Page 1
WB-AVO OPERATOR’S MANUAL
Table of Contents
0
Page 2
TABLE OF CONTENTS
In Chapter 1
Contents
Features at a Glance
Chapter 1 Introduction
General Information
Features and Configurations
WB-AVO Operator’s Manual
iv
1 – 1
1 – 3
ACAO E02/P01 05/95 OMEGA
i
Page 3
WB-AVO OPERATOR’S MANUAL
In Chapter 2
Table of Contents
ii
Contents
Chapter 2 Installing the WB-AVO
Overview
Verifying WB-AVO Switch Settings
Illustration of the WB-AVO Board
Physical Board Installation
Setting the Voltage/ Current Switches
Setting the Board Number Switches
Setting the Base Address Switches
2 – 1
2 – 2
2 – 3
2 – 4
2 – 6
2 – 8
2 – 10
Page 4
TABLE OF CONTENTS
In Chapter 3
Contents
Chapter 3 Technical Notes
Overview
Pin Assignments for the WB-AVO
Block Diagram
Recalibration
Editing Calibration Files
Calibration File Format (CALOUT.DAT)
Reconstructing A Lost Calibration File
Using EDITCAL
Troubleshooting: Installation
Troubleshooting: Operation
Product Specifications
WB-AVO Operator’s Manual
3 – 1
3 – 2
3 – 3
3 – 4
3 – 5
3 – 7
3 – 9
3 – 9
3 – 11`
3 – 12
3 – 14
iii
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WB-AVO OPERATOR’S MANUAL
Features at a Glance
Highlights of the WB-AVO
Analog Output Channels
WB-AVO-8
8:
WB-AVO-2
2:
Analog Output Resolution
12 bits (.024%)
Maximum Output Rate
130 kHz
Front Matter
iv
Both Models of the WB-AVO Feature
Three voltage output ranges, one current output range
Eight Digital I/O lines, user configurable · Factory
guaranteed accuracy for two years from date of purchase
Page 6
INTRODUCTION
DEVELOPMENT
General Information
Chapter 1: Introduction to the ACAO
Thank you for selecting the WB-AVO for your project!
Our primary objective is to provide you with data acquisition systems that are
easy to install, operate, and maintain. We also strive to furnish the performance you need at the lowest overall cost. The benefits for you are increased
productivity, data you can count on, and, of course, meeting your budget.
We manufacture the WB-AVO as an enhancement boar d that r eadily mounts
in an expansion slot in an IBM PC, or -compatible, computer.
This product’s guaranteed long term stability make it ideal both for the laboratory and for harsh industrial environments.
Using the WB-A VO together with our graphical interface application software
(such as W orkBench™ PC for DOS or Windows, or QuickLog™ PC), you can
easily and very quickly implement a broad spectrum of research and commer cial tasks, in a wide variety of settings. You can, for example,
· Ramp, hold, or step
analog outputs,
SYSTEM
· Control processes
· Set alarm
· Control devices at preset levels
· Control devices from digital input
· Control processes unattended
Y ou can use the system interactively, operating contr ols or modifying your setup while the system is running.
People who decide, on the other hand, to write their own software (rather
than using an off-the-shelf application) can employ the Analog Connection
on any digital input,
with proportional or on/off control,
(fans, pumps, heaters, etc.),
(e. g., from switches or TTL
signals), and
.
WB-AVO Operator’s Manual
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Page 7
WB-AVO OWNER’S MANUAL
EXPANDABILITY
RANGES/
DATA
General Information
Development System™ hardware driver to address all features of
the board from within a program they design and code for their
specific purpose.
The WB-A VO has either two or eight analog output channels and
eight digital input/output lines; and you can add one board at a
time to your computer, for as many as 15 boards with a total of
120 analog output channels and 120 digital I/Os! In addition, separate analog input cards may be used with the same software.
The WB-A VO featur es switch-selectable ranges of 0-10V, 0-5V, or
UNITS OF OUTPUT
PRESENTATION
±5V for voltage output, and 4-20mA for current output. Self-calibration and self-diagnostics are built into the board to ensure that
the output is always accurate.
The combination of our hardware and application software
(WorkBench PC for DOS or Windows or QuickLog PC) enables
both the display of data on the screen, and the logging of data to
disk for later analysis.
Chapter 1 Introduction
1 – 2
Features and Configurations
Page 8
ANALOG OUTPUT
CHANNELS
RESOLUTION
DATA ACQUISITION
ACCURACY
DIGITAL I/O
TERMINAL
FOR MORE
SYSTEM
SPEED
PANEL
INTRODUCTION
Features and Configurations
The WB-A VO-12-2 has two output channels, while the WB-AVO12-8 allows for up to eight analog outputs.
The WB-AVO is capable of attaining 12-bit resolution (that is,
.024% of signal).
The WB-AVO is capable of attaining a data acquisition speed of
130 kHz, depending on the software being used. The maximum
data acquisition rate supported by our software for the WB-AVO
is 1 kHz.
We guarantee the factory calibration of the boards for a period of
two years from the date of purchase. (If it is ever necessary, the
user can recalibrate the board with precision through the use of
software utilities we provide with every product.)
The WB-AVO features 8 digital input/output channels that the
user can configure individually to be input or output.
An available accessory for the WB-AVO is the WB-T31 general
purpose terminal panel, which includes terminals for eight analog
outputs and eight digital I/Os.
INFORMATION
REQUIREMENTS
For more information about the capabilities of your data acquisition board, please see the “Product Specifications” in this chapter.
For instructions on controlling the board with our interface software (such as WorkBench PC for DOS or Windows or QuickLog
PC), refer to that particular software manual.
To learn more about data acquisition and process control in general, and how to use the Analog Connection systems together to
accomplish everyday tasks, consult our
Applications
manual.
And, last but not least, if you’re creating your own program to
address the board for a custom purpose, please see the
Connection Development System
manual
.
Analog
Before installing the board, make sure the computer system fulfills
these minimum requirements:
WB-AVO Operator’s Manual
1 – 3
Page 9
WB-AVO OWNER’S MANUAL
System Requirements
Hardware –
· IBM PC XT, AT, (or higher), or -compatible
640k system RAM and full-size slot for WBAVO-8 or half-size slot for WB-AVO-2
· Floppy disk drive
Software Environment –
· DOS 3.0
(or higher, depending on the application software),
· Application software
and a hard drive.
