Dataq DI-2008 User manual

The way PC-based instrumentation should be
DI-2008
8-Channel USB Voltage and Thermocouple Data Acquisition System
User's Manual
Manual Revision C
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: [phone]
Fax: [phone]
Designed and manufactured in the
United States of America

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 1 year 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-2008 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 ............................................................................................................................................. 2
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-2008 Signal Connections ....................................................................................................... 10
Connecting Signal Leads ............................................................................................................ 10
Analog Inputs .............................................................................................................................. 11
Gain Settings for Voltage Measurements ................................................................................... 12
Thermocouple Measurements ..................................................................................................... 13
Digital Ports ................................................................................................................................ 14
WinDaq Remote Events (D0 Event) .................................................................................... 14
WinDaq Remote Storage (D1 Record) ................................................................................. 16
WinDaq Rate (D2 Rate) ....................................................................................................... 16
WinDaq Counter (D3 Count) ............................................................................................... 18
General Purpose Digital Inputs ............................................................................................ 20
General Purpose Digital Outputs .......................................................................................... 21
4-20mA Current Loop Measurements ............................................................................................... 22
LED Indicator .................................................................................................................................... 23
ChannelStretch™ ............................................................................................................................... 23
Connection .................................................................................................................................. 23
Channel Selection ....................................................................................................................... 24
Sample Rate ....................................................................................................................................... 26
5. Unlock WinDaq .................................................................................................................................. 27
6. Dimensional Drawing ......................................................................................................................... 29

DI-2008 Hardware Manual
Introduction
1
1. Introduction
This manual contains information designed to familiarize you with the features and functions of the DI-2008 Voltage,
Thermocouple, and Pulse USB data acquisition system.
Features
The DI-2008 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 and isolated analog inputs protected to 120V rms.
• 7 digital I/O ports protected to +30V.
• 16-bit measurement resolution.
• Per channel programmable measurement ranges of ±10, ±25, ±50, ±100, ±250, ±500mV; ±1, ±2.5, ±5, ±10, ±25,
±50 Volts or Thermocouple types J, K, T, B, R, S, E, and N.
• Built-in cold junction compensation automatically enabled for any channel programmed as a thermocouple.
• Sample rates from as high as 2 kHz (for a single channel) to as low as 1 sample every 2.5 hours.
• A push-button to tag remote events in WINDAQ software.
• LED indication for easy notification of device status.
• Free WinDaq/Lite provides access to all instrument features. WinDaq/Unlock required per instrument to operate
multiple units using ChannelStretch™*
• ChannelStretch™ Technology allows you to sync up to 16 units (requires unlock code for each device)
• Counter channel (terminal count of 65535).
• Frequency channel (10 Hz to 50 kHz full scale across 12 programmable ranges).
• 15V excitation power supply output to power external sensors.
• Included .Net Class supports programming the DI-2008 under any .Net programming language.*
• Fully documented instrument protocol for programming the device in operating systems other than Windows.*
*ChannelStretch requires that each device be unlocked when used with WinDaq software. WinDaq unlock is not
required for ChannelStretch if programming devices using the .Net class or instrument protocol.
Analog Inputs
The DI-2008 features eight isolated differential channel inputs located on the sixteen-position screw terminal blocks
for easy connection and operation. Each channel can be programmed to acquire data as Voltage (±10, ±25, ±50, ±100,
±250, ±500mV; ±1, ±2.5, ±5, ±10, ±25, ±50 Volts) or Thermocouple temperature (types J, K, T, B, R, S, E, and N are
supported).
Utilize the functionality of WINDAQ software to experience all the features encased in these small, inexpensive
instruments. Unlock code required to expand channel count using the ChannelStretch feature.
Digital I/O
The DI-2008 contains seven digital ports that may each be used as a general-purpose digital input or for a specific
function as designated on the device. Digital port D0 may be used for WinDaq Events; Digital port D1 may be used
for WinDaq remote Start/Stop; Digital port D2 may be used for rate measurements; Digital port D3 may be used for

DI-2008 Hardware Manual
Introduction
2
counts; Digital ports D4-D6 are general-purpose digital input ports. Please Note: Digital outputs are not supported in
WinDaq software. Each port may be configured as a switch using your own program.
Software
All software required to record and playback waveforms is included with the purchase of any DI-2108-P data acqui-
sition system via download.
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 all channels in
real time. An optional unlock code is available to allow you to synchronize multiple units and expand channel count
using ChannelStretch.
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 par-
ticular function or feature. Help topics discuss in detail each function available in the software.

