pico ADC-100
High speed Analog
to Digital Converter
User Manual
Version 1.2
by
M K Green
Pico Technology Limited
149-151 St Neots Road
Hardwick
Cambs CB3 7QJ
UK
Tel: 44-1954-211716
Fax: 44-1954-211880
E-Mail: mike@picotech.co.uk
Copyright 1994-1996 Pico Technology Limited
pico ADC-100
user manual
pico ADC-100
user manual
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Safety warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problems? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
5
6
7
6 Picolog support for ADC-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Edit ADC-100 setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Display Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Edit ADC-100 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Version 1.0 rev 3
Page i
Page ii
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Safety warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problems? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
5
6
7
6 Picolog support for ADC-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Edit ADC-100 setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Display Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Edit ADC-100 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Version 1.0 rev 3
Page i
Page ii
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
1 Introduction
The PICO ADC-100 is a high speed analog to digital converter with two
input channels and software controlled input ranges.
The unit is supplied with a range or ready-to-use Virtual Instrument and
data logging software: alternatively, you can use the ADC-100 driver
software to develop your own programs to collect and analyse data from
the unit. The software includes:
C
PicoScope for DOS and Windows: virtual instrument programs
which enable you to use the ADC-100 like an Oscilloscope,
Spectrum Analyser or Voltmeter
C
PicoLog (optional): DOS program to carry our data logging and
analysis
C
Clipboard: Windows program to collect data and write it to the
clipboard- you can then analyse the data using a spreadsheet
C
adc100.exe: DOS program to read in large amounts of data and
write it to a text file.
This manual describes the physical and electrical properties of the ADC100, and explains how to install the software. For information about the
software supplied with the unit, please refer to the following documents:
For all Pico ADCs, the ground input (BNC outer shell) is connected directly
to the ground of your computer. This is done in order to minimise
interference. As with most oscilloscopes, you should take care not to
connect the ground input of the ADC to anything which may be at some
voltage other than ground: doing so may cause damage to the ADC. If in
doubt, use a meter to check that there is no significant AC or DC voltage.
For computers that do not have an earth connection (for example laptops),
it must be assumed that the ADC-100 is not protected by an earth. For
such computers, we recommend that only class II (double insulated)
oscilloscope probes should be used.
The maximum input voltage range of the ADC-100 is ±20V. Any voltages
in excess of ±200V may cause permanent damage to the unit.
The unit contains no user serviceable parts: repair or calibration of the unit
requires specialised test equipment and must be performed by Pico
Technology Limited or their authorised distributors.
3 EMC
This instrument has been tested according to the requirements of the EMC
directive 89/336/EEC. Compliance was demonstrated by meeting the test
limits of the following standards:
Product
Document
PicoScope for DOS
PicoScope manual
PicoScope for Windows
PicoScope for Windows help file
PicoLog
PicoLog manual
Section 6 of this manual
ADC100 clipboard program
Clipboard help file
C
C
ADC100 drivers
Driver help file
or ADC100.ASC (text file)
Immunity
This product has demonstrated a satisfactory level of immunity in the field.
Emissions
EN50081-1(1992) Generic emission standard for residential, commercial
and light industry. Test methods used were:
EN55022 Conducted, class B
EN55022 Radiated, class B
2 Safety warning
Version 1.0 rev 3
Page 1
Page 2
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
1 Introduction
The PICO ADC-100 is a high speed analog to digital converter with two
input channels and software controlled input ranges.
The unit is supplied with a range or ready-to-use Virtual Instrument and
data logging software: alternatively, you can use the ADC-100 driver
software to develop your own programs to collect and analyse data from
the unit. The software includes:
C
PicoScope for DOS and Windows: virtual instrument programs
which enable you to use the ADC-100 like an Oscilloscope,
Spectrum Analyser or Voltmeter
C
PicoLog (optional): DOS program to carry our data logging and
analysis
C
Clipboard: Windows program to collect data and write it to the
clipboard- you can then analyse the data using a spreadsheet
C
adc100.exe: DOS program to read in large amounts of data and
write it to a text file.
This manual describes the physical and electrical properties of the ADC100, and explains how to install the software. For information about the
software supplied with the unit, please refer to the following documents:
For all Pico ADCs, the ground input (BNC outer shell) is connected directly
to the ground of your computer. This is done in order to minimise
interference. As with most oscilloscopes, you should take care not to
connect the ground input of the ADC to anything which may be at some
voltage other than ground: doing so may cause damage to the ADC. If in
doubt, use a meter to check that there is no significant AC or DC voltage.