(WorkBench PC for DOS or Windows,
QuickLog PC, the Analog Connection Development System, or other compatible proprietary software; please see
your software manual for directions for using it with the
WB-AVO).
, with at least
Chapter 1 Introduction
1 – 4
Page 10
TECHNICAL NOTES
Chapter 2: Installing the WB-AVO
Getting your WB-AVO data acquisition and process control board up and
running is a straightforward process; you only need to
Overview
· Verify the board’s switch settings
system addressing of OMEGA products,
· Physically insert the board
· Set the voltage/current switches
making,
· Connect a terminal panel to the board
· Load and start up the software
As the scope of this manual focuses on the WB-A VO board, this chapter discusses the board’s switch settings, and the physical insertion of the board.
Please see your terminal panel manual for full instructions regarding its
attachment to the WB-AVO, as well as for how to connect sensors to the
panel.
Guidelines for loading the software, and for starting up, depend on the
application program you are going to use (such as our WorkBench PC for
DOS or Windows, or QuickLog PC, or a package by a third party developer
who has our authorization).
The program you are going to use with the WB-AVO might even be unique
and proprietary, a product of your organization. (The Analog Connection
Development System is a powerful set of utilities making it possible for software engineers to design and develop their own programs to exploit the
WB-AVO’s many features.)
that control board identity and
into a slot of the personal computer,
to suit the measurement you are
, and
to be used for the project.
In any event, please refer to the software provider’s installation manual, or
user guide, for specific information on how to load and run the particular
program.
Troubleshooting –
to the “Troubleshooting” section in Chapter 3.
If you have any difficulty getting your board to work, refer
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WB-AVO OPERATOR’S MANUAL
SINGLE BOARD
MULTIPLE
PREVIOUSLY
Verifying Switch Settings
Verifying WB-AVO Switch Settings
When you purchase a data acquisition board new from our company, the product’s switch settings already ar e correct to operate a
single
board with our software (WorkBench PC for DOS or Windows, QuickLog PC, the Analog Connection Development System, and all others).
This means the factory switch settings are right for the purpose of
using only one board, and you can skip the task of confirming
them. You can go directly to the “Physical Board Installation” section on page 2 – 4 in this chapter, and begin to follow the steps
there.
If you are using more than one board at a time, set the individual
BOARDS
boards’ Board Number Switches first (refer to “Setting the Board
Number Switches” on page 2 – 8), then go on to perform the
physical installation.
Otherwise, there’s no reason to be concerned about the board’s
switch settings, except in the unlikely event you encounter a
problem in getting your product to operate. (If you experience a
problem, refer to “Troubleshooting,” in Chapter 3).
IN USE
Chapter 3 Technical Notes
3 – 2
If, on the other hand, your board has been in use previously in
another computer, or if your company uses its own proprietary
software, the present switch positions might differ from the factory settings.
If your company uses such a program, making changes to factory
switch settings might be necessary to accommodate it. Please
consult the administrator of your internal system, or the provider
of third party software, to determine their recommendations for
any unusual switch setting.
To check and restore the factory values, please read “Setting the
Board Number Switches” on 2 – 8 in this chapter.
Page 12
TECHNICAL NOTES
WB-AVO Board
Attach
cable
connector
from
terminal
panel
here
Board Number
switches (5 – 8)
–
AWB-AVO-2
Base Address
switches (1 – 4)
Back
panel
mounting
bracket
insert; seat firmly
WB-AVO-8
V/C7 RANGE V/C8 V/C5 RANGE V/C6 V/C3 RANGE V/C4 V/C1 RANGE V/C2
Illustration of WB-AVO Data Acquisition Board, Showing Physical Installation
Current/Voltage
C/V Range
switches (detail:)
switches (detail:)
↑
↑
Voltage
Current
PC expansion slot
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WB-AVO OPERATOR’S MANUAL
TERMINAL PANEL
PHYSICAL
Physical Installation
Physical Board Installation
Installation very simply consists of inserting the board into an
open peripheral (expansion) slot inside your computer.
(There are, for example, five available slots in the IBM PC, and
eight in the IBM XT or AT. IBM and other companies sell expansion chassis that can accept even more analog cards. Our software
supports as many as 15 boards at one time.)
When using a terminal panel with the WB-AVO you are going to
CONNECTIONS
be using a single ribbon cable from the terminal panel. This cable
plugs into a 50 pin connector at the back panel of the WB-AVO
and, at its far end, plugs into a 50 pin connector at the terminal
panel.
(Refer to the illustration on page 2 – 3; always check to confirm
that the attachment of the cables is according to the diagram.)
Each 50 pin cable connector has a key on one side that mates
with a socket on the device; be sure to observe polarity when
attaching.
INSTALLATION
Chapter 3 Technical Notes
3 – 4
To Install the WB-AVO Board –
1.
TURN THE COMPUTER OFF!
puter without first turning its power switch to the “off” position.
2.
Open the Computer
appropriate, refer to your computer’s owner’s manual for
more information about removing the cover and installing
enhancement boards.)
3.
Ground Yourself
touch the metal chassis of the computer to discharge any
static electricity that might be on the surface of your body.
This is important, as static electricity can damage electronic
parts. (Likewise, if you ever remove the board from the computer, always store it in its protective shipping bag.)
4.
Remove
unscrew and remove the narrow dust cover plate that is
directly behind the expansion slot you want to use. (Keep
this screw handy.)
the Dust Cover
Remove the cover of the computer. (If
While holding the board, before installing it,
Never remove the cover of the com-
At the back panel of the computer,
Page 14
TECHNICAL NOTES
CAUTION
Physical Installation
5.
Insert the Board
Push the edge of the WB-AVO board having
“gold fingers” down and into the expansion slot (socket) on
the chassis so that the contacts align with the socket, then
plug it in by pushing the board straight down.
6.
Fasten the Board to the Chassis
Install the “left over” screw from
step 4. Place it in the original hole, through the WB-AVO
board’s bracket, so that it fastens the top of the bracket to the
computer’s back panel.
