Omega Products USB-4718 Installation Manual

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User’s Guide

USB-4718

8 Channel Thermocouple Input

USB Data Acquisition Module

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USB-4718

8-Channel Thermocouple
Input Data Acquisition Module

User Manual

Contents

Chapter 1 Introduction ..................................................... 2

1.1 Features ............................................................................. 2

1.2 Applications ...................................................................... 3

1.3 Installation Guide .............................................................. 3

Figure 1.1:Installation Flow Chart ................................. 4

1.4 Software Overview............................................................ 5

1.4.1 Programming Cho ic es for DA& C Module: ................... 5

1.4.2 Device Drivers ............................................................... 5

1.5 Device Driver Programming Roadmap ............................. 6

1.5.1 Programming Tools ....................................................... 6

1.5.2 Programming with Device Drivers Function Library .... 7

1.5.3 Troubleshooting Device Drivers Error .......................... 7

Chapter 2 Installation ..................................................... 10

2.1 Unpacking ....................................................................... 10

2.2 Driver Installation ........................................................... 10

Figure 2.1:Automation Software Setup Screen ........... 11

2.3 Hardware Installation ...................................................... 12

Figure 2 .2:Device M an ager Screen ................. ............ 1 3

Figure 2.3:USB-4718 Device Speed ............................ 14

2.4 Device Setup & Configuration ........................................ 14

2.4.1 Setting Up the Device .............................................. .... 15

Figure 2.4:Device Manager Dialog Box ...................... 15

2.4.2 Configuring the Device .............................................. .. 15

Figure 2.5:The Device Setting Dialog Box ................. 16

2.5 Device Testing............................ ... ..... ... ...... ..... ...... ...... ... 16

2.5.1 Testing Analog Input Function .................................... 17

Figure 2.6:Analog Input Tab/Device Test Dialog ....... 17

2.5.2 Testing Analog Output Function ................................. 17

Figure 2.7:Analog Output Function Not Supported .... 17

2.5.3 Testing Digital Input Function ..................................... 18

Figure 2.8:Digital Input Tab/Device Test Dialog ........ 18

2.5.4 Testing Digital Output Function .................................. 18

Figure 2.9:Digital Output Tab/Device Test Dialog ..... 18

2.5.5 Testing Counter Function ............................................ 19

Figure 2.10:Counter Tab Testing Unsupported ........... 19

2.6 Hardware Uninstallation ................................................. 19

Figure 2.11:Unplug or Eject Hardware Dialog ............ 20

Figure 2.12:Stop a Hardware device dialog box .......... 20

Chapter 3 Signal Connections ........................................ 22

3.1 Overview ......................................................................... 22

3.2 I/O Connectors ................................................................ 22

3.2.1 Pin Assignment ............................................................ 22

v Table of Contents

Figure 3.1:I/O Connector Pin Assignment .................. 23

3.2.2 I/O Connector Signal Description ................................ 24

Table 3.1:I/O Connector Signal Description ............... 24

3.2.3 LED Indicator Status Descript ion ................................ 24

Table 3.2:LED Indicator Status Description ................ 24

3.3 Analog Input Connections............................................... 25

Figure 3.2:Single-Ended Input Ch a n nel Connection ... 25

3.4 Isolated Digital Input Connections.................................. 25

Figure 3.3:Analog Output Chann e l Connections ......... 26

3.5 Isolated Digital Output Connections ............................... 26

3.5.1 External Trigger Source Connection ........................... 26

3.6 Field Wiring Considerations ........................................... 27

Appendix A Specifications ................................................. 30

A.1 Analog Input.................................................................... 30

A.2 Accuracy for Thermocouple: .......................................... 31

A.3 Isolated Digital Input....................................................... 31

A.4 Isolated Digital Output .................................................... 32

A.5 General ............................................................................ 32