DI-2008 Hardware Manual
Specifications
3
2. Specifications
Analog Inputs
Number of Channels: 8
Channel Configuration: Differential, Isolated
Programmable measurements per channel: Voltage, Thermocouple
Programmable thermocouple types and measure-
ment range per channel:
Over 25 ±3 °C ambient temperature range.
Stable ambient temperature.
Following 30 minutes warm-up.
Excluding common mode error.
Excluding thermocouple error.
TC Type Range (°C) Accuracy (°C)
J -190 to 1200 ±(0.1% of span + 2)
K -180 to 1360
T -190 to 400 ±(0.1% of span + 1)
B600 to 1000 ±(0.2% of span + 4)
1001 to 1810 ±(0.1% of span + 3)
R-40 to 300 ±(0.2% of span + 6)
301 to 1760 ±(0.1% of span + 3)
S-40 to 400 ±(0.2% of span + 6)
401 to 1750 ±(0.1% of span + 3)
E -160 to 990 ±(0.1% of span + 1)
N
-170 to 50 ±(0.1% of span + 3)
51 to 1290 ±(0.1% of span + 1)
Programmable voltage measurements ranges per
channel:
At 25 °C ambient temperature.
Following 30 minutes warm-up.
Excluding common mode error.
Range (±) Accuracy
10 mV
±(0.05% of range + 10 µV)
25 mV
50 mV
100 mV
250 mV
500 mV
1 V
2.5 V
5 V
10 V
25 V
50 V
Input impedance: 1 M all ranges
Isolation: Input-to-output, Channel-to-channel
Absolute max input without damage: 120 Vrms

DI-2008 Hardware Manual
Specifications
4
Maximum common mode voltage: 120 Vrms
Minimum common mode rejection (330  unbalance): >110 dB (DC to 60 Hz)
Channel-to-channel crosstalk rejection:
(Rsource ≤ 330 Ω; Freqsource ≤ 60 Hz)
> 100 dB
Digital Ports
Number of ports: 7
Type: MOSFET switch
Configuration: Programmable as an input or switch
Pull-up value: 4.7 k
Isolation: None
Input high voltage threshold: 2.4 V minimum
Input low voltage threshold: 0.8 V maximum
Absolute maximum input without damage: ±30 V peak
Count/Rate
Digital port assignment: Count: Port 2 as input; Rate: Port 3 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
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
ADC Characteristics
Voltage measurement resolution: Range (±) Resolution Units
10 mV 0.305
V
25 mV 0.763
50 mV 1.53
100 mV 3.05
250 mV 7.63
500 mV 15.26
1 V 30.5
2.5 V 76.3
5 V 152.6
10 V 305
25 V 763
50 V 1.53 mV

DI-2008 Hardware Manual
Specifications
5
Minimum temperature measurement resolution: TC Type Resolution Units
J 0.086
°C
K 0.096
T 0.037
B 0.096
R/S 0.111
E 0.073
N 0.092
4-20 mA current loop resolution:
(5 VFS range with 250 shunt resistor)
13,100 ADC counts over the 4-20 mA range
Maximum sample throughput rate: Single enabled channel: 2 kHz
Two or more enabled channels: 200 Hz
Minimum sample throughput rate:
(Hardware)
1 enabled analog channel: 0.000109 Hz (1 sample every
9141.99 sec.)
2 or more enabled analog channels: 0.000011 Hz (1 sample
every 91419.93 sec.)
Minimum sample throughput rate:
(with WinDaq software)
.0001969 Hz
Sample rate timing accuracy: 50 ppm
Indicators, Connections, Controls
Interface: USB 2.0 (mini-B style connector)
Indicators (LED): Power, Active, Event
Input connections: Two 16-position terminal strips
Push button: Manual event when used with WinDaq software
Environmental
Operating temperature range: 0 to 70 °C
CJC range: -20 to 80 °C
Storage temperature: -20 to 80 °C
Storage humidity: 0 to 90 %RH, non-condensing
ChannelStretch™*
WinDaq software: If any synced device has two or more enabled analog channels, all
synced devices must enable the same number of analog and digital
channels and the same sample throughput rate. If all synced devices
have one or zero enabled analog channels, sample rate per channel
must be the same across all devices.
Programmed (.Net- or protocol-based): Sample rate per channel must be the same across all synced
devices.
*One or more digital ports configured as a discrete input counts as one digital channel. Rate and count inputs count
as one digital channel each.