7.
Connect the Cable to Board and T erminal
Panel
Plug the cable into
the data acquisition board, and the connector on its far end
into the socket on the terminal panel (please refer to your terminal panel’s manual, if you are unsure about the correct
position).
Incorrect installation of these cables can damage the data
acquisition board or the terminal panel. If you are uncertain
about proper placement, please see “Terminal Panel Connections” at the beginning of this discussion, and inspect the diagrams on page 2 – 3 and 3 – 2.)
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WB-AVO OPERATOR’S MANUAL
SETTING
Setting the Voltage/Current Switches
Setting the Voltage/Current Switches
The analog output channels of the WB-AVO (two on the WBAVO-2 and eight on the WB-AVO-8) can be set to output in
either voltage or current. There are five possible range settings –
four voltage and one current – for each channel. These voltage/
current ranges are set with series of switches on the hardware.
THE SWITCHES
To Set the Voltage/Current Switches –
1. Locate
2. Set the V/C Switches
3. Set
the Switches
examine the illustration on page 2 – 3 in this chapter and find
the “Voltage/Current Switches” and “V/C Range Switches” on
the WB-AVO.
On the printed circuit board itself, the Voltage/Current is a single switch labeled “V/C”. The V/C Range is of a block of four
DIP switches labeled “Range.”
Note that there are three switches for each analog output channel: one large V/C Switch (labeled V/C1 for Channel One,V/C2
for Channel Two, etc.) to set the output for voltage or current
and two small DIP switches to set the voltage range.
channel is to be a voltage or current.
For voltage output, you must turn the V/C Switch up; leave it
down for a current output.
Set the V/C Switch for each channel accordingly.
the V/C Ranges for each channel
for Channels One and Two are on the same switch module.
Switches 1 and 2 select the ranges for Channel One, while 3
and 4 set the ranges for Channel Two.
With the cover of your computer removed,
Determine whether the output for each
Note that the range switches
Chapter 3 Technical Notes
3 – 6
(For WB-AVO-8 boards, Channels Three and Four are paired
similarly, as are Channels Five and Six and Seven and Eight.)
The first range switch for each channel (Switch 1 or 3) selects
unipolar or bipolar voltage outputs. Down selects unipolar; up
will output bipolar.
The second range switch (Switch 2 or 4) will determine
whether the output will be 5 or 10 Volts. An up setting selects
5 volts; down is 10 volts.
Page 16
TECHNICAL NOTES
NEXT STEPS
Setting the Voltage/Current Switches
Note that the range switches do not effect current outputs. If
you set a channel for current, it will automatically output in
the 4-20mA range.
See the tables below for detailed V/C switch settings.
V/C Switch Settings for Analog Output Channels –
2
Range
V/C Switch
Position
1
V/C Range Switch Positions
Switch 1/3 Switch 2/4
0 to 10V
0 to 5V
±5V
±10V*
4 to 20mA
1. U = Up D = Down
2. Switches 1 and 3 set the voltage ranges for Channels 1,3,5
and 7. Switches 2 and 4 set the ranges for Channels 2,4,6
and 8.
* Selecting the ±10V range is an error condition. This range
can be used, but the output is not in ±10V. Output ranges
from -10V at 20% to +10V at 100% of full scale. It does not
go below approximately -11V at 16%.
Single Board Usage –
UD D
UD U
UU U
UU D
D– –
If you intend to run with a single data acquisition
board in your system, you are now ready to install your application
software.
Multiple Board Usage –
If you are going to use more than one data
acquisition board, now it’s time to set each board’s Board Number
Switches to an unique number. Follow the steps in the “Setting
the Board Number Switches” section in this chapter on page 2 – 8.
Installing the Software –
For information on loading and configuring our WorkBench PC for DOS or Windows or QuickLog PC
please refer to the user guide for that application package.
Installing the T erminal Panels –
T o learn how to connect experiments
to the terminal panel see your terminal panel owner’s manual, or
our Applications manual (which discusses data acquisition and
control in general and provides examples of uses for the products).
WB-AVO Operator’s Manual
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WB-AVO OPERATOR’S MANUAL
MULTIPLE BOARDS
SINGLE BOARD
DISABLING BOARDS
SETTING
Setting the Board Number Switches
Setting the Board Number Switches
When you are using multiple boards in your installation, each
board needs to have an identity for the software to recognize it as
an “individual.”
The Board Number Switches on a board accomplish this, as they
enable you to set an identifying number for the board.
This number determines, among other things, the sequence in
which the software reads multiple boards (the software pr ograms
can address as many as 15 boards).
When using more than one WB Family product in your installation, every board’s Board Number Switches need to have a different number setting, and all settings are to be in number sequence
(1, 2, 3, for example, if you are using three boards).
(If there are also WB-FLASH12 or WB-WORKMATE boards in
your installation, then their Board Numbers need to be at the
high end of the number sequence.)
THE SWITCH
If your system includes just a single data acquisition board, then
you don’t need to be concerned with the Board Number Switches.
When your WB-A VO leaves our manufacturing facility, the Board
Number switches are set to 1. This is the setting we recommend
for most purposes when you are using only one board in your
installation.
If you want to disable the board, for any reason, set its Board
Number Switches to 0. (This is handy if you want to use fewer
boards for a while: that way you don’t have to r emove them from
the computer.)
To Set the Board Number Switches –
1. Locate
2.
the Switches
examine the illustration on page 2 – 3 in this chapter and find
the “Board Number Switches” on the WB-AVO.
On the printed circuit board itself, these are located within a
block of eight DIP switches; switches 5 through 8 represent
the Board Number.
Make
the Setting
setting combinations.
Determine which is to be the First Board. (This is easy, if it is
With the cover of your computer removed,
Note that the four switches have 16 possible
Chapter 3 Technical Notes
3 – 8
Page 18
TECHNICAL NOTES
Setting the Board Number Switches
the sole board.) Then set the switches for Board Number 1. (See
the table below for board number settings.)
The software interprets Board 1 to use system installation digital
I/O channels 1- 8 and analog output channels 1 through 8 (if it’s
an WB-AVO-8), or system installation analog output channels 1
through 2 (if it’s an WB-AVO-2).