Table A.1:Analog Input ............................................... 30

Table A.2:Accuracy for Thermocouple ....................... 31

Table A.3:Isolated Digital Input .................................. 31

Table A.4:Isolated Digital Output ............................... 32

Table A.5:General ........................................................ 32

Appendix B Function Block............................................... 34

Appendix C Firmware Download Utility ......................... 36

Figure C.1:Install Firmware Downloa d Utili ty Sc ree n 36

Figure C.2:USB Download Utility .............................. 37

Figure C.3:Firmw a re Selection ........................... ......... 37

Figure C.4:Firmware Down loa d C o mpleted. ............... 38

Appendix D Analog Input Calibration ............................. 43

Calibration................................................ 44

D.1 Voltage Input

Figure D.1:USB-4718 Device Setting window .......... 45

Figure D.2:USB-4718 Calibration Wizard 46

Figure D.3:Zero range calibration complete. ............... 46

Figure D.4:Full range calibration ................... ............. 47

Figure D.5: Calibration Complete ............................ ... 47

D.2 Voltage Input Calibration................................................ 48

Figure D.6:Select the current input range setting ........ 48

USB-4718 User Manual vi

1

2

Introduction

This chapter will provide information
on the features of the
quick start
some brief information on software and
accessories for the USB-4718
Sections include:

• Features

• Applications

• Installation Guide

• Software Overview

• Device Driver

• Programming Roadmap

DAS module, a

guide for installation, and

Module.

Chapter 1 Introduction

USB-4718 offers 8 thermocouple inputs with 16-bit resolution, up to

0.1% input range accuracy, or 4~20 mA inputs. Reliable and rugged
enough

for industrial applications, yet inexpensive enough for home
projects, USB-4718
capability to

is

the perfect way to add measurement and control

any USB capable computer. The USB-4718 is fully USB
plug and play and easy to use. It obtains all required power from the USB
port, so no external

power connection is ever required.

1.1 Features

USB-4718 has the most requested measurement & control functions:

• 8 differential thermocouple input channels

• 16 bits resolution

• Software configurable for thermocouple, low level voltage or

current inputs.

• Wiring burned-out detectable function (Thermo mode)

• 2,500 Vdc isolation

• Watchdog Timer

• Supports 0~20 & 4~20mA current inputs.

• Bus-powered

• Device status LED indicator

• Removable on-module wiring terminal

• USB 2.0 Support

• Hot swappable

Note: For detailed specifications of USB-4718, please

refer

to Appendix A, Specifications.

1.2 Applications

• Temperature measurement

• Industrial ON/OFF control

• Industrial and Lab. automation

USB-4718 User Manual 2

1.3 Installation Guide

Before you install your USB-4718 module, please make sure you have
the following necessary

• USB-4718 DAS Module

• Shielded USB 2.0 cable (1.8 m)

• Driver software DLL drivers (included in the companion

CD-ROM)

.

After you have the necessary components and maybe some accessories
for enhanced

operation of your USB DAS module, you can then begin the
installation procedure. Figure
flow chart
tion procedures.

to give a broad picture of the software and hardware installa-

components:

1.1 on the next page provides a concise

3 Chapter 1

Figure 1.1: Installation Flow Chart

USB-4718 User Manual 4

1.4 Software Overview

Omega offers a rich set of DLL drivers, third-party driver support and
application software
module:

• Device Drivers (on the companion CD-ROM)

to help fully exploit the functions of your USB-4718

1.4.1 Programming Choices for DA&C Module:

You may use the application software like the Device Drivers. On the
other hand, advanced
programming
to its laborious and time-consuming

as another option, although this is not recommended due

users are allowed to use register- level

nature.

1.4.2 Device Drivers

The Device Drivers software is included on the companion CD-ROM.

