Dataq DI-2108 User manual
The way PC-based instrumentation should be
DI-2108
8-Channel High Speed USB Data Acquisition System with Stand-alone Capability
User's Manual
Manual Revision E
Copyright © 2019 by DATAQ Instruments, Inc. The Information contained herein is the exclusive property of
DATAQ Instruments, Inc., except as otherwise indicated and shall not be reproduced, transmitted, transcribed, stored
in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic,
mechanical, magnetic, optical, chemical, manual, or otherwise without expressed written authorization from the com-
pany. The distribution of this material outside the company may occur only as authorized by the company in writing.
DATAQ Instruments' hardware and software products are not designed to be used in the diagnosis and treatment of
humans, nor are they to be used as critical components in any life-support systems whose failure to perform can rea-
sonably be expected to cause significant injury to humans.
DATAQ, the DATAQ logo, and WINDAQ are registered trademarks of DATAQ Instruments, Inc. All rights reserved.
DATAQ Instruments, Inc.
241 Springside Drive
Akron, Ohio 44333 U.S.A.
Telephone: 330-668-1444
Fax: 330-666-5434
Designed and manufactured in the
United States of America
iii
Warranty and Service Policy
Product Warranty
DATAQ Instruments, Inc. warrants that this hardware will be free from defects in materials and workmanship under
normal use and service for a period of 90 days from the date of shipment. DATAQ Instruments' obligations under this
warranty shall not arise until the defective material is shipped freight prepaid to DATAQ Instruments. The only
responsibility of DATAQ Instruments under this warranty is to repair or replace, at its discretion and on a free of
charge basis, the defective material.
This warranty does not extend to products that have been repaired or altered by persons other than DATAQ Instru-
ments employees, or products that have been subjected to misuse, neglect, improper installation, or accident.
DATAQ Instruments shall have no liability for incidental or consequential damages of any kind arising out of the
sale, installation, or use of its products.
Service Policy
1. All products returned to DATAQ Instruments for service, regardless of warranty status, must be on a freight-pre-
paid basis.
2. DATAQ Instruments will repair or replace any defective product within 5 days of its receipt.
3. For in-warranty repairs, DATAQ Instruments will return repaired items to the buyer freight prepaid. Out of war-
ranty repairs will be returned with freight prepaid and added to the service invoice.
DI-2108 Hardware Manual
Table of Contents
v
Table of Contents
Warranty and Service Policy ................................................................................................................ iii
1. Introduction ........................................................................................................................................ 1
Features .............................................................................................................................................. 1
Analog Inputs .................................................................................................................................... 1
Digital I/O .......................................................................................................................................... 1
Software ............................................................................................................................................. 1
WinDaq® Recording and Playback Software ............................................................................ 2
Help ............................................................................................................................................. 2
2. Specifications ...................................................................................................................................... 3
3. Installation .......................................................................................................................................... 7
Install WinDaq Software ................................................................................................................... 7
Connect the Instrument to Your Computer ....................................................................................... 8
4. Controls, Indicators, and Connections ............................................................................................. 9
Mini-B USB Connection ................................................................................................................... 9
Screw Terminals ................................................................................................................................ 9
DI-2108 Signal Connections ....................................................................................................... 9
Connecting Signal Leads ............................................................................................................ 10
Analog Inputs .............................................................................................................................. 11
Low-pass Filter ..................................................................................................................... 12
Resolution as a Function of Sample Rate ............................................................................. 13
Digital Ports ................................................................................................................................ 14
WinDaq Remote Events (D0 Event) .................................................................................... 15
WinDaq Remote Storage (D1 Record) ................................................................................. 17
WinDaq Rate (D2 Rate) ....................................................................................................... 17
WinDaq Counter (D3 Count) ............................................................................................... 19
General Purpose Digital Inputs ............................................................................................ 21
General Purpose Digital Outputs .......................................................................................... 22
4-20mA Current Loop Measurements ............................................................................................... 23
LED Indicator .................................................................................................................................... 24
USB Drive Port .................................................................................................................................. 25
Control Button ................................................................................................................................... 25
Record Data to USB Thumb Drive ............................................................................................. 25
Stop Recording to USB Thumb Drive ........................................................................................ 26
Fix Errors .................................................................................................................................... 26
Switching between LibUSB and CDC Modes ............................................................................ 26
Save Ethernet and Stand-alone configuration to Thumb Drive .................................................. 26
Apply Ethernet and Stand-alone Configuration to Device ......................................................... 27
WinDaq Dashboard ........................................................................................................................... 27
5. Unlock WinDaq and Stand-alone Operation ................................................................................... 29
6. Dimensional Drawing ......................................................................................................................... 31
DI-2108 Hardware Manual
Introduction
1
1. Introduction
This manual contains information designed to familiarize you with the features and functions of the DI-2108 USB
data acquisition system.