Determine which is to be the Second Board, then set the
switches for Board Number 2.
The program then recognizes Board 2 to use system installation
digital I/O channels 9 - 16 and analog output channels 9 to 16
(for an WB-AVO-8) or 3 - 4 (for an WB-AVO-2).
3. Set All Switches
Continue to set the switches for all installed
boards to unique numerical values in an unbroken sequence.
(As various models of our boards use different kinds of
switches, please see their operator’s manuals for an explanation
of how to set switches.)
WB-AVO Board Number Switch Settings –
Board
Number
Switch Positions*
5 6 7 8
0 (disabled) D D D D
1 U D D D
2 D U D D
3 U U D D
4 D D U D
5 U D U D
6 D U U D
7 U U U D
8 D D D U
9 U D D U
10 D U D U
11 U U D U
12 D D U U
13 U D U U
14 D U U U
15 U U U U
* U = Up D = Down
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WB-AVO OPERATOR’S MANUAL
SETTING WB-AVO
Setting the Base Address
Setting the Base Address
The Base Address determines the logical system address where
the personal computer expects to find all data acquisition boards.
Base Addresses must be the same
The factory setting for the WB-AVO products is B00H (in hexadecimal format); the analog input boards in the WB family have a
base address of 300H. The two digits “OO” must be the same for
all WB family products.
It is rarely necessary, but if you have difficulty getting the board
to work you can change these switches to values different from
the factory settings. (Another device in your PC, for example,
might be trying to use the same Base Address.)
Indications of this are: if the program reports it cannot find your
board, or if it reports fewer boards than you really have, or if
another board starts to work improperly after you install the WBAVO.
These problems indicate interference with another board using
the same base address as the WB-AVO product.
Remedy the problem by changing the switches of all WB-AVO
boards to an address that has no conflict. (If you have boards
other than WB-AVOs in your system, please refer to their operator’s manuals for instructions.)
on all boards.
BASE ADDRESS
Chapter 3 Technical Notes
3 – 10
To Set the Base Address –
1. Locate the Address Switches
puter over the data acquisition board, and find the location of
the Base Address switches. Refer to the board illustration on
page 2 – 3 in this chapter and find “Base Address Switches”
on the WB-AVO diagram.
On the printed circuit board itself, these are located within a
block of eight DIP switches; switches 1 through 4 represent
the base address.
(NOTE: Depending on the space available in your installa-
tion, it might be necessary to remove the board to reach the
Base Address Switches. If so, please follow the same precautions as in “Physical Installation” on page 2 – 4 in this chapter.)
Remove the cover of your com-
Page 20
TECHNICAL NOTES
CAUTION
Setting the Base Address
2. Change the Setting
B00H is the normal base address. It consists of all four DIP switches being in the “down” position
(when the board is sitting in the computer’s expansion slot).
The DIP switches have the labels “1” through “4.” Sliding a
switch to the “up” position
adds
a value to B00H:
WB-AVO Base Address Switch Additive* Values –
Switch Position To 300H Add
1 Up 10H
2 Up 20H
3 Up 40H
4 Up 80H
* As the switches are additive, your sliding
Switches 1 and 4 down, for example, is going to
add 10H and 80H to the 300H, equalling 390H.
If you are having a problem with Base Address, we recom-
mend first trying 340H as an alternative to the factory setting
of 300H.
Values to Avoid –
There are several Base Address values you
need to avoid, that we know can cause interference with
other devices in some PC installations:
WB-AVO Base Addresses to Avoid –
Value
B20H U D U U
B70H D D D U
Switch Positions*
1 2 3 4
Can Interfere With
Hard disk drive
Parallel printer
BB0H D D U D Monochrome display
BD0H D U D D Graphics adaptor
BF0H D D D D Floppy disk drive
* U = Up D = Down
WB-AVO Operator’s Manual
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WB-AVO OPERATOR’S MANUAL
Chapter 3 Technical Notes
3 – 12
Page 22
TECHNICAL NOTES
Chapter 3: Technical Notes
Although operations in this chapter are seldom necessary during everyday
data acquisition, you might want to refer to them at certain times during
operation of the WB-AVO. They are
· Pinouts (at the board’s connectors, in the event you want to connect analog or digital signals directly, without using a terminal panel;
please refer to page 3 – 2);
· Block diagram of the WB-AVO showing on-board processing (please
see page 3 – 3);
· Recalibration of all WB-AVO on-board references to bring the accuracy
of the product to factory specifications (see page 3 – 4);
· Editing calibration files to accommodate changes to your installation, or
to restore missing files (on page 3 – 5),
Overview
· Troubleshooting: some possible problems and solutions after installing,
and during operation of the WB-AVO (beginning at page 3 – 11).
WB-AVO Operator’s Manual
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Page 23
WB-AVO OPERATOR’S MANUAL
Pin Assignments
Board Pinouts for the WB-AVO –
channel 1 – output
channel 2 – output
channel 3 – output
channel 4 – output
channel 5 – output
channel 6 – output
channel 7 – output
channel 8 – output
Analog ground
No connection
Analog ground
Connector
key notch
Analog ground
– 12 Volts
No connection
2
1
4
3
6
5
8
7
10
9
12
11
14
13
16
15
18
17
20
19
22
21
24
23
26
25
27
28
channel 1 + output
channel 2 + output
channel 3 + output
channel 4 + output
channel 5 + output
channel 6 + output
channel 7 + output
channel 8 + output
Analog ground
10 Volt Reference
+ 5 Volts
Analog ground
+ 12 Volts
No connection
Chapter 3 Technical Notes
3 – 2
No connection
No connection
digital I/O 8
digital I/O 7
digital I/O 6
digital I/O 5
digital I/O 4
digital I/O 3
digital I/O 2
digital I/O 1
+ 5 Volts
29
30
31
32
34
33
36
35
38
37
40
39
42
41
44
43
46
45
48
47
50
49
No connection
No connection
digital ground
digital ground
digital ground
digital ground
digital ground
digital ground
digital ground
digital ground
No connection
Page 24
TECHNICAL NOTES
Block Diagram
2 or 8
Analog Outputs
Real World
8 Digital I/O Lines
Block Diagram of the WB-AVO (All Models) –
+5V, ±12V
Range & Voltage/Current
Switches
Reference
Voltage
12-Bit D/A
Converter
Amplifier
2 converters and 1 amplifier per channel
I/O
Latches
6-Bit
D/A Adj
Computer Bus
Computer Bus
Interface
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WB-AVO OPERATOR’S MANUAL
FACTORY
RECALIBRATION
Recalibration
Recalibration
Your WB-AVO uses an exclusive calibration technology to
achieve great stability, requiring no adjustment for years. (As a
reflection of this, we guarantee the factory tolerances for two
years from the date of purchase.)
