRE_ADSingle command. For further reference on this
command see the analog input section. The channel must be the CJC channel index. The
Gain and Range parameter are not used.

PSEUDO START

CJC_value of type 32-bit signed integer
CJC_channel of type 32-bit unsigned integer
CJC_channel = 8
error = EDRE_ADSingle(serialnumber, CJC_channel,0,0,pointer of CJC_value)
if error = 0 print CJC_value
else print “Error reading CJC channel”

PSEUDO STOP

4.4.3 Types of Thermocouples

The EDR Enhanced application program interface supports the conversion of many
thermocouple types. The table below lists all the supported types. Each type has its purpose
like wide temperature range or very accurate in a certain range. The constant value is used
when calculating the temperature.

Value Thermocouple Type

0 Type J
1 Type K
2 Type E
3 Type T
4 Type S
5 Type R
6 Type B
7 Type N
8 Type C

Table 4-3 Thermocouple Type Table

4.4.4 Reading a Thermocouple Channel

Reading the thermocouple channel is the same as reading an analog channel or CJC
channel. The channels on the OMET-USB-73models are zero indexed. If the device is a
hybrid that has normal analog channels and temperature channels, the temperat ure channels
will follow the analog channels. As with the reading of the CJC channel the rang e and gain
parameter of the EDRE_ADSingle command is not used.

The example below will read thermocouple channel 0.

PSEUDO START

TC_value of type 32-bit signed integer
error = EDRE_ADSingle(serialnumber, 0,0,0,pointer of TC_value)
if error = 0 print TC_value
else print “Error reading termocpuple channel”

PSEUDO STOP

4.4.5 Calculating Ambient Temperature

After reading the CJC channel the ambient temperature can be calculated. The voltage read
from the CJC channel must be passed to this conversion function. The returned value will be
the temperature in millidegrees.

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OMET-USB 73 User Manual Data Acquisition

4.4.5.1 Shared Object and Linked Library Interface

Function Name
Object
Platform
Parameters

Return Value
Value

4.4.5.2 ActiveX Interface

Function Name
Object
Platform
Related Property
Parameters

Return Value
Value

4.4.5.3 EDR Enhanced Main Object Interface

Function Name
Object
Platform
Parameters
Return Value

Value

EDRE_CalcCJCmC
Edrapi.dll
Microsoft Windows

32-bit signed integer CJC microvolt

32-bit signed integer
Millidegrees

CalcCJCmC
EDREADX
Microsoft Windows
None

32-bit signed integer CJC microvolt

32-bit signed integer
Millidegrees

CalcCJCmC
EDREObject
No support

32-bit signed integer CJC microvolt

32-bit signed integer
Millidegrees

4.4.5.4 EDR Enhanced Device Object Interface

Function Name
Object
Platform
Parameters
Return Value

Value

CalcCJCmC
EDREDevice
No support

32-bit signed integer CJC microvolt

32-bit signed integer
Millidegrees

4.4.6 Calculating Temperature for Thermocouples

After the CJC channel and thermocouple channel was read and the CJC value converted to
millidegrees, the thermocouple temperature can be calculated. The thermocouple type,
thermocouple channel voltage and ambient temperature need to be supplied in order to do
this. The returned value will be in millidegrees.

4.4.6.1 Shared Object and Linked Library Interface

Function Name
Object
Platform
Parameters

Return Value
Value

EDRE_CalcTCmC
Edrapi.dll
Microsoft Windows

32-bit signed integer array Thermocouple type
32-bit signed integer array Thermocouple channel

voltage

32-bit signed integer array Ambient temperature in

32-bit signed integer
Millidegrees

millidegrees

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OMET-USB 73 User Manual Data Acquisition

