All Support Guides
- DAQ Devices
- UD Series
- U3
- Start with the Universal Driver
- User's Guide
- 1 - Installation on Windows
- 2 - Hardware Description
- 2.1 - USB
- 2.2 - Status LED
- 2.3 - GND and SGND
- 2.4 - VS
- 2.5 - Flexible I/O (FIO/EIO)
- 2.6 - AIN
- 2.6.1 - Channel Numbers
- 2.6.2 - Converting Binary Readings to Voltages
- 2.6.3 - Typical Analog Input Connections
- 2.6.3.1 - Signal from the LabJack
- 2.6.3.2 - Unpowered Isolated Signal
- 2.6.3.3 - Signal Powered By the LabJack
- 2.6.3.4 - Signal Powered Externally
- 2.6.3.5 - Amplifying Small Signal Voltages
- 2.6.3.6 - Signal Voltages Beyond 0-2.44 Volts (and Resistance Measurement)
- 2.6.3.7 - Measuring Current (Including 4-20 mA) with a Resistive Shunt
- 2.6.3.8 - Floating/Unconnected Inputs
- 2.6.4 - Internal Temperature Sensor
- 2.7 - DAC
- 2.8 - Digital I/O
- 2.9 - Timers/Counters
- 2.9.1 - Timer Mode Descriptions
- 2.9.1.1 - PWM Output (16-Bit, Mode 0)
- 2.9.1.2 - PWM Output (8-Bit, Mode 1)
- 2.9.1.3 - Period Measurement (32-Bit, Modes 2 & 3)
- 2.9.1.4 - Duty Cycle Measurement (Mode 4)
- 2.9.1.5 - Firmware Counter Input (Mode 5)
- 2.9.1.6 - Firmware Counter Input With Debounce (Mode 6)
- 2.9.1.7 - Frequency Output (Mode 7)
- 2.9.1.8 - Quadrature Input (Mode 8)
- 2.9.1.9 - Timer Stop Input (Mode 9)
- 2.9.1.10 - System Timer Low/High Read (Modes 10 & 11)
- 2.9.1.11 - Period Measurement (16-Bit, Modes 12 & 13)
- 2.9.2 - Timer Operation/Performance Notes
- 2.9.1 - Timer Mode Descriptions
- 2.10 - SPC (… and SCL/SDA/SCA)
- 2.11 - DB15
- 2.12 - U3-OEM
- 2.13 - Hardware Revision Notes
- 3 - Operation
- 4 - LabJackUD High-Level Driver
- 4.1 - Overview
- 4.2 - Function Reference
- 4.2.1 - ListAll()
- 4.2.2 - OpenLabJack()
- 4.2.3 - eGet() and ePut()
- 4.2.4 - eAddGoGet()
- 4.2.5 - AddRequest()
- 4.2.6 - Go()
- 4.2.7 - GoOne()
- 4.2.8 - GetResult()
- 4.2.9 - GetFirstResult() and GetNextResult()
- 4.2.10 - DoubleToStringAddress()
- 4.2.11 - StringToDoubleAddress()
- 4.2.12 - StringToConstant()
- 4.2.13 - ErrorToString()
- 4.2.14 - GetDriverVersion()
- 4.2.15 - TCVoltsToTemp()
- 4.2.16 - ResetLabJack()
- 4.2.17 - eAIN()
- 4.2.18 - eDAC()
- 4.2.19 - eDI()
- 4.2.20 - eDO()
- 4.2.21 - eTCConfig()
- 4.2.22 - eTCValues()
- 4.3 - Example Pseudocode
- 4.3.1 - Open
- 4.3.2 - Configuration
- 4.3.3 - Analog Inputs
- 4.3.4 - Analog Outputs
- 4.3.5 - Digital I/O
- 4.3.6 - Timers & Counters
- 4.3.7 - Stream Mode
- 4.3.8 - Raw Output/Input
- 4.3.9 - Easy Functions
- 4.3.10 - SPI Serial Communication
- 4.3.11 - I²C Serial Communication
- 4.3.12 - Asynchronous Serial Communication
- 4.3.13 - Watchdog Timer
- 4.3.14 - Miscellaneous
- 4.4 - Errorcodes
- 5 - Low-level Function Reference
- 5.1 - General Protocol
- 5.2 - Low-Level Functions
- 5.2.1 - Bad Checksum
- 5.2.2 - ConfigU3
- 5.2.3 - ConfigIO
- 5.2.4 - ConfigTimerClock
- 5.2.5 - Feedback
- 5.2.5.1 - AIN: IOType = 1
- 5.2.5.2 - WaitShort: IOType=5
- 5.2.5.3 - WaitLong: IOType=6
- 5.2.5.4 - LED: IOType=9
- 5.2.5.5 - BitStateRead: IOType=10
- 5.2.5.6 - BitStateWrite: IOType=11
- 5.2.5.7 - BitDirRead: IOType=12
- 5.2.5.8 - BitDirWrite: IOType=13