Device Drivers features a complete I/O function library to help boost

the
your application performance. The
works seamlessly with development tools such as Visual C++, Visual
Basic

Device Drivers for Windows 2000/XP

5 Chapter 1

1.5 Device Driver Programming Roadmap

This section will provide a roadmap to demonstrate how to build an appli­cation

from scratch using the Device Drivers with your favorite
development
instructions on
development tool will be given
a rich

1.5.1 Programming Tools

Programmers can develop application programs with the following devel­opment tools:

• Visual C++

• Visual Basic
For instructions on how to begin programming in each development tool,

a

Tutorial Chapter is included in the Device Drivers Manual for your
reference. Please
Device
look at the example source code provided for each programming tool,
since they

The Device Drivers Manual can be found on the companion CD-ROM.
Alternatively, if
system, The
Start button:

Start/Programs/Omega USB-4700 series/Device Driver’s Manual

The example source code can be found under the corresponding installa-

folder such as the default installation path:

tion

Pr o g r a m F i l e s /Omega/USB-4700/Examples

For information about using other function groups or other development
tools, please refer to

Device Drivers

Drivers Manual.

USB-4718 User Manual 6

tools such as Vi sual C++, Visual Basic. The step-by-step

how to build your own applications using each

in the Device Drivers Manual. Moreover,

set of example source code is also given for your reference.

refer to the corresponding sections in this chapter on the

Drivers Manual to begin your programming efforts. You can also

can get you very well oriented.

you have already installed the Device Drivers on your

Device Drivers Manual can be readily accessed through the

Creating Windows 2000/XP Applications with

chapter and the Function Overview

chapter in the Device

1.5.2 Programming with Device Drivers Function Library

The

Device Drivers offer a rich function library that can be utilized in
various application programs.
APIs that
Basic.

support many development tools, such as Vi sual C++, Visual

This function library consists of numerous

1.5.3 Troubleshooting Device Drivers Error

Driver functions will return a status code when they are called to perform a
certain task for the application. When a function returns a
zero, it

means the function has failed to perform its designated function.
To troubleshoot the Device
DRV_GetErrorMessage function to return the error message.
Alternatively,
in the Device
IDs and the Error

you can refer to the Device Drivers Error Codes Appendix

Drivers Manual for a detailed listing of Error Codes, Error

Messages.

Drivers error, you can pass the error code to

7 Chapter 1

code that is not

USB-4718 User Manual 8

2

2

Installation

This chapter has a package item check­list,

proper instructions about unpack­ing and step-by-step procedures
both

driver and USB installation..

Sections include:

• Unpacking

• Driver Installation

• Hardware Installation

• Device Setup & Configuration

• Device T e sting

• Hardware Uninstallation

for

Chapter 2 Installation

2.1 Unpacking

After receiving your USB-4718 package, please inspect its contents first.
The

package should contain the following items:

• USB-4718 Module

• Shielded USB 2.0 Cable (1.8 m)

• Companion CD-ROM (DLL driver included)

The USB-4718 Module harbors certain electronic components vulnerable
to

electrostatic discharge (ESD). ESD could easily damage the integrated

circuits and certain components
paid attent ion to.

bag, you should take followi ng precautions
damage:

• Touch the metal part of your computer chassis with your hand to dis-

• Make contact between the antistatic bag and ground before op ening the

static electricity accumulated on your body. One can also use a

charge
grounding strap.

bag.

if preventive measures are not carefully

Before removing the module from the antistatic plast ic

After taking out the module, you should first:

Inspect the module for any possible signs of external damage (loose or
damaged components,
notify

our service department or our local sales representative immedi-

ately. Avoid using

• Avoid physical contact with materials that could hold static
electricity such

USB-4718 User Manual 10

etc.). If the module is visibly damaged, please

a damaged module with your system.

as

plastic, vinyl and Styrofoam.

to ward off possible ESD

2.2 Driver Installation

We recommend you install the software driver before you install the
USB-4718 module into your system, since
installation process.

The 32-bit DLL driver Setup program for the USB-4718 module is
included
package. Please

on

the companion CD-ROM that is shipped with your module

follow the steps below to install the driver software:

Step 1:

Insert the companion CD-ROM into your CD-ROM drive.

Step 2:

The Setup program will be launched automatically if you have the

auto-play

function enabled on your system.

.

Note:

If the auto-play f un ction is not enabled on your

computer, use Windows
command to execute Setu p .e xe
CD-ROM.