For computers that do not have an earth connection (for example laptops),
it must be assumed that the ADC-100 is not protected by an earth. For
such computers, we recommend that only class II (double insulated)
oscilloscope probes should be used.
The maximum input voltage range of the ADC-100 is ±20V. Any voltages
in excess of ±200V may cause permanent damage to the unit.
The unit contains no user serviceable parts: repair or calibration of the unit
requires specialised test equipment and must be performed by Pico
Technology Limited or their authorised distributors.
3 EMC
This instrument has been tested according to the requirements of the EMC
directive 89/336/EEC. Compliance was demonstrated by meeting the test
limits of the following standards:
Product
Document
PicoScope for DOS
PicoScope manual
PicoScope for Windows
PicoScope for Windows help file
PicoLog
PicoLog manual
Section 6 of this manual
ADC100 clipboard program
Clipboard help file
C
C
ADC100 drivers
Driver help file
or ADC100.ASC (text file)
Immunity
This product has demonstrated a satisfactory level of immunity in the field.
Emissions
EN50081-1(1992) Generic emission standard for residential, commercial
and light industry. Test methods used were:
EN55022 Conducted, class B
EN55022 Radiated, class B
2 Safety warning
Version 1.0 rev 3
Page 1
Page 2
Version 1.0 rev 3
pico ADC-100
user manual
4 Specification
pico ADC-100
user manual
5 Installation
Resolution
12 bits
Number of input channels
2
Input voltage ranges
software selectable: ±20V, ±10V,
±5V, ± 2V, ±1V, ±500mV, ±200mV
[±100mV,±50mV accuracy not
guaranteed]
manually selectable: AC/DC
Maximum sampling rate
depends on computer:
120k samples per sec on 486/66
100k samples per sec on 386/33
30ksps on 8086/10
5.1 Package Contents
The ADC-100 package should contain the following items:
C
ADC-100 unit
C
25 way parallel cable
C
PicoScope diskette
C
ADC-100 manual
C
PicoScope for DOS manual
C
ADC-100 adapter (see section 7)
If you ordered PicoLog, the package will also contain the following items:
C
PicoLog diskette
C
PicoLog manual
Repeatability
±4lsb at 25EC
Absolute accuracy
±1% typical at 25EC
±3% worst case over operating
temperature range
Overvoltage protection
±200V
Input impedance
1MS
Input connectors
2xBNC
The Windows software creates a program group for Pico software and help
files: if you wish to use any part of the software under Windows, you
should therefore use the Windows installation program. If you only intend
to use the DOS software, you can use either installation program.
Output connector
25 way male D-type to computer
printer port
Installing under DOS
Power requirements
No power supply required
Environmental conditions
0 to 70EC
0 to 95% humidity
NOT water resistant
5.2 Software
The software diskette contains easy-to-use installation programs for DOS
and for Windows that takes you, step by step, through the process of
setting up the software.
1.
2.
3.
4.
Insert the software diskette into drive A
type A:INSTALL
press the Enter key
Follow the instructions given to you by the program
Installing under Windows
1.
2.
Version 1.0 rev 3
Page 3
Page 4
Insert the software diskette into drive A
Select File from the program manager main menu
Version 1.0 rev 3
pico ADC-100
user manual
4 Specification
pico ADC-100
user manual
5 Installation
Resolution
12 bits
Number of input channels
2
Input voltage ranges
software selectable: ±20V, ±10V,
±5V, ± 2V, ±1V, ±500mV, ±200mV
[±100mV,±50mV accuracy not
guaranteed]
manually selectable: AC/DC
Maximum sampling rate
depends on computer:
120k samples per sec on 486/66
100k samples per sec on 386/33
30ksps on 8086/10
5.1 Package Contents
The ADC-100 package should contain the following items:
C
ADC-100 unit
C
25 way parallel cable
C
PicoScope diskette
C
ADC-100 manual
C
PicoScope for DOS manual
C
ADC-100 adapter (see section 7)
If you ordered PicoLog, the package will also contain the following items:
C
PicoLog diskette
C
PicoLog manual
Repeatability
±4lsb at 25EC
Absolute accuracy
±1% typical at 25EC
±3% worst case over operating
temperature range
Overvoltage protection
±200V
Input impedance
1MS
Input connectors
2xBNC
The Windows software creates a program group for Pico software and help
files: if you wish to use any part of the software under Windows, you
should therefore use the Windows installation program. If you only intend
to use the DOS software, you can use either installation program.
Output connector
25 way male D-type to computer
printer port
Installing under DOS
Power requirements
No power supply required
Environmental conditions
0 to 70EC
0 to 95% humidity
NOT water resistant
5.2 Software
The software diskette contains easy-to-use installation programs for DOS
and for Windows that takes you, step by step, through the process of
setting up the software.