- 5.2.5.9 - PortStateRead: IOType=26
- 5.2.5.10 - PortStateWrite: IOType=27
- 5.2.5.11 - PortDirRead: IOType=28
- 5.2.5.12 - PortDirWrite: IOType=29
- 5.2.5.13 - DAC# (8-bit): IOType=34,35
- 5.2.5.14 - DAC# (16-bit): IOType=38,39
- 5.2.5.15 - Timer#: IOType=42,44
- 5.2.5.16 - Timer#Config: IOType=43,45
- 5.2.5.17 - Counter#: IOType=54,55
- 5.2.5.18 - Buzzer: IOType=63
- 5.2.6 - ReadMem (ReadCal)
- 5.2.7 - WriteMem (WriteCal)
- 5.2.8 - EraseMem (EraseCal)
- 5.2.9 - Reset
- 5.2.10 - StreamConfig
- 5.2.11 - StreamStart
- 5.2.12 - StreamData
- 5.2.13 - StreamStop
- 5.2.14 - Watchdog
- 5.2.15 - SPI
- 5.2.16 - AsynchConfig
- 5.2.17 - AsynchTX
- 5.2.18 - AsynchRX
- 5.2.19 - I2C
- 5.2.20 - SHT1X
- 5.3 - Errorcodes
- Appendix A - Specifications
- Appendix B - Enclosure and PCB Drawings
- Frequency List for U3 Timer Mode 7
- UD Driver for Windows with U3 Quick Reference
- U3 Base Class for Linux
- U3 Firmware Revision History
- U6
- Start with the UD Driver
- User's Guide
- 1 - Installation on Windows
- 2 - Hardware Description
- 2.1 - USB
- 2.2 - Power and Status LED
- 2.3 - GND and SGND
- 2.4 - VS
- 2.5 - 10UA and 200UA
- 2.6 - AIN
- 2.6.1 - Channel Numbers
- 2.6.2 - Converting Binary Readings to Voltages
- 2.6.3 - Typical Analog Input Connections
- 2.6.3.1 - Signal from the LabJack
- 2.6.3.2 - Unpowered Isolated Signal
- 2.6.3.3 - Singal Powered By the LabJack
- 2.6.3.4 - Signal Powered Externally
- 2.6.3.5 - Amplifying Small Signal Voltages
- 2.6.3.6 - Signal Voltages Beyond ±10 Volts (and Resistance Measurement)
- 2.6.3.7 - Measuring Current (Including 4-20 mA) with a Resistive Shunt
- 2.6.3.8 - Floating/Unconnected Inputs
- 2.6.4 - Internal Temperature Sensor
- 2.7 - DAC
- 2.8 - Digital I/O
- 2.9 - Timers/Counters
- 2.9.1 - Timer Mode Descriptions
- 2.9.1.1 - PWM Output (16-Bit, Mode 0)
- 2.9.1.2 - PWM Output (8-Bit, Mode 1)
- 2.9.1.3 - Period Measurement (32-Bit, Modes 2 & 3)
- 2.9.1.4 - Duty Cycle Measurement (Mode 4)
- 2.9.1.5 - Firmware Counter Input (Mode 5)
- 2.9.1.6 - Firmware Counter Input With Debounce (Mode 6)
- 2.9.1.7 - Frequency Output (Mode 7)
- 2.9.1.8 - Quadrature Input (Mode 8)
- 2.9.1.9 - Timer Stop Input (Mode 9)
- 2.9.1.10 - System Timer Low/High Read (Modes 10 & 11)
- 2.9.1.11 - Period Measurement (16-Bit, Modes 12 & 13)
- 2.9.2 - Timer Operation/Performance Notes
- 2.9.1 - Timer Mode Descriptions
- 2.10 - SPC (or VSPC)
- 2.11 - DB37
- 2.12 - DB15
- 2.13 - OEM Connector Options
- 3 - Operation
- 4 - LabJackUD High-Level Driver
- 4.1 - Overview
- 4.2 - Function Reference
- 4.2.1 - ListAll()
- 4.2.2 - OpenLabJack()
- 4.2.3 - eGet() and ePut()
- 4.2.4 - eAddGoGet()
- 4.2.5 - AddRequest()
- 4.2.6 - Go()
- 4.2.7 - GoOne()
- 4.2.8 - GetResult()
- 4.2.9 - GetFirstResult() and GetNextResult()
- 4.2.10 - DoubleToStringAddress()
- 4.2.11 - StringToDoubleAddress()
- 4.2.12 - StringToConstant()
- 4.2.13 - ErrorToString()
- 4.2.14 - GetDriverVersion()
- 4.2.15 - TCVoltsToTemp()
- 4.2.16 - ResetLabJack()
- 4.2.17 - eAIN()
- 4.2.18 - eDAC()
- 4.2.19 - eDI()
- 4.2.20 - eDO()
- 4.2.21 - eTCConfig()
- 4.2.22 - eTCValues()
- 4.3 - Example Pseudocode