Features
The DI-2108 data acquisition instrument is a portable data recording module that communicates through your com-
puter's USB port. Power is derived from the interface port so no external power is required. Features include:
• 8 fixed differential analog inputs protected to ±100V (transient).
• 7 digital ports protected to +25V: Two dedicated for WINDAQ remote control operations; One dedicated to
WINDAQ rate measurements; and One dedicated to WINDAQ counter measurements.
• ±10V full scale measurement range.
• Up to 220 kHz maximum throughput sampling rate with all eleven channels enabled (analog, digital, frequency,
counter.).
• A push-button to tag remote events in WINDAQ software.
• LED indication for easy notification of system status.
• Free WinDaq/Lite data acquisition recording software. Records up to four channels of data. Purchase an unlock
code to record more than four channels.
• Stand-alone option allows the user to configure a recording session through their PC then record data in the field
to removable flash memory via the USB drive port (without being connected to their PC). Stand-alone data log-
ging requires Unlock code to record more than 1 channel to removable flash memory.
• Low-pass filter per analog channel with automatic corner frequency selection.
• Dedicated counter channel.
• Dedicated frequency channel.
Analog Inputs
The DI-2108 features eight differential channel inputs located on a single sixteen-position screw terminal block for
easy connection and operation. Note: The DI-2108 does not support Gain.
Utilize the functionality of WINDAQ software to experience all the features encased in these small, inexpensive
instruments. Unlock code required to record all eight channels.
Digital I/O
The DI-2108 contains seven digital ports, which may be used as a general-purpose digital inputs or for a specific
function as designated on the device. Digital port D0 is reserved for WinDaq Events; Digital port D1 is reserved for
WinDaq remote Start/Stop; Digital port D2 is reserved for rate measurements; Digital port D3 is reserved for counts;
Digital port D6 is reserved for external triggers. Please Note: Digital outputs are not supported in WinDaq software.
Each port may be configured as a switch using third-party software.
Software
All software required to record and playback waveforms is included with the purchase of any DI-2108 data acquisi-
tion system via download.
DI-2108 Hardware Manual
Introduction
2
WINDAQ®Recording and Playback Software
WINDAQ Acquisition and WINDAQ Waveform Browser allow you to record and playback data acquired through your
instrument. WINDAQ software is an invaluable resource to record and analyze your data and is available for free from
our web site (www.dataq.com).
WINDAQ Lite Data Acquisition software (free) can be used to record waveforms directly and continuously to disk
while monitoring a real time display of the waveforms on-screen. It operates, displays, and records up to four chan-
nels in real time. An optional unlock code is available to record the rest of the channels on the device.
WINDAQ Waveform Browser playback software (also known as “WWB”) offers an easy way to review and analyze
acquired waveforms. A built-in data file translator allows the user to display multiple waveforms acquired by
WINDAQ Acquisition software or any of a wide range of data acquisition packages. The software’s disk-streaming
design allows data files of any length to be graphically displayed rapidly, in normal or reverse time directions. Seven
standard cursor-based measurements, frequency domain, and statistical analysis functions help simplify waveform
analysis and interpretation. WINDAQ Waveform Browser is free and installed when installing WINDAQ Software.
Help
All WINDAQ software utilizes context-sensitive help. Help may be accessed through the Help menu or by pressing
the F1 key with any pull-down menu item selected. This will take you directly to the Help topic most relevant to that
particular function or feature. Help topics discuss in detail each function available in the software.