4.4.6.2 ActiveX Interface

Function Name
Object
Platform
Related Property
Parameters

CalcTCmC
EDREADX
Microsoft Windows
None

32-bit signed integer Thermocouple type
32-bit signed integer Thermocouple channel

voltage

32-bit signed integer Ambient temperature in

millidegrees

Return Value
Value

32-bit signed integer
Millidegrees

4.4.6.3 EDR Enhanced Main Object Interface

Function Name
Object
Platform
Parameters

CalcTCmC
EDREObject
No support

32-bit signed integer Thermocouple type
32-bit signed integer Thermocouple channel

voltage

32-bit signed integer Ambient temperature in

millidegrees

Return Value
Value

32-bit signed integer
Millidegrees

4.4.6.4 EDR Enhanced Device Object Interface

Function Name
Object
Platform
Parameters

CalcTCmC
EDREDevice
No support

32-bit signed integer Thermocouple type
32-bit signed integer Thermocouple channel

voltage

32-bit signed integer Ambient temperature in

millidegrees

Return Value
Value

32-bit signed integer
Millidegrees

4.4.6.5 Example of calculating a thermocouple temperature

The temperature

PSEUDO START

Define TYPE_K 1
CJC_millideg of type 32 signed integer
TC_value of type 32-bit signed integer
TC_millideg of type 32-bit signed integer

TC_millideg = EDRE_CalcTCmC(TYPE_K, TC_value, CJC_millideg)
Print TC_millideg

PSEUDO STOP

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OMET-USB 73 User Manual Data Acquisition

5

5 Calibration Procedure

This chapter deals with calibrating your hardware. Please follow the instruction carefully to
properly calibrate your device.

5.1.1 Calibration - USB 73

If the USB device needs to be calibrated, the software can be found on the EDR Enhanced
SDK CD-Rom. This application provides step-by-step information of how to calibrate your
device. Make sure that you have a high precision calibration voltage source. This will help to
configure your device more accurately.

5.1.2 Equipment

The following calibration equipment is required to calibrate the analog OMET-USB-73 device.
If the calibration equipment does conform to these specifications it will not be possible to
calibrate the device accurately.

5.1.2.1 High Precision Voltage Source

A high precision voltage source is required to generate input analog voltages. The Burster
Digistant Typ 4405 is am example of such a device. The device is used as standard test
equipment to calibrate the µDAQ and Rugged µDAQ device. Make sure the device conform to
its own calibration requirements and that it is serviced regularly. The device requirements are
the following.

Item Specification

Voltage Range 0V to 10V

Type Analog Output

Relative Accuracy 0.1 % of 1 bit in 16384

Accuracy

Table 5-1 Analog Source Requirements

5.1.3 Calibration Procedure – USB 73

1. Install the USB Calibration Software <EDRECD>\EDRE\APPS\OMET-USB-73 CAL

2. Run the USB Calibration Software.

3. Follow the step-by-step information on screen to tune your device.

4. Make sure to save the data to your device.

< 1.2 µV

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OMET-USB 73 User Manual Data Acquisition

±

A

A Specifications

A.1 Digital Input/Output Characteristics

Number of Digital Channels:
Models are: USB

Number of Grouped Channels:
Models are: USB

Compatibility: Intel® 82C55/TTL
D.C Characteristics – PPI 8255 Compatible Ports

Device Channels

73 24

Device PPI

Channels

73 3

Level Min Max

Input Low Voltage -0.5V 0.8V
Input High Voltage 2.0V 5.0V
Output High Voltage 2.4V
Output Low Voltage 0.45V
Output Current 2mA

A.2 Temperature Input Characteristics

Number of Channels
Models are: USB, SRL, BT and Rugged

Resolution 14-bits
Maximum Update Rate – USB 1.1 & USB 2.0 2 milliseconds
Data Transfer – USB 1.1 & USB 2.0 Programmed I/O – USB Bulk Transfer
Input Programmable Ranges