- 4.3.1 - Open
- 4.3.2 - Configuration
- 4.3.3 - Analog Inputs
- 4.3.4 - Analog Outputs
- 4.3.5 - Digital I/O
- 4.3.6 - Timers & Counters
- 4.3.7 - Stream Mode
- 4.3.8 - Raw Output/Input
- 4.3.9 - Easy Functions
- 4.3.10 - SPI Serial Communication
- 4.3.11 - I²C Serial Communication
- 4.3.12 - Asynchronous Serial Communication
- 4.3.13 - Watchdog Timer
- 4.3.14 - Miscellaneous
- 4.4 - Errorcodes
- 5 - Low-level Function Reference
- 5.1 - General Protocol
- 5.2 - Low-Level Functions
- 5.2.1 - Bad Checksum
- 5.2.2 - ConfigU6
- 5.2.3 - ConfigIO
- 5.2.4 - ConfigTimerClock
- 5.2.5 - Feedback
- 5.2.5.1 - AIN: IOType = 1
- 5.2.5.2 - AIN24: IOType = 2
- 5.2.5.3 - AIN24AR: IOType = 3
- 5.2.5.4 - WaitShort: IOType=5
- 5.2.5.5 - WaitLong: IOType=6
- 5.2.5.6 - LED: IOType=9
- 5.2.5.7 - BitStateRead: IOType=10
- 5.2.5.8 - BitStateWrite: IOType=11
- 5.2.5.9 - BitDirRead: IOType=12
- 5.2.5.10 - BitDirWrite: IOType=13
- 5.2.5.11 - PortStateRead: IOType=26
- 5.2.5.12 - PortStateWrite: IOType=27
- 5.2.5.13 - PortDirRead: IOType=28
- 5.2.5.14 - PortDirWrite: IOType=29
- 5.2.5.15 - DAC# (8-bit): IOType=34,25
- 5.2.5.16 - DAC# (16-bit): IOType=38,39
- 5.2.5.17 - Timer#: IOType=42.44,46,48
- 5.2.5.18 - Timer#Config: IOType = 43, 45, 47, 49
- 5.2.5.19 - Counter#: IOType = 54, 55
- 5.2.6 - ReadMem (ReadCal)
- 5.2.7 - WriteMem (WriteCal)
- 5.2.8 - EraseMem (EraseCal)
- 5.2.9 - SetDefaults (SetToFactoryDefaults)
- 5.2.10 - ReadDefaults (ReadCurrent)
- 5.2.11 - Reset
- 5.2.12 - StreamConfig
- 5.2.13 - StreamStart
- 5.2.14 - StreamData
- 5.2.15 - StreamStop
- 5.2.16 - Watchdog
- 5.2.17 - SPI
- 5.2.18 - AsynchConfig
- 5.2.19 - AsynchTX
- 5.2.20 - AsynchRX
- 5.2.21 - I2C
- 5.2.22 - SHT1X
- 5.3 - Errorcodes
- 5.4 - Calibration Constants
- Appendix A - Specifications
- Appendix B - Noise and Resolution Tables
- Appendix C - Enclosure and PCB Drawings
- U6 Dimension Drawing
- U6 Firmware Revision History
- UE9
- Start with the Universal Driver
- User's Guide
- 1 - Installation on Windows
- 2 - Hardware Description
- 2.1 - USB
- 2.2 - Ethernet
- 2.3 - Vext (Screw Terminals and Power Jack)
- 2.4 - Comm and Control LEDs
- 2.5 - GND and SGND
- 2.6 - Vs
- 2.7 - AIN
- 2.7.1 - Channel Numbers
- 2.7.2 - Converting Binary Readings to Voltages
- 2.7.3 - Typical Analog Input Connections
- 2.7.3.1 - Signal from the LabJack
- 2.7.3.2 - Unpowered Isolated Signal
- 2.7.3.3 - Signal Powered by the LabJack
- 2.7.3.4 - Signal Powered Externally
- 2.7.3.5 - Amplifying Small Signal Voltages
- 2.7.3.6 - Signal Voltages Beyond ±5 Volts (and Resistance Measurement)
- 2.7.3.7 - Measuring Current (Including 4-20 mA) with a Resistive Shunt
- 2.7.3.8 - Floating/Unconnected Inputs
- 2.7.4 - Internal Temperature Sensor
- 2.8 - DAC
- 2.9 - Digital I/O
- 2.10 - Timers/Counters
- 2.10.1 - Timer Mode Descriptions
- 2.10.1.1 - PWM Output (16-Bit, Mode 0)
- 2.10.1.2 - PWM Output (8-Bit, Mode 1)
- 2.10.1.3 - Period Measurement (32-Bit, Modes 2 & 3)
- 2.10.1.4 - Duty Cycle Measurement (Mode 4)
- 2.10.1.5 - Firmware Counter Input (Mode 5)
- 2.10.1.6 - Firmware Counter Input With Debounce (Mode 6)