Step3:

Click Continue

, and select the Installation

11 Chapter 2

this will guarantee a smooth

Explorer or Windows Run

on the companion

option

Step4:

Select the specific device and then just follow the installation
instructions step by step to complete your device
setup.

driver installation and

For further information on driver-related issues, an online version of the
Device Drivers Manual is

Start/Programs/Omega USB-4700 series/Device Driver’s

available by accessing the following path:

Manual

2.3 Hardware Installation

Note: Make sure you have insta lle d th e so ftware driver

before you install
Section 2.2 Driver Installation )

the module (please refer to

After the DLL driver installation is completed, you can now go on to
install

the USB-4718 module in any USB port that supports the USB

1.1/2.0 standard,
computer’s user manual or
Please follow

on

your computer. It is suggested that you refer to the

related documentation if you have any doubts.

the steps below to install the module on your system.

Step 1: Touch the metal part on the surface of your computer to neutralize

the static electricity that

might be in your body.

Step 2: Plug your USB module into the selected USB port. Hold the mod-

ule only by its edges
force

must be avoided; otherwise the module might get damaged.

Plug the module firmly into place. Use of excessive

Note:

In case you installed the module without installing

the DLL driver first,
nize your
reboot, and

module as an “unknown d evice” after

Windows 2000/XP will recog-

will prompt you to provide necessary
driver. You sho uld ignore the prompt ing me ssages
(just click the Cancel butto n ) an d se t up the drive r
according to the steps described
Driver Installation.

in Section 2.2

USB-4718 User Manual 12

Figure 2.2: Device Manager Screen

Note:

If your module is proper ly inst a lled, yo u shou ld

see the device name of your module listed on the
Device

Manager tab. If you see your d evice name

listed, but

marked with an exclamation sign “!”
(Fig. 2-4), it means your module has not bee n
correctly insta lled. In
ule from Device Mana ger
name and

press the Remove

through the driver

this case, remove the mod-

by

selecting its device

button. Then go

installation process again.

You can check the Device Properties to see if your device is running
under "Full
See figure 2.3 on

Speed" mode (USB 1.1) or "High Speed" mode (USB 2.0).

the next page.

13 Chapter 2

Figure 2.3: USB-4718 Device Speed

After your module is properly installed with your system, you can now
configure your device
been installed

on

installation procedure should include

testing

. The following sections will guide you through the Setup,

Configuration and Testing of your device.

using the

Device Manager that has itself already

your system during driver setup. A complete device

device setup,

configuration and

2.4 Device Setup & Configuration

Device Manager is a utility that allows you to set up, configure and test

your devices, and later stores your settings in the
settings
32-bit DLL drivers.

will be used when you call the APIs of the

USB-4718 User Manual 14

system registry. These

2.4.1 Setting Up the Device

Ste p 1: To complete the device setup and configuration procedures, you

must first install the
vious section of Chapter 2 for detailed installation instructions).

Step2:

You can view the device(s) already installed on your system (if

any)

in

the Installed Devices list box. If you haven’t installed any devices,

you

might see a blank list.

device along with its driver. (Please refer to the pre-

Figure 2.4: Device Manager Dialog Box

Note:

If you have properly installed the device driver but still

can’t find it
Device Manager and re start it.

in

Device Manager, please close the

2.4.2 Configuring the Device

Step 3: Click “

as follow. On the Device Setting dialog box, you can specify the

box
BoardID
channels. "Locate"
tom

so you can easily identify the device you are operating.

Setup

” button and you will see the “

of the device and perform the AI calibration function for the AI

will blink the on-module LED till you release the bot-

15 Chapter 2

Device Setting

“dialog

"Restore" will reset device configurations to the factory settings.

Note: Please refer to Appendix C for a detail ed calibration

procedure.

Figure 2.5: The Device Setting Dialog Box

1.

Board ID: Set the Board ID for easy identification.

2.

Locate: The on-module LED indicator blinks when you continually

Locate

press “

3.

Label string: Edit the string label for identification purpose.

” button.

USB-4718 User Manual 16

4.

AI Channel setting: Set the thermocouple type/ analog input range for

each AI

5.
rate

6.
default.

channel.