Input Coupling DC

Relative Accuracy

Gain x 1 Offset Error

Gain x 30 Offset Error

1 LSB

±0.305 millivolts
±0.011 millivolts

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Device Differential

73T8 8
73T16 16
73T32 32

Channel

Gain

1 R

30 T

Channels

Model Bipolar

Range

±2.5V

±83mV

OMET-USB 73 User Manual Data Acquisition

A.3 Bus Interface

A.3.1 USB 1.1

Bus Type Universal Serial Bus Revision 1.1
Bus Speed USB Full Speed – 12 Mega bit per second.
Controller USB Serial Interface Endpoint Compliant
Voltage 5V
Endpoints 1 x Control Transfer Endpoint

A.3.2 USB 2.0

Bus Type Universal Serial Bus Revision 2.0
Bus Speed USB High Speed – 480 Mega bit per second.
Controller USB Serial Interface Endpoint Compliant
Voltage 5V
Endpoints 1 x Control Transfer Endpoint

1 x Bulk Transfer Endpoint
1 x Interrupt Transfer Endpoint
1 x Isochronous Transfer Endpoint @ 512kB/s

1 x Bulk Transfer Endpoint
1 x Interrupt Transfer Endpoint
1 x Isochronous Transfer Endpoint @ 512kB/s

A.4 Power Requirements

A.4.1 USB Devices

Device Minimum Typical Maximum Power Source
OMET-USB-73T8 400 mA 450 mA External PSU
OMET-USB-73T16 420 mA 470 mA External PSU
OMET-USB-73T32 820 mA 870 mA External PSU

A.5 Environmental / Physical

A.5.1 USB

Relative Humidity 0% to 90% (non-condensing)
Operating Temperature
Storage Temperature
Housing Type Plastic Casing
Weight – OMET-USB-73T8, OMET-USB-73T16 280g
Weight – OMET-USB73-T32 400g
Dimensions – OMET-USB73-T8, OMET-USB-73T16 Height: 45mm

Dimensions – OMET-USB-73T32 Height: 60mm

0°C to 70°C

-25°C to 120°C

Width: 80mm
Length: 148mm

Width: 80mm
Length: 148mm

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A.6 Power Supplies

Input Type AC
Input Range 110V – 240V
Input Connector Type Multiple to comply with all international wall sockets
Power DC
Output Type DC
Output Voltage 9V
Maximum Output Current 1A
Output Connector Type 5mm DC plug
Regulator Type Switch Mode
Location External/Separate
Indicators Power

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OMET-USB 73 User Manual Data Acquisition

B

B Related Products and Accessories

A whole range of external connectable accessories and application modules supports the
OMET-USB-73 series. These modules are easy to connect too and support DINRAIL
installations. Below is a list of products that are compatible with the OMET-USB-73 devices.
They are broken up sub-sections to cover each type of application.

B.1 General Adapters

There are general adapters that can be used with the OMET-USB-73 devices. These
modules simple map a cable-connector to a screw terminal block.

Adapter Entry

OMET-

ADPT-2526

OMET-

ADPT-20

OMET-

ADPT-910

Connector

DB25 Female DB25M/F To map the main connector to a screw terminal

IDC 20 IDC 20 To connect to digital I/O port A-B on the OMET-

IDC 10

DB9 Female

Cable Possible

clock. This adapter is used to make simple

connections to the unit.

IDC 10

DB9 Female

Table 5-2 General Adapters

To connect 8 channels on the PC52A2

For connecting to digital I/O ports or analog

channels on the OMET-PC43A2 and PC52A2.

Also for connecting to the DB9 on the serial

Usage

PC43A2.

units.

B.2 Digital I/O Application Modules

All Digital I/O application modules are DINRAIL mountable. They are supplied with standard
cables and are easy to connect too. Wide variety is available and care must be taken to select
the correct module for the application.