Instead of employing adjustment potentiometers to calibrate the
METHODS
board, our technicians test and calibrate each WB-AVO after
assembly. They then enter that board’s unique calibration number
values into a disk file that you receive with the product
(CALOUT.DAT, for analog output channels; we also print the
same numbers on a label on the back of the board itself).
Whenever you use our software with the board thereafter, the
programs read the factory’s calibration numbers from the disk
file, and automatically make minor compensations for real-world
conditions (for instance, high external temperatures that marginally affect calibration).
Under normal conditions, no full recalibration of the WB-AVO is
necessary.
(If you ever suspect that your WB-A VO is out of tolerance, please
call Technical Support for advice. If it requires recalibration, we
can perform the work for you at our facility using the same high
accuracy test equipment we use during the manufacturing quality
assurance process.)
A Note About RECAL.EXE –
on the QuickLog PC disk, RECAL.EXE, is for the purpose of
completely recalibrating our data acquisition boards. This software, however, is only suitable for use in a comprehensive hardware lab, and requires sophisticated test equipment.
One of the utility programs we distribute
Chapter 3 Technical Notes
3 – 4
(Successful use of RECAL.EXE requires, for example, a precision
DC voltage supply, as well as a digital volt meter having .005%
accuracy.)
Only if your organization is proficient in such techniques, and
only if you have the necessary equipment, do we encourage you
to proceed with recalibration (and please contact our Technical
Support Department for guidelines).
For most customers, we recommend returning the board to our
Technical Services Department, instead.
Page 26
TECHNICAL NOTES
CALOUT.DAT
EDITCAL
Editing Calibration Files
Editing Calibration Files
Depending on your usage of the WB-AVO, your work might
require a more common involvement with calibration: modifying
values in the calibration file on disk.
This can be essential to accommodate occasional changes in your
data acquisition setup.
It’s necessary to edit calibration numbers (using EDITCAL.EXE,
the software utility we distribute with the WB-AVO, on the
QuickLog PC disk) whenever you
· Reconstruct CALOUT.DAT if this disk file, which holds factory calibration numbers, is lost (the software tries to read
these files upon startup); or
· Change the quantity of boards in your installation; that is,
when you add data acquisition boards to, or remove them
from your computer system.
The CALOUT.DAT file maintains analog output channel calibration figures for all WB-AVO boards in the installation.
UTILITY
CALOUT .DAT is a simple text file containing lines of numbers, or
values.
(Another calibration file, CALIB.DAT, contains the analog input
channel numbers for all Analog Connection (WB_AAI/FAI, WBASC, or WB-ASC16) boards in the installation, and their thermocouple terminal panels. For more information on CALIB.DA T, see
the owner’s manual for any of the Analog Connection boards).
(Regarding DATAshuttles, WB-FLASH12 boards and WB-
WORKMATE boards: If your installation also includes any of
these products, remember that they handle calibration values differently from the WB-AVO or Analog Connection boards. Their
calibration figures reside on-board, in Electrically Erasable Programmable Read Only Memory – EEPROM – chips, rather than
in disk files. As a result, their calibration numbers do not appear
in either CALOUT.DAT or CALIB.DAT).
EDITCAL.EXE (or EDITCAL, for short) is the utility program that
simplifies the modification of values in CALOUT.DAT.
(Instructions for using the program are on page 3 – 9 in this manual; but please continue to read this discussion, which describes
WB-AVO Operator’s Manual
3 – 5
Page 27
WB-AVO OPERATOR’S MANUAL
CAUTION
RECONSTRUCTING
MULTIPLE
Editing Calibration Files
the format of the calibration file, before starting. Also note that it
is possible, although more difficult, to modify numbers in the
disk calibration files with a text editor. We recommend using
EDITCAL.)
If a calibration file’s numbers are inaccurate or missing, this
means the calibration of the cards is going to be in error. When
you edit these files, take care to enter the numbers accurately.
Reconstructing CALOUT.DAT –
CALIBRATION FILES
reconstruct the calibration file for WB-AVO boards if the file happens to be lost entirely.
(If you still have the original distribution disk you can, of course,
restore the original factory calibration numbers from disk).
As the CAL NO label on every WB-AVO board shows that individual board’s values, it is a straightforward task to enter the figures into new calibration disk files through the use of EDITCAL.
(The CAL NO label can be found on the back of the WB-AVO
board; the calibration values are listed right after the serial number.)
Changing the Quantity of Boards –
BOARDS/PANELS
tains calibration numbers for all WB-AVO boards in your system.
When adding an additional WB-AVO board to the computer
installation, it is essential to use EDITCAL to “merge” its numbers
into the existing calibration disk files.
EDITCAL provides the capacity to
A single CALOUT.DAT file main-
Chapter 3 Technical Notes
3 – 6
In like manner, if you remove an WB-AVO from the system, you
need to run EDITCAL, removing that device’s calibration numbers from the file.
Calibration File Format
Page 28
ANALOG OUTPUT
CALIBRATION FILE
CALOUT.DAT
TECHNICAL NOTES
Calibration File Format
The file CALOUT.DAT contains analog output channel calibration numbers for all WB-AVO boards.