Sample Rate adjustment: Drag the slide bar to adjust the sampling

of your device.

Restore: Restore the AI Calibration setting or the CJC offset setting to

7.

CJC Offset: Adjust CJC offset setting.

(Restore Setting. Tif)

8.

AI Calibration: Analog input channel calibration function. Please refer

Appendix D for detailed operating guide.

to

2.4.3 Gain Code Setting

Configure the AI (analog input) channel's input voltage/current range by
setting the
voltage and current is
of current
software manual for more detail

corresponding GainCode

GainCode

(CJC Offset Adjustment. Tif)

of the device. The configuration for

differentiated by the value of GainCode.

The value

is greater than 0x8000. Please refer to USB-4718’s

information.

17 Chapter 2

Table 2.1: Gain Code

Gain Code (Hex) Type Range
0x08 Voltage 0-15mV

0x0A Voltage 0-50mV
0x0B Voltage 0-100mV
0x0D Voltage 0-500mV
0x0E Voltage 0-1.0V
0x0F Voltage 0-2.5V
0x8000 Current 0-20mA
0x8001 Current 4-20mA

2.5 Device Testing

Following the Setup and Configuration procedures to the last step
described in
by clicking the
In the
USB-4718 on the

put

or

2.5.1 Testing Analog Input Function

Click the Analog Input tab to bring it up to front of the screen. Select the
input range
ure the sampling rate on the
up/down arrow.

USB-4718 User Manual 18

the previous section, you can now proceed to test the device

Test Button in the I/O Device Installation

Device T es t dialog window, you are free to test various functions of

Analog input, Analog output, Digital input, Digital out-

Counter tabs.

dialog window.

for each channel in the Input range drop-down boxes. Config-

scroll bar. Switch the channels by using the

2.5.2 Testing Analog Output Function

Figure 2.6: Analog Input Tab/Device Test Dialog

Unsupported on this module.

Figure 2.7: Analog Output Functio n Not Supported

19 Chapter 2

2.5.3 Testing Digital Input Function

Click the Digital Input tab to show the Digital Input test panel as seen
below. By the
tus of each digital input channel is high or low.

color of the LEDs, you can easily discern whether the sta-

Red

lamp: High

Green

lamp: Low

2.5.4 Testing Digital Output Function

Figure 2.8: Digital Input Tab/Device Test Dialog

Click the Digital Output tab to bring up the Digital Output test panel as
shown below. By pressing the buttons on each tab, you can easily set each
digital output

channel as high or low for the corresponding port.

Figure 2.9: Digital O utput Tab/Device Test Dialog

USB-4718 User Manual 20

2.5.5 Testing Counter Function

Unsupported on this module.

Only after your module device is properly set up, configured and
tested, can
After the device installation procedure is
proceed

the device installation procedure be considered complete.

to the next chapter

, Signal Connections.

completed, you can safely

2.6 Hardware Uninstallation

Though the USB modules are hot swappable, we still recommend you to
follow the hardware un-installation
damages

to your device or your system.

procedure to avoid any unpredictable

Step1:

Close the applications of the USB module (ex. Device

Manager).

Step2:

Right click the “Unplug or Eject Hardware” icon on your task bar.

21 Chapter 2

Figure 2.11: Unplug or Eject Hardware Dialog

Step3:

Select “USB4718 Device” and press “Stop” Button.

Figure 2.12: Stop a Hardware device dialog box

Step4:

Unplug your USB device from the USB port.

Note: Please make sure that you have closed the appli-

cation programs

before unplugging the USB
device, otherwise some un expe cted system erro r s
or

damages may hap pe n.

USB-4718 User Manual 22

3

2

Signal Connections

This chapter provides useful informa­tion on how to connect input and output
signals to the
connectors..

Sections include:

• Overview

• I/O Connectors

• Analog Input Connections

• Analog Output Connections

• Trigger Source Connections

• Field Wiring Considerations

USB-4718 via the I/O

Chapter 3 Signal Connect ions

3.1 Overview

Maintaining good signal connections is one of the most important factors
in ensuring that your application
correctly. A good signal
damage to your PC

connection can avoid unnecessary and costly

and other hardware devices.