DI-2008 Hardware Manual
Specifications
6
Power
Excitation output: +15 V dc (-7.5% to +2.5%) at 70% load (47 mA), 67 mA at full load
Power consumption from USB port: 0.75 Watts
Physical Characteristics
Enclosure: Hardened Plastic
Mounting: Desktop; bulkhead
Dimensions: 6.68W × 3.28D × 1.13H in.
(169.67W × 83.13D × 28.7H cm.)
Weight: 5.7 ounces (162 grams)
Software
WinDaq software: Click for supported operating systems
Programming: DATAQ Instruments Dot Net SDK, Instrument protocol, DLL,
and ActiveX Control

DI-2008 Hardware Manual
Installation
7
3. Installation
The following items are included with each DI-2008 USB Data Acquisition System. Verify that you have the follow-
ing:
• A DI-2008 USB data acquisition instrument.
• 6-foot USB cable.
• A DATAQ Instruments screwdriver for signal lead connections.
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-2008 can be installed via a download-able executable directly from the DATAQ Instruments
web site. No CD is shipped with the device. You may burn the executable onto a CD or USB drive to transport the
software to a computer with no internet connection.
1. Disconnect all DATAQ Instruments USB devices from your Computer.
2. Go to http://run.dataq.com.
3. You must subscribe to our newsletter in order to get the software download link (you can opt-out after down-
load).
4. Save the file to your local hard drive.
5. Double-click on the downloaded file to extract the program and begin software installation.

DI-2008 Hardware Manual
Installation
8
6. Follow the on-screen prompts and enter any required information.
7. 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-2008 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.
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-2008 Hardware Manual
Controls, Indicators, and Connections
9
4. Controls, Indicators, and
Connections
www.dataq.com
USB
CH8
CH7CH6
CH5CH4CH3CH2CH1
Download software at run.dataq.com
+15V GnD
60mA max
D0 D1 D2 D3 D4 D5 D6
DI-2008 Voltage, Thermocouple, and Pulse DAQ
Button
LED
0-30V Max
CountRateRecordEvent
120V rms max
Analog In Channels 1-8
Digital Ports 0-6
Even Marker
Push Button
Activity LED
+15V Out Ground
Mini-B USB
Connection
Bulkhead
mounting ear
Bulkhead
mounting ear
Micro SD
Card Slot
(not used)
Please note: The Micro SD card slot is not used in the DI-2008 Allowing foreign materials to enter the device through
the Micro SD card slot may result in damage to the instrument.
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.
CAUTION
Never touch exposed screw terminal connector pins or screws. This instrument is electrically isolated, which means
that a potentially lethal voltage may be present on the screw terminals depending upon the measurement.
To avoid ESD damage in handling the device, take the following precautions:
Ground yourself with a grounding strap or by touching a grounded object before and during your handling of the
instrument.
!
!