CALIB.DAT Format –
The file CALOUT.DAT looks like this:
Content of CALIB.DAT –
LINE DATA MEANING
1 ANALOG
(identifier)
OUTPUT
HEADER
CALIBRATION
20
3
4
(and
so
on)
GROUP A
1000,1,2,3,4
1001,1,2,3,4
(this group continues for as
many boards in your installation that have analog output
channels)
Analog output board 1’s serial
number, then its WCAL,
XCAL, YCAL, ZCAL values*;
next, analog output board 2’s
serial number, and its WCAL,
XCAL, YCAL, ZCAL values*,
et al
After the #: Range settings for
each and every analog output
channel on board 1; next,
range settings for each and
every analog output channel
on board 2, et al
n
n
(and
so
GROUP B
on)
# RANGES
01,23,11,20
12,03,21,02
(this group continues for as
many boards in your installation that have analog output
channels)
After the @: cal values – the
number of AO channels, followed by calibration values for
each analog output channel on
board 1; next, calibration values for each analog output
channel on board 2, et al
n
n
(and
so
GROUP C
on)
@ CAL VALUES
8,36,42,32,40,40,34,35,38
8,22,23,24,25,26,27,28,29
(this group continues for as
many boards in your installation that have analog output
channels)
NOTES
* If your present CALOUT.DAT file is unusable, find WCAL, XCAL,
YCAL, and ZCAL numbers on your board’s CAL NO label, and enter
the values according to the format in this table.
The third line in the file has the serial number followed by
WCAL, XCAL, YCAL, and ZCAL for the first analog output card.
WB-AVO Operator’s Manual
3 – 7
Page 29
WB-AVO OPERATOR’S MANUAL
Calibration File Format: Analog Output
WCAL, XCAL, YCAL, and ZCAL are the gain calibration numbers
for analog output channels for Analog Connection family products. They correspond to the 0-5V, 0-10V, ±5V, and 4-20mA
ranges, respectively.
A second analog output card has its serial number and calibration
numbers on the next line, and so on.
Following the “# ranges” sign are range settings. (These ordinarily
result from calibrations of the WB-AVO when you start up the
Analog Connection programs.)
Following the “@” sign are the fine tuning calibration values that
result from a recalculation taking place every time you use Analog Connection software. (There is no need to put numbers here.
As with the range settings, the software is going to update them.)
The values are in sequence, one for each channel, one line for
each card.
Chapter 3 Technical Notes
3 – 8
Reconstructing A Lost Calibration File
Page 30
TECHNICAL NOTES
STARTING
Reconstructing a Missing Calibration File
In the event the calibration file CALOUT.DAT becomes corrupt,
or is missing, it’s first necessary to reconstruct a replacement text
file before running EDITCAL. Use any text editor to create a new
file, giving it the appropriate name (CALOUT.DAT).
Enter this text on the first line in the file:
ANALOG OUTPUT CALIBRATION
and then press [ENTER] ten times, to establish a total of 11 lines in
the file. Save the file to the same subdirectory as your other
OMEGA Engineering, Inc. programs.
Now you can use EDITCAL to read and restore the calibration
numbers by using its UPDATE menu selection (please see “Using
EDITCAL”).
EDITCAL
Using EDITCAL
Although the preceding tables might give the impression that
editing calibration files is highly complex, the EDITCAL utility
makes the task relatively easy.
Make sure the EDITCAL.EXE program file is in the same subdirectory as the OMEGA Engineering, Inc. application programs
and the CALOUT.DAT file.
Load the EDITCAL.EXE program from the keyboard:
To Start Up EDITCAL.EXE –
1.
At the DOS prompt, enter EDITCAL, then press the [ENTER]
key. (This invokes the utility.)
WB-AVO Operator’s Manual
3 – 9
Page 31
WB-AVO OPERATOR’S MANUAL
EDITCAL
Using EDITCAL
EDITCAL Main Menu
This program allows for the creation or modification of
calibration data files or hardware EEPROM data on analog
and digital boards. You may create and merge existing
CALIB.DAT or CALOUT.DAT files for multiple boards. You may
update an existing calibration file to add, delete or modify
data. Or you may view or modify EEPROM data or boards.
Do you want to work with calibration data files, view/edit
EEPROM on Analog Connection, highspeed or DATAshuttle boards?
→
use and keys to choose then press ENTER
DATA FILES AC EEPROM HS EEPROM DS EEPROM QUIT
Press the F1 Key at anytime for online help
→
EDITCAL
CALIBRATION UTILITIES
SELECTIONS
Chapter 3 Technical Notes
3 – 10
To Select a Function –
1.
Use the arrow keys to navigate back and forth among these
menu selections:
DATA FILES To merge calibration files supplied from the factory
into a single file for systems that have multiple boards, or to
update existing calibration files.
AC EEPROM To view or modify calibration data on Analog Con-
nection boards that have non-volatile on-board EEPROMS.
HS EEPROMS To view or modify calibration data on high speed
boards EEPROM, such as WB-WORKMATE or WBFLASH12.
DS EEPROMS To view or modify calibration data on DATAshuttle
EEPROM.
QUIT Ends this EDITCAL session.
2.
Move the arrow keys until DATA FILES is flashing.
3.
Press [ENTER].
4.
Move the arrow keys until the selection you want is flashing.
5.
Press [ENTER].
Page 32
TECHNICAL NOTES
Troubleshooting: Installation
Troubleshooting: Installation
If you experience difficulty in getting your data acquisition board
up and running, please check to see that the installation is
according to the descriptions in Chapter 2.
If the software reports a board failure, or that it cannot find a
board, then try these remedies:
1. Confirm that the board is seated properly
(reseat it, if necessary; see the illustration on page 2 – 3).
2. Verify the Board Number Switches
page 2 – 8).
in the PC expansion slot
are not set to “0.” (Refer to
3. Use a different Base Address.
your installation is trying to use the same Base Address
(please see the explanation on page 2 – 10).
It is possible that another device in
4. If there is more than one data acquisition board in your installation
make sure they all have the same Base Address, but different
Board Numbers.
5. Install the board in another open slot
tions on page 2 – 4).
6. Remove other devices
whether or not they are conflicting with your data acquisition
board.
from expansion slots in your PC to check
7. If possible, install the board in another computer
operation.
8. Verify that the software is up to date
the board you are using. Contact us, or your software provider).
9. Remove other terminate and stay resident (TSR)
your system’s AUTOEXEC.BAT file, temporarily.
in the PC (follow the instruc-
to verify its correct
(a version compatible with
programs from
,
WB-AVO Operator’s Manual
3 – 11
Page 33
WB-AVO OPERATOR’S MANUAL
OPERATING
Troubleshooting: Operation
Troubleshooting: Operation
Here are mini “case studies” of difficulties, along with some easy
Qs AND As
solutions:
Problem: After changing the switch settings on my board from voltage to
current or to different voltage ranges, my outputs are inaccurate.
