LabPro (LABPRO, discontinued)
LabPro User Manual:

Product Overview
For a comparison of LabPro specs with other Vernier interfaces, see:
Does LabQuest replace LabPro?
What is the difference between the LabQuest Mini and the LabPro?

General Troubleshooting steps:

1. Make sure the interface has power. For trouble shooting purposes, remove the batteries from LabPro. A few seconds after connecting LabPro to AC power, it should make the “happy sound” to indicate that it has power and has passed a self-test.

Download the MP3, or WAV file.

If the LabPro does not make the “happy sound”, see LabPro gives unfamiliar beeps or does not make the "happy sound."

2. Check all of your cable connections. Make sure that one end of the cable is completely plugged in to the interface and the other end is all the way into the computer.

3. What version of Logger Pro are using? To find out, open the program and choose “About Logger Pro“. The exact version number will be at the bottom of the window that opens. Many problems can be resolved by installing a free upgrade from our web site at:
If Logger Pro was installed via a push or image process from the school IT department, there is chance the software drivers are not installed correctly. See
     Logger Pro can not connect to LabPro

4. If you have multiple computers and interfaces, with some of them are working and some are not, try methodically switching interfaces, cables, power supplies and computers to see if the problem is with a piece of the hardware. The best test to do is to take one of your completely working stations, and try swapping in a different interface, then a new connector cable, etc. If you can trace the problem to one of these pieces, we can probably repair or replace that part. It is not uncommon to have either a bad USB cable, or a LabPro with a damaged USB port. This is usually caused by students forcing a cable into the port upside-down. If this is the case, try wiggling the cable to see if the green LED ever comes on. If it works intermittently, please contact us to set up a repair.

Batteries and Power
What is the battery life for LabPro? When is LabPro Powered (On, Off)?
My LabPro units wear down batteries quickly. What can I do to extend the battery life?
What kind of batteries should I use with LabPro?
Can LabPro handle 220 V with the appropriate adapter?
My IPS AC Adapter does not power my LabPro, WDSS, or Stir Station.

Care and Maintenance
How do I prevent my LabPro interfaces from being stolen?
Do you know of a good case for carrying LabQuests, LabPros, calculators, and/or sensors?
How should I organize my Vernier equipment?

Updating the LabPro Operating System (OS)
How do I update a LabPro or CBL2 interface using a TI Connectivity Cable?
How to restore LabPro firmware and update LabPro
What do I do if the automatic LabPro OS update in Logger Pro 3 fails?
LabPro gives unfamiliar beeps or does not make the "happy sound."
Logger Pro 3.7 crashes when I update my LabPro OS.
Is there a USB driver-only installer for the LabPro/LabQuest Mini/original LabQuest/LabQuest Stream?

Using Computers with LabPro
Logger Pro can not connect to LabPro
Logger Lite does not find my LabPro.
Windows Pre-Logger Pro 3.11 original LabQuest and LabQuest Mini, and pre-3.12 LabPro drivers
Why does Windows keep reinstalling the LabPro USB drivers for student accounts?
Logger Pro 3 for Mac freezes or hangs when LabPro batteries are very low
Logger Pro conflicts with Total Traffic Control

Using Calculators with LabPro
Can the CHEMBIO and PHYSICS programs be used with the CBL 2 and LabPro?
How do you use an Instrumentation Amplifier with a TI Graphing Calculator?
My Motion Detector is not collecting data with DataMate and LabPro.
My photogates don't work with the PHYSICS calculator program

Using Palm Handhelds with LabPro

Remote Data Collection with LabPro
How do I set up LabPro and Logger Pro for remote data collection?
My 6-V lantern battery is draining very quickly during long-term data collection in the field using LabPro (or CBL 2) with the External Battery Cable.
When I retrieve data from a remote data collection experiment using Logger Pro, I get just voltages or incorrect readings. What is wrong?
Why is my calibration different when using sensors for remote collection?
How does the LabPro Heart Rate algorithm work?

Do It Yourself (DIY)
Where can I find BTA and BTD connectors and sockets?
How can I write my own programs for LabPro?
How do I make an Auto-ID Resistance Probe?

Using LabVIEW with LabPro
Can I use LabPro with LabVIEW?

Using the Signal Generator Feature of LabPro
How do I use the function generator and analog output feature of LabPro?
The Power Amplifier doesn't respond to LabPro input.
Can I use the DCU with the CBL 2 or LabPro?
How do I use the Pasco Power amplifier with LabPro?

Sensor-Specific Issues
Extensive help and troubleshooting tips for each of our sensors is available on the individual sensor pages:
Can I use Logger Pro as an oscilloscope?

Tips and Tricks
Why does CH4 on LabPro read a different voltage from the others?
What sensors do not autoID with LabPro?

Using LabPro with Products from Other Companies
Are Vernier and Pasco products compatible?
Can the labs for Holt Physics be performed with CBL 2 or LabPro?
Does the Daedalon photogate work with LabPro or ULI?
Can an Acculab motion detector work with LabPro?
What Vernier equipment is used with the Holt Spectrum Science manuals?
Can the PSL (Team Labs) Rotary Motion Probe be used with my Vernier equipment?

Using LabPro with Older Vernier Software and Sensors
Why can‘t my Macintosh computer locate the LabPro when connected with a USB cable?
When using Logger Pro 2.0 for Windows the program is unable to detect the connected LabPro using the USB cable. What is the problem?
Why does Windows 2000 or XP warn me that the LabPro USB driver is untested?
Are LabPro and Logger Pro compatible with Windows 3.1?
Is LabPro compatible with your older software, DataLogger, ULI Timer, and MacMotion (running on an old Mac)?
Can I use older sensors with LabQuest 2 or other new interfaces?
How can I update to new Vernier equipment and still make use of my old Vernier equipment?
Why do I get forces peaking at different times when performing the ILD Newton‘s 3rd Law Collision experiment with a LabPro and Logger Pro 2?

Sensor-specific issues
Rotary Motion Sensor will not Auto ID with LabPro.
Is there a problem using an MPLI microphone with LabPro?
The rotary motion sensor won't stay zeroed when using LabPro.
What is the timing precision of photogate measurements?
My Dual-Range Force Sensor is noisy when used with a Motion Detector and LabPro.
What is a heat pulser and what do I need to use one? If I have an old Heat Pulser can it be modified to work with LabPro?
What is the input impedance of a LabPro voltage probe?
My motion detector still reads 0.004 m after zeroing.