DI-2008 Hardware Manual
Controls, Indicators, and Connections
10
DI-2008 Signal Connections
Refer to the following for screw terminal port identification.
CH#: Analog channels 1-8 (Programmable ±10, ±25, ±50, ±100, ±250, ±500mV; ±1, ±2.5, ±5, ±10, ±25, ±50
Volts or Thermocouple type J, K, T, B, R, S, E, N; 120V rms max.)
D#: Digital port (0-6). Can also be used for specific WINDAQ functions (30 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 - D6 — General-purpose digital ports
+15V: +15V out. Max current = 67mA.
GnD: Ground.
Connecting Signal Leads
Connect signal leads to the DI-2008:
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.
www.dataq.com
USB
CH8
CH7CH6
CH5CH4CH3CH2CH1
Download software at run.dataq.com
+15V GnD
60mA max
D0 D1 D2 D3 D4 D5 D6
DI-2008 Voltage, Thermocouple, and Pulse DAQ
Button
LED
0-30V Max
CountRateRecordEvent
120V rms max

DI-2008 Hardware Manual
Controls, Indicators, and Connections
11
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.
Analog Inputs
Eight differential analog inputs measure ±10, ±25, ±50, ±100, ±200, ±500mV; ±1, ±2.5, ±5, ±10, ±25, ±50 Volts or
Thermocouple temperatures types J, K, T, B, R, S, E, and N (CH1 to CH8, programmable per channel). Designed to
withstand 120 V rms.
Use the following diagram to connect Analog Input Channel 1.
AIN
49.9 :
AIN
49.9 :
0.047 P f
150V 1M
:
To CJC Circuitry
www.dataq.com
USB
CH8
CH7CH6
CH5CH4CH3CH2CH1
Download software at run.dataq.com
+15V GnD
60mA max
D0 D1 D2 D3 D4 D5 D6
DI-2008 Voltage, Thermocouple, and Pulse DAQ
Button
LED
0-30V Max
CountRateRecordEvent
120V rms max
Signal + Signal -

DI-2008 Hardware Manual
Controls, Indicators, and Connections
12
Gain Settings for Voltage Measurements
Each analog input channel on the DI-2008 may be programmed for one of 12 gain ranges.
Change the gain setting for each channel individually:
1. Select the channel (click on the channel box in the left hand side of the waveform screen).
2. Open the Channel Settings dialog box. Select Edit > Channel Settings in the menu or press F10.
Measurement Range Gain Setting
±50V Full Scale 1
±25V Full Scale 2
±10V Full Scale 5
±5V Full Scale 10
±2.5V Full Scale 20
±1V Full Scale 50
±500mV Full Scale 100
±250mV Full Scale 200
±100mV Full Scale 500
±50mV Full Scale 1000
±25mV Full Scale 2000
±10mV Full Scale 5000

DI-2008 Hardware Manual
Controls, Indicators, and Connections
13
3. Select Voltage in the Input Type selection box.
4. Click on the desired gain setting for that channel.
5. Click the Next button to access channel settings for the next channel or click the OK button to close the dialog
box.
Thermocouple Measurements
Each analog input channel on the DI-2008 may be programmed for one of 8 possible thermocouple types (B, E, J, K,
N, R, S, or T). Change the thermocouple type for each channel individually:
1. Select the channel (click on the channel box in the left hand side of the waveform screen).
2. Open the Channel Settings dialog box. Select Edit > Channel Settings in the menu or press F10.
3. Select Thermocouple in the Input Type selection box.
4. Select the desired thermocouple type for that channel.
5. Click the Next button to access channel settings for the next channel or click the OK button to close the dialog
box.
Temperature scale may be changed to Celcius by un-checking the Fahrenheit check box. This changes the scale for
all thermocouple temperature measurements.

DI-2008 Hardware Manual
Controls, Indicators, and Connections
14
Digital Ports
The DI-2008 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 30 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.
D4 - D6 are general-purpose digital inputs.
Equivalent Digital I/O Circuit:
WINDAQ Remote Events (D0 Event)
To use a switch closure or TTL signal to record WINDAQ Event Markers, connect signal leads to the appropriate
Remote Control Event terminals on the DI-2008 as shown below.
Dig In Dx
Dx
10
4.7K
+5
4.7K
Control
3.3V
Signal + Signal -
www.dataq.com
USB
CH8
CH7CH6
CH5CH4CH3CH2CH1
Download software at run.dataq.com
+15V GnD
60mA max
D0 D1 D2 D3 D4 D5 D6
DI-2008 Voltage, Thermocouple, and Pulse DAQ
Button
LED
0-30V Max
CountRateRecordEvent
120V rms max