1.
2.
3.
4.
Insert the software diskette into drive A
type A:INSTALL
press the Enter key
Follow the instructions given to you by the program
Installing under Windows
1.
2.
Version 1.0 rev 3
Page 3
Page 4
Insert the software diskette into drive A
Select File from the program manager main menu
Version 1.0 rev 3
pico ADC-100
3.
4.
5.
6.
user manual
Select Run from the File menu
Type A:WINSTALL
Press the Enter key
Follow the instrunctions given to you by the program
pico ADC-100
user manual
To check that the unit is working, start up the PicoScope program.
PicoScope should now display the voltage that you have connected. If you
are using scope probes, when you touch the scope probe tip with your
finger, you should see a small 50Hz mains signal on the screen.
5.3 Hardware
5.4 Problems?
To use the ADC-100, you should connect the D-connector on the ADC-100
to the printer port on your computer using the cable provided. Next,
connect a voltage source to one or both of the BNC connectors. The ADC100 has the same connectors as an oscilloscope, so you can use standard
oscilloscope probes. The input impedance is also the same, so the x10
function on a scope probe works correctly.
The ADC-100 driver help file (adc100.hlp or adc100.asc) contains useful
hints and tips for diagnosing problems with the ADC-100.
The ADC-100 works correctly on most computers, however some
computers (mainly laptops) have non-standard printer ports.
For portable computers with this problem, it is necessary to use a special
adaptor which plugs into the cable between the computer and the ADC100. This adaptor is supplied with the ADC-100. The software
automatically detects that the adaptor is fitted.
For desktop computers with this problem, you can also use the adapter,
but it may be easier to fit an extra printer port to your computer. Pico can
supply a very economical printer port card which is guaranteed to work with
the ADC-100.
There is a switch next to each BNC connector: with the switch down, the
ADC-100 can measure DC voltages on the BNC next to it. With the switch
up, it measures only AC voltages.
Version 1.0 rev 3
Page 5
Page 6
Version 1.0 rev 3
pico ADC-100
3.
4.
5.
6.
user manual
Select Run from the File menu
Type A:WINSTALL
Press the Enter key
Follow the instrunctions given to you by the program
pico ADC-100
user manual
To check that the unit is working, start up the PicoScope program.
PicoScope should now display the voltage that you have connected. If you
are using scope probes, when you touch the scope probe tip with your
finger, you should see a small 50Hz mains signal on the screen.
5.3 Hardware
5.4 Problems?
To use the ADC-100, you should connect the D-connector on the ADC-100
to the printer port on your computer using the cable provided. Next,
connect a voltage source to one or both of the BNC connectors. The ADC100 has the same connectors as an oscilloscope, so you can use standard
oscilloscope probes. The input impedance is also the same, so the x10
function on a scope probe works correctly.
The ADC-100 driver help file (adc100.hlp or adc100.asc) contains useful
hints and tips for diagnosing problems with the ADC-100.
The ADC-100 works correctly on most computers, however some
computers (mainly laptops) have non-standard printer ports.
For portable computers with this problem, it is necessary to use a special
adaptor which plugs into the cable between the computer and the ADC100. This adaptor is supplied with the ADC-100. The software
automatically detects that the adaptor is fitted.
For desktop computers with this problem, you can also use the adapter,
but it may be easier to fit an extra printer port to your computer. Pico can
supply a very economical printer port card which is guaranteed to work with
the ADC-100.
There is a switch next to each BNC connector: with the switch down, the
ADC-100 can measure DC voltages on the BNC next to it. With the switch
up, it measures only AC voltages.
Version 1.0 rev 3
Page 5
Page 6
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
6 Picolog support for ADC-100
6.2 Display Voltages
This section covers the functions of PicoLog which are specific to the ADC100. It describes:
C
C
C
?4444444UDISPLAY ADC-100 VALUES 4444444@
*
Ch A
Ch B
*
*
ADC counts:
545
545
*
*
DC volts:
0.665
0.665
*
*
AC volts:
0.301
0.003
*
*
dB
-1.65
-1.65
*
*
Frequency
135.5
14735.5
*
B44444444444444444444444444444444444444A
edit ADC-100 setup: specify which printer port the ADC-100 is
connected to
Display voltages: display the parameters that can be measured
using the ADC-100
Add or edit channel: specify details for a channel
This option shows you each of the values that you could measure using the
ADC-100.
6.1 Edit ADC-100 setup
?4444UEDIT ADC-100 SETUP 4444@
*
*
* Printer port:
LPT1
*
*
*
B4444444444444444444444444444A
Press Escape to return to the main menu.