DI-2108 Hardware Manual
Specifications
3
2. Specifications
Analog Inputs
Number of Channels: 8
Channel Configuration: Differential
Voltage Measurement Range: ±10V Full Scale
Input impedance: 110k
Dc accuracy: ±5 mV at 16-bit resolution and 25°C, excluding common mode error
Absolute maximum input without damage:
±100 V dc or peak ac (normal mode + common mode)
Common mode range: ±20 V dc or peak ac
Common mode rejection ratio: 80 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection: -80 dB
Digital Ports
Number of Ports: 7
Type: MOSFET switch
Configuration: Programmable as digital input or switch
Pull-up value: 4.7 k
Input high voltage threshold: 2.4V
Input low voltage threshold: 0.8V
Absolute maximum applied voltage (V): +25V
Reserved Digital Inputs
Port 1: WINDAQ remote events
Port 2: WINDAQ remote start/stop
Port 3: Rate input
Port 4: Count input
ADC Characteristics
Resolution: 12- to 16-bit
Above zero ADC counts: 2,047 to 32,767
Below zero ADC counts: 2,048 to 32,768
Max. sample throughput rate: Standard: 220,000 Hz (160 kHz for analog chs, 20 kHz per digital ch)
Stand-alone: 20 kHz to 160 kHz (dependent on flash memory)
Min. sample throughput rate: Standard: 20 Hz (2.2 samples per hour with WinDaq)
Stand-alone: 0.0017 Hz
Sample rate timing accuracy: 50 ppm
Digital Ports Programmed as Switch
Maximum drain voltage: 25V
Maximum sink current: 100 mA
DI-2108 Hardware Manual
Specifications
4
Count/Rate
Digital port assignment: Count: Port 2 configured as input
Rate: Port 3 configured as input
Internal pull-up value: 4.7 k
Input high voltage threshold: 2.4V
Input low voltage threshold: 0.8V
Terminal count: 65,535
Maximum rate frequency: 50 KHz with one enabled channel, 20 KHz with 2-4 enabled analog
channels, otherwise 10 KHz
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
Removable Memory
Type: MLC, pSLC, or SLC flash memory (with USB SD card reader); USB
thumb drive
Required Format: FAT32
Number of Channels: 1; Unlock code required for 2 or more
Indicators and Connections
Interface: USB 2.0 (mini-B style connector)
Indicator light: Multi-color LED
USB A Connector (Drive): USB drive for Stand-alone data logging
Cannot be used concurrently with the USB interface
Input connections: Two 16-position screw terminal strips
Power
Power Consumption: <1.0 Watt, via USB interface
Environmental
Operating Temperature: 0°C to 50°C (32°F to 122°F)
Operating Humidity: 0 to 90% non-condensing
Storage Temperature: -20°C to 60°C (-4°F to 140°F)
Storage Humidity: 0 to 90% non-condensing
Physical Characteristics
Enclosure: Polycarbonate ABS, 0.080 inch thickness
Mounting: Desktop; bulkhead
Dimensions: 6.68D × 3.28W × 1.13H in.
(169.67D × 83.31W × 28.7H cm.)
Weight: 5.7 oz. (162 grams)
DI-2108 Hardware Manual
Installation
7
3. Installation
The following items are included with each DI-2108 USB Data Acquisition System. Verify that you have the follow-
ing:
• A DI-2108 USB data acquisition instrument.
• 6-foot USB cable.
• A DATAQ Instruments screwdriver for signal lead connections.
• A USB flash drive with WinDaq software. Can also be used for stand-alone data logging.
If an item is missing or damaged, call DATAQ Instruments at 330-668-1444. We will guide you through the appropri-
ate steps for replacing missing or damaged items. Save the original packing material in the unlikely event that your
unit must, for any reason, be sent back to DATAQ Instruments.
Install WINDAQ Software
All software for the DI-4718B can be installed via a download-able executable directly from the DATAQ Instruments
web site. The software is also available on the provided USB flash drive.
1. Disconnect all DATAQ Instruments USB devices from your Computer.
2. Plug the USB flash drive into your computer’s USB port or Go to http://run.dataq.com to download the software.
3. Save the executable (Dataq Software Suite Web Setup.exe) to your local hard drive.
4. Double-click on the executable to extract the program and begin software installation.
5. Follow the on-screen prompts and enter all required information.
DI-2108 Hardware Manual
Installation
8
6. Software installation is complete - you will now see a “Successful Installation” box - click OK to exit WINDAQ
Installation.
You can now plug the device(s) into your PC. Click on the appropriate program group (specified above — default is
Start > Programs > WINDAQ) and click on “DATAQ Instruments Hardware Manager” to access WINDAQ software.
Connect the Instrument to Your Computer
DI-2108 instruments can be connected to your computer’s USB port using the provided USB cable. No external
power is required. Connect one end of the communications cable to the instrument port and the other to your PC’s
port. Click on the desktop shortcut icon labeled WinDaq Dashboard or click on the appropriate program group (spec-
ified above — default is Start > Programs > WINDAQ) and click on “WinDaq Dashboard” to access your device.
Note: Use a powered USB hub or a USB port on your PC. Non-powered USB hubs may not have sufficient power to
run the instrument.
DI-2108 Hardware Manual
Controls, Indicators, and Connections
9
4. Controls, Indicators, and
Connections
Mini-B USB Connection
Use the supplied USB cable to connect and power the instrument through your computer’s USB port.
Screw Terminals
All input signal connections are made to the 16-port screw terminals. Each terminal is labeled on the instrument case.
DI-2108 Signal Connections
Refer to the following for screw terminal port identification.
Ch#: Analog channels 1-8 (±10VFS, ±100V transient max.)