3.2 I/O Connectors

USB-4718 is equipped with plug-in screw-terminal connectors that facili­tate connection

3.2.1 Pin Assignment

Figure 3.1 on next page shows the pin assignments for the five 10-pin I/O
connectors on USB-4718.

USB-4718 User Manual 24

to

the module without terminal boards or cables.

system is sending and receiving data

Figure 3.1: I/O Connector Pin Assignment

25 Chapter 3

3.2.2 I/O Connector Signal Description

Table 3.1: I/O Connector Signal Description

Signal
Name

IDI<0~7> ICOM Input Isolated Digital Input Channels
ICOM -- -- Common Port of IDI Channels
IDO<0~7> OCOM Output Isolated Digital Output Channels
OGND -- -- Isolated Digital Output Ground
OCOM -- -- Positive External Power Supply
AI<0~7> -- Input Analog Input Channels
CJC+/CJC- -- -- Cold Junction Compensation

NC -- -- No connected

Reference Direction Description

3.2.3 LED Indicator Status Description

The USB Module is equipped with a LED indicator to show the current
status

of

the device. When you plug the USB device into the USB port,
the LED
is on.
information.

indicator will blink five times and then stay lit to indicate that it

Please refer to the following table for detailed LED indicator status

Table 3.2: LED Indicator St atus Descriptio n

LED Status Description
ON Device ready for work

Off Device not ready to work
Slow Blinking (5 times) Device Initialization
Fast Blinking

(Depends on data transfer speed).

Device working

USB-4718 User Manual 26

3.2.4 Jumper Setting Description

Table 3.3: Jumper Setting Description

Jumper Description Jumper Description
JP1

JP2

JP3

JP4

JP5

Input mode set­ting for analog
input ch0

Input mode set­ting for analog

input ch4
Input mode set-

ting for analog
input ch1

Input mode set­ting for analog

input ch5
Input mode set-

ting for analog
input ch2

JP6

JP7

JP8

JP13

Input mode setting for analog
input ch6

Input mode setting for analog
input ch3

Input mode setting for analog
input ch7

Watchdog timer setting

JP1~JP8: Input Mode Setting for Analog Input Channels

The analog input mode of every AI channel on USB-4718 can be set by
JP1~JP8 separately to measure
Inappropriate setting of
malfunction of

USB-4718.

the voltage sources or the current sources.

the jumpers can cause unpredictable errors or

Jumper
Setting

Description

Set the channel to voltage
input mode (Default setting)

Set the channel to
current input mode

27 Chapter 3

JP13: Watchdog Timer Setting

The watchdog timer supervisory function will automatically reset USB­4718 in the event of system failure. JP13 on USB-4718 can enable/dis­able watchdog timer

function or reset module manually.

Jumper
Setting

Description

Enable watchdog timer
function (Default setting)

Disable watchdog timer
function

How to Reset USB-4718 Manually

Plug the jumper to JP13 pin2-3 and then remove it, USB-4718 will reset.

NOTE:

reset.

Users may restart the application programs after USB-4718 is

USB-4718 User Manual 28

3.3 Analog Input Connections

The differential input channels operate with two signal wires for each
channel, and the
sured. There are 8 analog

voltage difference between both signal wires is mea-

input channels available on USB-4718

Figure 3.2: Differential Input Channel Connection

3.4 Isolated Digital Input Connections

USB-4718 has 8 isolated digital input channels designated IDI0~IDI7.
Each of isolated
and accept bi-directional input. It means that
negative voltage to an
one common
source to one

digital input channel accepts 5~30 VDC voltage inputs,

you can apply positive or

isolated input pin (IDI). All 8 input channels share

pin. Figure 3-3 shows how to connect an external input

of the module’s isolated input channels

29 Chapter 3

Figure 3.3: Digital Input Channel Connections

3.5 Isolated Digital Output Connections

USB-4718 has 8 isolated digital output channels designated IDO0~IDO7.
Each of isolated
sistor. All 8 output
pression
external output load to the module’s isolated

Note:

If an external voltage (5 ~ 30 VDC) is applied to an isolated output
channel while it is being used as an output channel, the current will
flow from
the current through each

USB-4718 User Manual 30

output channels comes equipped with a Darlington tran-

channels share common collectors and integral sup-

diodes for inductive loads. Figure 3-4 shows how to connect an

outputs.

the external voltage source to the card. Please take care that

IDO pin not exceed 200 mA.