- 2.10.1.7 - Frequency Output (Mode 7)
- 2.10.1.8 - Quadrature Input (Mode 8)
- 2.10.1.9 - Timer Stop Input (Mode 9)
- 2.10.1.10 - System Timer Low/High Read (Modes 10 & 11)
- 2.10.1.11 - Period Measurement (16-Bit, Modes 12 & 13)
- 2.10.2 - Timer Operation/Performance Notes
- 2.10.1 - Timer Mode Descriptions
- 2.11 - SCL and SDA (or SCA)
- 2.12 - DB37
- 2.13 - DB15
- 2.14 - OEM Connector Options
- 3 - Operation
- 4 - LabJackUD High-Level Driver
- 4.1 - Overview
- 4.2 - Function Reference
- 4.2.1 - ListAll()
- 4.2.2 - OpenLabJack()
- 4.2.3 - eGet() and ePut()
- 4.2.4 - eAddGoGet()
- 4.2.5 - AddRequest()
- 4.2.6 - Go()
- 4.2.7 - GoOne()
- 4.2.8 - GetResult()
- 4.2.9 - GetFirstResult() and GetNextResult()
- 4.2.10 - DoubleToStringAddress()
- 4.2.11 - StringToDoubleAddress()
- 4.2.12 - StringToConstant()
- 4.2.13 - ErrorToString()
- 4.2.14 - GetDriverVersion()
- 4.2.15 - TCVoltsToTemp()
- 4.2.16 - ResetLabJack()
- 4.2.17 - eAIN()
- 4.2.18 - eDAC()
- 4.2.19 - eDI()
- 4.2.20 - eDO()
- 4.2.21 - eTCConfig()
- 4.2.22 - eTCValues()
- 4.3 - Example Pseudocode
- 4.3.1 - Open
- 4.3.2 - Configuration
- 4.3.3 - Analog Inputs
- 4.3.4 - Analog Outputs
- 4.3.5 - Digital I/O
- 4.3.6 - Timers & Counters
- 4.3.7 - Stream Mode
- 4.3.8 - Raw Output/Input
- 4.3.9 - Easy Functions
- 4.3.10 - SPI Serial Communication
- 4.3.11 - I²C Serial Communication
- 4.3.12 - Asynchronous Serial Communication
- 4.3.13 - Watchdog Timer
- 4.3.14 - Miscellaneous
- 4.4 - Errorcodes
- 5 - Low-level Function Reference
- 5.1 - General Protocol
- 5.2 - Comm Functions
- 5.3 - Control Functions
- 5.3.1 - BadChecksum
- 5.3.2 - ControlConfig
- 5.3.3 - Feedback (and FeedbackAlt)
- 5.3.4 - SingleIO
- 5.3.5 - TimerCounter
- 5.3.6 - StreamConfig
- 5.3.7 - StreamStart
- 5.3.8 - StreamData
- 5.3.9 - StreamStop
- 5.3.10 - ReadMem
- 5.3.11 - WriteMem
- 5.3.12 - EraseMem
- 5.3.13 - WatchdogConfig
- 5.3.14 - WatchdogRead
- 5.3.15 - Reset
- 5.3.16 - SPI
- 5.3.17 - AsynchConfig
- 5.3.18 - AsynchTX
- 5.3.19 - AsynchRX
- 5.3.20 - I²C
- 5.3.21 - SHT1X
- 5.3.22 - StreamDAC
- 5.4 - Low-Level Errorcodes
- 5.5 - Modbus
- Appendix A - Specifications
- Appendix B - Noise and Resolution Tables
- Appendix C - Enclosure and PCB Drawings
- C Native TCP Example
- Modbus TCP Example
- Calibration App
- UE9 Ethertest
- LabVIEW Native TCP Example
- PocketPC Native TCP Example
- Wireless data acquisition
- UD Driver for Windows Quick Reference
- UE9 Firmware Revision History
- Software Options
- Installers and Drivers
- Applications
- Programming
- DAQFactory
- CloudDot
- U3
- U12
- U12 OEM PH/NTH Dimension Drawings
- U12 Setup V1.21
- U12 Quickstart Guide
- U12 User's Guide
- Hardware Troubleshooting
- Win 98 SE HID
- U12 Example Code
- DASYLab Info
- Delphi Example
- Delphi IO Example
- Excel Example
- Java Example
- LabJack DotNet
- LabVIEW
- LabWindows/CVI
- MATLAB
- Perl
- PowerBASIC Example
- Python Example
- TestPoint Example
- VC6 Simple Example
- VC6 Stream Example
- Borland C Builder
- Dev-C++ Example
- Visual C++ OCX
- Visual C++ DLL
- Visual Basic 6 (VB6)
- VB6 DirectDLL Examples
- C Bit Operations