Adapter Entry

Connector

PC-37 Series IDC10

IDC20

DB25
PC-51-8 IDC10 IDC10 8CH Opto 22 G4 Carrier module
PC-38G IDC10 IDC10 8CH Electro-Mechanical relay module
PC-38H IDC10 IDC10 8CH Reed relay module
PC-38V IDC10 IDC10 8CH TTL Driver module
PC-38W IDC20 IDC20 16CH TTL Driver module
PC-38X DB25 DB25M/F 24CH TTL Driver module
PC-43B IDC20 IDC20 16CH Opto-Isolated inputs
PC-43C DB25 DB25F/M 24CH Opto-Isolated inputs
PC-43E IDC10 IDC10 8CH Opto-Isolated inputs

Cable Application

IDC10
IDC20

DB25M/F

Opto 22 solid state relay modules

Table 5-3 Digital I/O Application Modules

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C

C Configuration Constants

C.1 Query Codes

Name Value Description

APIMAJOR 1 Query EDRE API major version number.
APIMINOR 2 Query EDRE API minor version number.
APIBUILD 3 Query EDRE API build version number.
APIOS 4 Query EDRE API OS type.
APINUMDEV 5 Query number of devices installed.
BRDTYPE 10 Query a board’s type.
BRDREV 11 Query a board’s revision.
BRDYEAR 12 Query a board’s manufactured year.
BRDMONTH 13 Query a board’s manufactured month.
BRDDAY 14 Query a board’s manufactured da y.
BRDSERIALNO 15 Query a board’s serial number.
DRVMAJOR 20 Query a driver’s major version number.
DRVMINOR 21 Query a driver’s minor version number.
DRVBUILD 22 Query a driver’s build version number.
ADNUMCHAN 100 Query number of ADC channel.
ADNUMSH 101 Query number of samples-and-hold channels.
ADMAXFREQ 102 Query maximum sampling frequency.
ADBUSY 103 Check if ADC system is busy.
ADFIFOSIZE 104 Get ADC hardware FIFO size.
ADFIFOOVER 105 Check for FIFO overrun condition.
ADBUFFSIZE 106 Check software buffer size.
ADBUFFOVER 107 Check for circular buffer overrun.
ADBUFFALLOC 108 Check if software buffer is allocated.
ADUNREAD 109 Get number of samples available.
ADEXTCLK 110 Get status of external clock line – PCI30FG.
ADEXTTRIG 111 Get status of external trigger line – PCI30FG.
ADBURST 112 Check if burst mode is enabled.
ADRANGE 113 Get ADC range.
DANUMCHAN 200 Query number of DAC channels.
DAMAXFREQ 201 Query maximum DAC output frequency.
DABUSY 202 Check if DAC system is busy.
DAFIFOSZ 203 Get DAC FIFO size.
CTNUM 300 Query number of counter-timer channels.
CTBUSY 301 Check if counter-timer system is busy.
DIONUMPORT 400 Query number of digital I/O ports.
DIOQRYPORT 401 Query a specific port for capabilities.
DIOPORTWIDTH 402 Get a specific port’s width.
INTNUMSRC 500 Query number of interrupts sources.
INTSTATUS 501 Queries interrupt system’s status.
INTBUSCONNECT 502 Connect interrupt system to bus.
INTISAVAILABLE 503 Check if an interrupt is available.
INTNUMTRIG 504 Check number times interrupted

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OMET-USB 73 User Manual Data Acquisition