Figure 3.4: Isolated Digital Input Channel Con nect ions

3.6 Field Wiring Considerations

• When you use USB-4718 to acquire data from outside, noises in the

environment might
ments

if due cautions are not taken. The following measures will be

helpful to

reduce possible interference running signal wires between

signal sources and

• The signal cables must be kept away from strong electromagnetic

sources such as
welding machines,
ference. Keep the
since it can significantly

• If the cable travels through an area with significant electromagnetic

interference, you should
as the analog input cable.
together and
be

connected to one point at the signal source ground.

• Avoid running the signal cables through any conduit that might have

lines in it.

power

significantly affect the accuracy of your measure-

the USB-4718.

power lines, large electric motors, circuit breakers or

since they may cause strong electromagnetic inter-

analog signal cables away from any video monitor,

affect a data acquisition system.

adopt individually shielded, twisted-pair wires

This type of cable has its signal wires twisted

shielded with a metal mesh. The metal mesh should only

31 Chapter 3

• If you have to place your signal cable parallel to a power line that has a

voltage or high current running through it, try to keep a safe dis-

high
tance

between them. Or place the signal cable in a right angle to the

power line

to minimize the undesirable effect.

USB-4718 User Manual 32

A

2

Specifications

Appendix A Specifications

A.1 Analog Input

Table A.1: Analog Input

Channels 8 differential
Input type mV, V, and mA
Input range J, K, T, E, R, S and B Thermocouple

Sampling rate 10 samples/s(total)
Accuracy ±0.1% or better

Zero drift ±0.3 uV / °C
Span drift ±25 ppm / °C
CMR @ 50/60 Hz 92 dB

Input impedance 1.8 M

A.2 Accuracy for Thermocouple:

Table A.2: Accuracy for Thermocouple

Input Range Typical Accuracy Maximum Error
J thermocouple 0 to 760 °C ±1.0 °C ±1.5 °C
K thermocouple 0 to 1370 °C ±1.0 °C ±1.5 °C
T thermocouple -100 to 400 °C ±1.0 °C ±1.5 °C
E thermocouple 0 to 1000 °C ±1.0 °C ±1.5 °C
R thermocouple 500 to 1750 °C ±1.2 °C ±2.5 °C
S thermocouple 500 to 1750 °C ±1.2 °C ±2.5 °C
B thermocouple 500 to 1800 °C ±2.0 °C ±3.0 °C

NOTE: Due to the location of the CJC sensor, the measurement will have

a 1°C max. difference in channels.

USB-4718 User’s Manual 34

Uni-polar 0~15mV, 0~50mV, 0~100mV,

0~500mV, 0~1V, 0~2.5V, 0~20mA,
4~20mA

(voltage an d cu rre nt inp ut)

A.3 Isolated Digital Input

Table A.3: Isolated Digital Input

Channels 8
Interrupt Inputs N/A
Optical Isolation 2500 VDC
Opto-isolator response

time
ESD 2,000 VDC

Input Voltage VIH (max.) 30 VDC

Input Current 10 VDC 2.9 mA (typical)

A.4 Isolated Digital Output

Table A.4: Isolated Digital Output

Channels 8
Optical Isolation 2500 VDC
Opto-isolator response time 25µs
Supply Voltage 5 ~ 30 VDC

Sink Current 200 mA max./ch, 1.1A/total

25 µs

VIH (min.) 5 VDC
VIL (max.) 3 VDC

12 VDC 3.5 mA (typical)
24 VDC 7.2 mA (typical)
30 VDC 9.1 mA (typical)

35 Chapter A

A.5 General

Table A.5: General

I/O Connector Type
Dimensions (LxWxH)

Watc hd og timer Yes
Power requiremen ts USB bus-powere d

Power Consumptio n
Temperature Operation

Relative Humidity

USB-4718 User’s Manual 36

Removable 10-pin screw terminal x 4

132 x 80 x 32 mm (5.2" x 3.2" x 1.3")

100mA @5V max.