- VEE Examples
- LJsimplelog
- LJstream1
- LJstream2
- EEPROM Example
- SPI Example
- UD Series
- Accessories
- CB15 Datasheet
- CB25 Datasheet
- CB37 V1.2 Datasheet
- CB37 V2.1 Datasheet
- DCA-10 Datasheet
- EB37 Datasheet
- EI-1022 Datasheet
- EI-1034 Datasheet
- EI-1040 Datasheet
- EI-1050 Datasheet
- EI-1050 Utility for Windows
- LJTick-CurrentShunt Datasheet
- LJTick-DAC Datasheet
- LJTick-DAC Testing Utility
- LJTick-Divider Datasheet
- LJTick-InAmp Datasheet
- LJTick-Proto Datasheet
- LJTick-RelayDriver Datasheet
- RB12 Datasheet
- RB16 Datasheet and Schematic
- CloudDot
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Testimonials
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Thanks for the clear and succinct support - what a pleasure. [...] Thanks so much for your prompt, clear and helpful response (virtual cheers!)
—Dan, USA


Comments
error instaling LabjackUD
When I try install labjackud, the program show me "The LabJackUD Setup Wizard ended prematurely" and uninstall all.
I am using Windows Vista. What can I do?
Troubleshooting the UD Installer
If you are using the installer from the CD, you might try using the one from our website. Another fix that often works with Vista is to right click the installer and select "Run as administrator" option.
If none of that works you can run the installer from the command prompt (Start Menu -> run -> cmd) and create a logfile using:
C:\LabJackUDSetupV315.exe /L*V "C:\LJInstaller.log"
You will need to use the name of your installer in place of the one above (3.15 is the most current) and you can rename the log file if you wish. This works assuming the installer and log file will both be in the root directory on the C: drive. Once that is done you can email us the log at support@labjack.com and we can take a look and see what is failing.
2 labjacks
can i hook more than one labjack up to one computer at the same time and reference both of them in the same program??
Yes
Yes. Some of our simple sample applications are just set up to talk to 1 device, but in general you can connect lots of devices. In software you address them by serial number or a Local ID (0-255) that you specify.
What about mixing U12 and U3 on one machine?
In looking at the labjackusb driver there is no u12.h equivalent file so that I can access the U12 labjack with the same functions as I do for the U3. My program functions under Linux. I have the labjack kernel module installed for the U12 and I'm wondering if I can have both labjacks installed on the machine at the same time. How do I tell programatically what one is which? I suppose InitLabjack() should only get the first U12 labjack, right? openUSBConnection() (referenced from the u3.c/.h helper functions) should only return the U3 ID, yes?
Yes
Yes, you can use a U3 and a U12 at the same time.
You can see in the code for openUSBConnection() in u3.c that it will open only U3s.
The Exodriver (new Linux driver) has preliminary support for the U12, but we don't have examples or a u12.h file. I would keep using the old kernel module code for it if it's working for you.