C.2 Error Codes

Name Value Description

EDRE_OK 0 Function successfully.
EDRE_FAIL -1 Function call failed.
EDRE_BAD_FN -2 Invalid function call.
EDRE_BAD_SN -3 Invalid serial number.
EDRE_BAD_DEVICE -4 Invalid device.
EDRE_BAD_OS -5 Function not supported by operating system.
EDRE_EVENT_FAILED -6 Wait on event failed.
EDRE_EVENT_TIMEOUT -7 Event timed out.
EDRE_INT_SET -8 Interrupt in use.
EDRE_DA_BAD_RANGE -9 DAC value out of range.
EDRE_AD_BAD_CHANLIST -10 Channel list size out of range.
EDRE_BAD_FREQUECY -11 Frequency out of range.
EDRE_BAD_BUFFER_SIZE -12 Data passed by buffer incorrectly sized
EDRE_BAD_PORT -13 Port value out of range.
EDRE_BAD_PARAMETER -14 Invalid parameter value specified.
EDRE_BUSY -15 System busy.
EDRE_IO_FAIL -16 IO call failed.
EDRE_BAD_ADGAIN -17 ADC-gain out of range.
EDRE_BAD_QUERY -18 Query value not supported.
EDRE_BAD_CHAN -19 Channel number out of range.
EDRE_BAD_VALUE -20 Configuration value specified out of range.
EDRE_BAD_CT -21 Counter-timer channel out of range.
EDRE_BAD_CHANLIST -22 Channel list invalid.
EDRE_BAD_CONFIG -23 Configuration invalid.
EDRE_BAD_MODE -24 Mode not valid.
EDRE_HW_ERROR -25 Hardware error occurred.
EDRE_HW_BUSY -26 Hardware busy.
EDRE_BAD_BUFFER -27 Buffer invalid.
EDRE_REG_ERROR -28 Registry error occurred.
EDRE_OUT_RES -29 Out of resources.
EDRE_IO_PENDING -30 Waiting on I/O completion

C.3 Digital I/O Return Query Codes

Name Value Description

DIOOUT 0 Port is an output.
DIOIN 1 Port is an input.
DIOINOROUT 2 Port can be configured as in or out.
DIOINANDOUT 3 Port is an input and an output.

Omega Engineering Inc. © Copyright 2005 – www.omega.com VI

OMET-USB 73 User Manual Data Acquisition

D

D Ordering Information

For ordering information please contact Omega Engineering directly or visit our website

www.omega.com.

Device USB

OMET-73T8
OMET-73T16
OMET-73T32
OMET-73R8
OMET-73R16
OMET-73R32

USB

1.1

3 3
3 3
3 3
3 3
3 3
3 3

Description

2.0

8 Channel Thermocouple input device
16 Channel Thermocouple input device
32 Channel Thermocouple input device
8 Channel RTD input device
16 Channel RTD input device
32 Channel RTD input device

Table D-1 OMET-USB-73 Ordering Information

Omega Engineering © Copyright 2002-2004 – www.omega.com

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

FOR W

ARRANTY RETURNS, please have the

following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which the product
was PURCHASED,

2. Model and serial number of the product under
warranty, and

3. Repair instructions and/or specific problems
relative to the product.

FOR NON-WARRANTY REPAIRS,

consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

M4248/1005

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

TEMPERATURE

䡺⻬

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

䡺⻬

Wire: Thermocouple, RTD & Thermistor

䡺⻬

Calibrators & Ice Point References

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Recorders, Controllers & Process Monitors

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Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

䡺⻬

Transducers & Strain Gages

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Load Cells & Pressure Gages

䡺⻬

Displacement Transducers

䡺⻬

Instrumentation & Accessories

FLOW/LEVEL

䡺⻬

Rotameters, Gas Mass Flowmeters & Flow Computers

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Air Velocity Indicators

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Turbine/Paddlewheel Systems

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Totalizers & Batch Controllers

pH/CONDUCTIVITY

䡺⻬

pH Electrodes, Testers & Accessories

䡺⻬

Benchtop/Laboratory Meters

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Controllers, Calibrators, Simulators & Pumps

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Industrial pH & Conductivity Equipment

DATA ACQUISITION

䡺⻬

Data Acquisition & Engineering Software

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Communications-Based Acquisition Systems

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Plug-in Cards for Apple, IBM & Compatibles

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Datalogging Systems

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Recorders, Printers & Plotters

HEATERS

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Heating Cable

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Cartridge & Strip Heaters

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Immersion & Band Heaters

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Flexible Heaters

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Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

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Metering & Control Instrumentation

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Refractometers

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Pumps & Tubing

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Air, Soil & Water Monitors

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Industrial Water & Wastewater Treatment

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pH, Conductivity & Dissolved Oxygen Instruments