Storage

5~ 95 % RH non-condensing (refer to IEC 68-2­1, 2)

0~60° C (32~140° F)

(refer to IEC 68-2-1, 2)

-20~70° C (-4~158° F)

B

2

Function Block

Appendix B Function Block

USB-4718 User Manual 38

C

2

Firmware Download
Utility

Appendix C Firmware Download

Utility

The firmware download utility can help you update your device’s

firmware to the newest
improvements.

Note:

C:/Program Files/Omega/USB-4700/Examples

by default.

The steps on the following pages will guide you through the USB-4718
firmware update.

USB-4718 User Manual 40

version to get the latest bug fixes and function

After inst al lat io n, the USB firmware down loa d

utility is

located at

Step1 - Select Device: Launch the firmware download utility and press

“

Select…”

firmware version at the “Firmware Version” item.

button to choice the target device. You can check the working

Figure C.2: USB Download Utility

Step2 - Select Firmware File: Press “

firmware.

Load…”

button to select the

Figure C.3: Firmware Selection

41 Appendix C

Step3 - Download Firmware: Press “

Download

” to start downloading
the firmware to your target device. Then press “OK”, unplug your device
and reinstall it

to bring the new settings effective.

Figure C.4: Firmware Download Completed.

USB-4718 User Manual 42

D

Analog Input Calibration

Appendix D Analog Input Calibration

The following steps will guide you through the USB-4718 analog input
channel software calibration.
input calibrating procedures
analog input channels.

D.1 Voltage Input Calibration

You need to calibrate only one channel (AI0). The other channels of
USB-4718 will be calibrated automatically.

NOTE:

input mode

Step 1: Click the “

launch the USB-4718 Device Setting window. Then click “
to start the calibration process. The Calibration Wizard window will pop
up.

Please make sure that the JP1 on USB-4718 is set to voltage

before you start voltage input calibrating.

Setup” button in the Device Manager window to

USB-4718 User’s Manual 44

Please perform BOTH voltage and current

to

complete the calibration of USB-4718’s

Calibration”

Figure D.1: USB-4718 Device Setting window

Step 2: Select “0~0.015V

” voltage input range (or any) and connect the
0V voltage source to AI0 of USB-4718, then click “
information box
pleted. Then click

will show up after the zero range calibration

“OK”.

45 Chapter D

Calibrate

”. The

is com-

Figure D.2: USB-4718 Calibration Wizard

Figure D.3: Zero range calibration complete

Ste p 3 : Please start the

range voltage source and click
and click “

OK

” to finish the calibration process

full range calibration

“Calibrate

USB-4718 User’s Manual 46

by connecting to the full

”. You will see a dialog box

Figure D.4: Full range calibration

Figure D.5: Calibration Complete

Step 4:

Please repeat the procedures above to complete the other input

ranges (0~0.050V/0~0.100V/0~0.500V/0~1.0V/0~2.5V) calibration.

47 Chapter D

D.2 Current Input Calibration

You need to calibrate only one channel (AI0). The other channels of
USB-4718 will be calibrated automatically.

NOTE

: Please make sure that the JP1 on USB-4718 is set to current input

mode before you

start voltage input calibrating.

Step 1

: Please follow the procedures of voltage input calibration but

select

the current input range setting in Calibration Wizard.

Figure D.6: Select the current input range setting

Ste p 2 :

Please perform the
current source) and the
rent source) as

well.

zero range calibration

full range calibration (connect to a 20mA cur-

USB-4718 User’s Manual 48

(connect to a 0mA

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 the company will be as specified and free of defects. OMEGA MAKES
NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESSED 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 WARRANTY

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 2007 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.

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Shop online at omega.com

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