6.3 Edit ADC-100 channel
This option is used to specify which printer port the ADC-100 is connected
to. The ports must be LPT1..LPT4.
Version 1.0 rev 3
Page 7
?444444U EDIT ADC-100 CHANNEL W44444444444@
*
*
* Channel:
A
*
*
*
* Name:
Inlet temp
*
*
*
* Heading line 1:
Inlet
*
* Heading line 2:
Temp
*
*
*
* Voltage range:
±20V
*
*
*
* Measurement mode:
ADC counts
*
* Min frequency:
100 Hz
*
*
*
* No of readings:
10
*
* Combination method:
Average
*
*
*
* Total measurement time: 2500 ms
*
*
*
B44444444444444444444444444444444444444444A
Page 8
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
6 Picolog support for ADC-100
6.2 Display Voltages
This section covers the functions of PicoLog which are specific to the ADC100. It describes:
C
C
C
?4444444UDISPLAY ADC-100 VALUES 4444444@
*
Ch A
Ch B
*
*
ADC counts:
545
545
*
*
DC volts:
0.665
0.665
*
*
AC volts:
0.301
0.003
*
*
dB
-1.65
-1.65
*
*
Frequency
135.5
14735.5
*
B44444444444444444444444444444444444444A
edit ADC-100 setup: specify which printer port the ADC-100 is
connected to
Display voltages: display the parameters that can be measured
using the ADC-100
Add or edit channel: specify details for a channel
This option shows you each of the values that you could measure using the
ADC-100.
6.1 Edit ADC-100 setup
?4444UEDIT ADC-100 SETUP 4444@
*
*
* Printer port:
LPT1
*
*
*
B4444444444444444444444444444A
Press Escape to return to the main menu.
6.3 Edit ADC-100 channel
This option is used to specify which printer port the ADC-100 is connected
to. The ports must be LPT1..LPT4.
Version 1.0 rev 3
Page 7
?444444U EDIT ADC-100 CHANNEL W44444444444@
*
*
* Channel:
A
*
*
*
* Name:
Inlet temp
*
*
*
* Heading line 1:
Inlet
*
* Heading line 2:
Temp
*
*
*
* Voltage range:
±20V
*
*
*
* Measurement mode:
ADC counts
*
* Min frequency:
100 Hz
*
*
*
* No of readings:
10
*
* Combination method:
Average
*
*
*
* Total measurement time: 2500 ms
*
*
*
B44444444444444444444444444444444444444444A
Page 8
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
The channel name will appear on parameter menus. The two lines of
heading will appear in the headings of tabulation reports.
The voltage range is the input voltage range for the ADC channel.
The measurement mode can be one of ADC counts, Volts, AC volts, DC
volts, frequency or dB. ADC counts and Volts are instantaneous
measures: the others are based on a number of measurements
dependent on the minumum frequency.
The min frequency specifies the number of measurements to be taken
for AC and DC volts, frequency and dB measurements. The lower the
minimum frequency, the longer the time for each sample.
The number of readings specifies how many readings will be taken for
this channel for each sample. The combination method defines how the
readings will be combined to form a sample. It can be minimum,
maximum or average. Average is useful to reduce the effects of noise:
Minimum and Maximum can be used to identify extreme values during the
sample interval.
The total measurement time is the total time to collect all the readings for
this sample: it must be less than the sample interval.
Version 1.0 rev 3
Page 9
Page 10
Version 1.0 rev 3
pico ADC-100
user manual
pico ADC-100
user manual
The channel name will appear on parameter menus. The two lines of
heading will appear in the headings of tabulation reports.
The voltage range is the input voltage range for the ADC channel.
The measurement mode can be one of ADC counts, Volts, AC volts, DC
volts, frequency or dB. ADC counts and Volts are instantaneous
measures: the others are based on a number of measurements
dependent on the minumum frequency.
The min frequency specifies the number of measurements to be taken
for AC and DC volts, frequency and dB measurements. The lower the
minimum frequency, the longer the time for each sample.
The number of readings specifies how many readings will be taken for
this channel for each sample. The combination method defines how the
readings will be combined to form a sample. It can be minimum,
maximum or average. Average is useful to reduce the effects of noise:
Minimum and Maximum can be used to identify extreme values during the
sample interval.
The total measurement time is the total time to collect all the readings for
this sample: it must be less than the sample interval.
Version 1.0 rev 3
Page 9
Page 10
Version 1.0 rev 3
pico ADC-100
Version 1.0 rev 3
user manual
Page 11