If you change any switch settings on the board, you must
Action:
update the software as well. To do so, go back to DOS and
rerun the GFIND command with the -c parameter.
Problem: I get a “Reference Error” message when I run GFIND.
This error occurs when the traces labeled F1 and F2
Action:
(found on the bottom right of the board) are burnt. In
these cases, you must replace the burnt traces with a
1Amp maximum resistor fuse.
Problem: At start-up, I get a “Cannot Calibrate – check for short” mes-
sage.
This error message occurs primarily when the channel in
Action:
question is set to voltage. During start-up, calibration is
performed on the board if the -c parameter is used with
the GFIND command. Voltage calibration can only be
completed if nothing is connected to the terminal panel. If
there is a connection, you will usually receive this error.
Chapter 3 Technical Notes
3 – 12
To correct this error, you can remove any connections to
the terminal panel. Alternatively, you can rerun the
GFIND command without the -c parameter.
Problem: At start-up, I get a “Cannot Calibrate – check for open” mes-
sage.
This error message occurs primarily when the channel in
Action:
question is set to current. During start-up, calibration is
performed on the board if the -c parameter is used with
the GFIND command. For current calibration to take
place, the +12V terminal must be connected to the +ve
terminal of the channel in question. If this connection is
not made, you will usually receive this error.
Ensuring this terminal connection will usually get rid of
this message. Alternatively, you can rerun the GFIND
command without the -c parameter.
Page 34
IF YOU NEED
CUSTOMER SUPPORT
TECHNICAL NOTES
Troubleshooting: Operation
Problem: My board used to work, but now the software cannot find it, or
reports an error.
Action:
Check to make sure the Board Number Switches are not
set to “0.”
Problem: When my software starts, the outputs of the board momentarily
go to full scale.
If the GFIND program is run with the -c parameter, the
Action:
WB-AVO board will be calibrated by sending full scale
outputs. Removing the -c will prevent this from happening at a slight loss of accuracy.
What to do before calling technical support, to help us serve you better:
Have the part numbers of your boards and terminal panels
1.
ready.
2.
Have the type and version number of the software you’re
using.
3.
Have your computer’s type, model, and the version of the
operating system.
WB-AVO Operator’s Manual
3 – 13
Page 35
WB-AVO OPERATOR’S MANUAL
ANALOG OUTPUTS
ANALOG OUTPUT
RESOLUTION
SPEED
MAXIMUM/
ACCURACY
Product Specifications
Product Specifications
The WB-AVO-2 features two analog outputs; the WB-AVO-8 includes eight analog output channels.
The ACAO can output either voltage or current. Selectable volt-
RANGES
MINIMUM OUTPUT
age ranges include 0–5V, 0–10V, and ±5V ; current is output in the
4-20mA range only.
The WB-AVO can operate with resolution of up to 12 bits.
The WB-AVO has a maximum output rate of 130kHz on a stan-
dard IBM PC running at 4.77MHz (rates are somewhat faster in
faster computers).
For the multi-channel output rate, divide the maximum 130kHz
rate by the number of channels using an assembly language program.
In Voltage Output Mode –
· Output Current: ±15mA minimum
Chapter 3 Technical Notes
3 – 14
· Output Protection: May be shorted to any voltage between +12
and -12V
· Output Impedance: <0.1Ω
In Current Output Mode –
· Maximum Output Voltage: +50V
· Minimum Output Voltage: +2.6V
· Output may be shorted to any voltage between 0 and +50 volts
WB-AVO GENERAL CONDITIONS ACCURACY –
Range Absolute Accuracy Maximum Offset
0 to 10V 0.02% 0.01%
0 to 5V 0.02% 0.02%
±5V 0.07% 0.06%
4 to 20 mA 0.15% 0.04%
Relative accuracy for all ranges is a maximum of 0.01%.
There is a 0.01% maximum linearity for all ranges, guaranteed
monotonic. The differential linearity is a maximum of 0.01%.
Page 36
STABILITY
DIGITAL I/O
CHANNELS
AUXILIARY
TECHNICAL NOTES
Product Specifications
In Voltage Output Mode –
· Temperature Drift:
With self-calibration is 0.002% / ºC maximum
Without self calibration is 0.008% / ºC maximum
· Response time to 0.01% accuracy:
Small step is 2.5µs
5V step is 20µs
10V step is 35µs
In Current Output Mode –
· Temperature Drift:
With self-calibration is 0.006% / ºC maximum
Without self calibration is 0.015% / ºC maximum
· Response time to 0.01% accuracy:
Small step is 2.5µs
16mA step is 10µs
The WB-AVO has eight digital I/O lines, with each line individually selectable as input or output. These channels are TTL- and
MOS- compatible as they come out of the board.
POWER OUTPUT
Their outputs sinks are open collector and are 3 milliAmperes; as
inputs they draw 5 milliAmperes when low. (Please see the specifications in your terminal panel owner’s manual for open collector output.)
AUXILIARY POWER OUTPUT FOR THE WB-AVO –
Voltage Maximum Current
+10V 15mA
+12V 200mA
+5V 100mA
-12V 200mA
Power, except for 10 volts, is supplied dir ectly from the computer
power supply. The +10V supply draws its current fr om the +12V
supply.
WB-AVO Operator’s Manual
3 – 15
Page 37
WB-AVO OPERATOR’S MANUAL
GENERAL
Product Specifications
10 Volt Reference –
· Output Current: 15mA maximum
· Initial Accuracy: 9.9 to 10.1 volts
· Temperature Drift: 0.0008% / ºC maximum
· Drift with time: 0.003% / 1000 hours
General Specifications of the WB-AVO–
CONDITIONS
· Operating Temperature Ambient: 0 to 50ºC
· Board Dimensions:
The WB-AVO-2 is 4.2” x 5.25” (11.8 x 14.7 cm)
The WB-AVO-8 is 4.2” x 9.5” (11.8 x 14.7 cm)
· The supply current consumed by the WB-AVO varies accor ding
to number of analog output channels as well as voltage settings. (See table below for variations.)