Status
D0 D1 D2 D3 D4 D5 D6
Model DI-2108
USB
Button
+5V GnD
CH8
CH7CH6
CH5CH4CH3CH2CH1
±100V Max
0-25V Max
CountRateRecordEvent
Drive
www.dataq.com
±10V F.S.
Analog In Channels 1-8
Digital Ports 0-6
Even Marker
Push Button
Activity LED
+5V Out Ground
Mini-B USB
Connection
Bulkhead
mounting ear
Bulkhead
mounting ear
USB Drive
Status
D0 D1 D2 D3 D4 D5 D6
Model DI-2108
USB
Button
+5V GnD
CH8
CH7CH6
CH5CH4CH3CH2CH1
±100V Max
0-25V Max
CountRateRecordEvent
Drive
www.dataq.com
±10V F.S.
DI-2108 Hardware Manual
Controls, Indicators, and Connections
10
D#: Digital port (0-6). Can also be used for specific WINDAQ functions (+25 Vmax).
D0 Event — WINDAQ Remote Event Marker (or general-purpose)
D1 Record — WINDAQ Remote Start/Stop (or general-purpose)
D2 Rate — Rate Input (or general-purpose)
D3 Count — Counter Input (or general-purpose)
D4 and D5 — General-purpose digital ports
D6 Ext Trig — External Trigger (or general-purpose)
+5V: +5V out. Max current = 100mA.
GnD: Ground.
Connecting Signal Leads
Connect signal leads to the DI-2108:
1. Insert the stripped end of a signal lead into the desired terminal directly under the screw.
2. Tighten the pressure flap by rotating the screw clockwise with a small screwdriver. Make sure that the pressure
flap tightens only against the signal wire and not the wire insulation. Do not over-tighten.
3. Tug gently on the signal lead to ensure that it is firmly secured.
When an input signal is connected and WINDAQ Acquisition software is run, WINDAQ’s real time display immedi-
ately reveals the input waveform on your computer’s monitor.
DI-2108 Hardware Manual
Controls, Indicators, and Connections
11
Analog Inputs
Eight fixed differential analog inputs measure ± 10V (CH1 to CH8). Designed to withstand ±100 V dc or peak ac.
Use the following diagram to connect Analog Input Channel 1.
100K
Ref
AIN
100K
10K
10K
AIN
Status
D0 D1 D2 D3 D4 D5 D6
Model DI-2108
USB
Button
+5V GnD
CH8
CH7CH6
CH5CH4CH3CH2CH1
±100V Max
0-25V Max
CountRateRecordEvent
Drive
www.dataq.com
±10V F.S.
Signal + Signal -
DI-2108 Hardware Manual
Controls, Indicators, and Connections
12
Low-pass Filter
Each analog channel employs a low-pass filter with automatic corner frequency selection. The filter is a CIC (cas-
caded integrator comb) type that uses as many as 512 samples per channel to calculate in real time as data is acquired.
Filter response is optimized when sampling frequency is set to ten times the highest frequency of interest.
When choosing an acquisition method in WinDaq (menu item Edit > Channel Settings) Last Point, Maximum, and
Minimum turn the filter off. The DI-2108 calculates its own Last Point, Maximum, Minimum, and Filter data making
it available at the programming level. Acquisition methods “RMS” and “Frequency” are permanently disabled for the
DI-2108, as are Input Types “Nonlinear” and “Thermocouple” and selections for “Unipolar” and “Fahrenheit.”
DI-2108 Hardware Manual
Controls, Indicators, and Connections
13
Resolution as a Function of Sample Rate
The resolution of the DI-4718B is a function of sample rate. The lower the sample rate the higher the resolution. ADC
resolution (R) is a function of selected sample rate per channel (F), and the number of enabled analog channels (C):
C Enabled Channels
11
22
43-4
85-8
DI-2108 Hardware Manual
Controls, Indicators, and Connections
14
Digital Ports
The DI-2108 contains 7 general-purpose digital ports. Each digital port can be configured as a digital input or used as a
switch to control an external load (up to 25 V and 100 mA). Many of the ports also provide specific functionality in
WINDAQ or a third-party program.
D0 Event is for WINDAQ Remote Events. This bit inserts an event marker in your data.
D1 Record is for WINDAQ Remote Storage. This bit can be programmed to begin recording data.
D2 Rate is for Rate measurements: 10Hz to 50kHz.
D3 Count is for Counter/Timer measurements up to 65,536.
D6 Ext Trig is for third-party external triggers.
Equivalent Digital I/O Circuit:
Dig In Dx
Dx
10
4.7K
+5
4.7K
Control
3.3V
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