WB-AVO POWER CONSUMPTION–
Voltage
Supply Current Consumed by
WB-AVO-2: WB-AVO-8:
+5V 320mA 320mA
+12V 40mA 65mA
-12V 15mA 15mA
Total 2.6 Watts 2.9 Watts
Chapter 3 Technical Notes
3 – 16
Page 38
WB-AVO OPERATOR’S MANUAL
Alphabetical Index of this Volume
Index – 0
Page 39
INDEX
A – D
A
Accuracy, 3-15
Acquisition speed, data, 1-3
Address, base
additive values of switches,
2-11
setting, 2-10 through 2-11
troubleshooting, 3-11
values to avoid, 2-11
Analog Connection Development
System, 1-2, 1-3, 1-4, 2-1, 2-2
Analog output channels, iv, 1-3
Analog input channel/terminal panel
calibration file
(CALIB.DAT), 3-5
Analog output channel calibration file
(CALOUT.DAT),
definition, 3-5
editing, 3-5 through 3-6
editing utility
(EDITCAL.EXE) 3-9
factory methods, 3-4
format, 3-7 through 3-8
reconstructing, 3-6, 3-9
Analog output ranges, 1-2, 2-6 through
2-7
Assignments (pin), 3-2
B
Base address
additive values of switches,
2-11
setting, 2-10
switch illustration, 2-3
troubleshooting, 3-11
values to avoid, 2-11
Block diagram of boards, 3-3
Board, disabling, 2-8
switch illustration, 2-3
troubleshooting, 3-11, 3-13
Boards, maximum, 1-2, 2-8
C
CALIB.DAT (analog input channel/
terminal panel calibration
file), 3-5
Calibration files
editing, 3-5 through 3-6
editing utility
(EDITCAL.EXE), 3-9
format, 3-7 through 3-8
reconstructing, 3-6, 3-9
Calibration numbers, 3-6, 3-8
label (on board), 2-3
Calibration, terminal panel, 3-7
CALOUT.DAT (analog output channel
calibration file)
definition, 3-5
editing utility
(EDITCAL.EXE) 3-9
factory methods, 3-4
format,3-7 through 3-8
reconstructing, 3-6, 3-9
Changing quantity of boards, 3-6
Connecting a terminal panel, 2-4
Current/Voltage switches, 2-1
setting, 2-6 through 2-7
switch illustration, 2-3
D
Data acquisition speed, iv, 1-3
Data presentation, 1-2
Digital input/output channels
characteristics, 1-3, 3-15
Disabling a board, 2-6
Board number, 2-2
setting, 2-8 through 2-9
WB-AVO Operator’s Manual
Index – 1
Page 40
WB-AVO OPERATOR’S MANUAL
E – Q
E
EEPROM, 3-5
EDITCAL (EDITCAL.EXE) calibration
file editing utility, 3-5
through 3-7, 3-9 through
3-11
F
Features of WB-AVO boards, iv
G
H
Hardware requirements, 1-4
Highlights of the WB-AVO, iv
I
Illustration of WB-AVO, 2-3
Installing the WB-AVO (physical
installation), 2-3 through 2-4
I/O channels (digital)
characteristics, 1-3, 3-15
M
Maximum
analog output channels (in an
installation), 1-2
boards, 1-2,
digital I/O lines (in an
installation), 1-2
resolution, iv, 3-14
speed, iv, 3-14
Multiple boards, 1-2, 2-2, 2-8 through
2-9, 3-12
N
O
Output channel (analog) calibration
file (CALOUT.DAT)
definition, 3-5
editing utility
(EDITCAL.EXE), 3-9
through 3-10
factory methods, 3-4
format, 3-7 through 3-8
reconstructing, 3-6, 3-9
Output (analog) ranges, 1-2, 3-14
setting (V/C switches), 2-6
through 2-7
J
K
L
Alphabetical Index of this Volume
Index – 2
P
Pin assignments (pinouts), 3-2
Q
Quantity of boards (changing), 3-6
QuickLog PC, 1-1, 1-2, 1-3, 1-4, 2-1,
2-2, 2-7
Page 41
INDEX
R – Z
R
Range (analog output), 1-2, 3-14
accuracy, 1-2
setting (V/C switches), 2-6
through 2-7
voltage, 1-2, 3-14
RECAL.EXE (recalibration utility), 3-4
Recalibration, 3-4
Reconstructing a lost calibration file,
3-5, 3-6, 3-9
Resolution, iv, 1-3, 3-14
S
Single board, 2-2, 2-8
Software requirements, 1-4
Specifications, 3-14 through 3-16
Speed, maximum, iv, 3-14
Stability, 3-15
Switches, base address, 2-3
additive values, 2-11
setting, 2-10
troubleshooting, 3-11
values to avoid, 2-11
Switches, board number, 2-2, 2-3
setting, 2-8 through 2-9
troubleshooting, 3-11, 3-13
Switches, voltage/current, 2-1
setting, 2-6 through 2-7
illustration, 2-3
Switch settings, verifying, 2-2
System requirements, 1-4
Troubleshooting
of installation, 3-11
of operation, 3-12
U
Using EDITCAL (calibration file
editing utility), 3-9
V
Voltage/current switches, 2-1
setting, 2-6 through 2-7
illustration, 2-3
W
WB-ASC, 3-5
WB-ASC16, 3-8
WB-AVO Illustration, 2-3
WB-FLASH12, 3-5
WB-WORKMATE, 3-5
WCAL, 3-7, 3-8
WorkBench PC for DOS or Windows,
1-1, 1-2, 1-3, 1-4, 2-1, 2-2,
2-7
X
XCAL, 3-7, 3-8
Y
T
Terminal panel
connection, 2-1, 2-4
Terminal panel/analog input channel
calibration file
(CALIB.DAT), 3-5
Terminate and stay resident (TSR),
3-11
YCAL, 3-7, 3-8
Z
ZCAL 3-7, 3-8
WB-AVO Operator’s Manual
Index – 3
Page 42
WB-AVO OPERATOR’S MANUAL
Alphabetical Index of this Volume
Index – 4
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