Tech Note 40 Detail

ScienceWorkshop software cannot find the SW700 interface

Affected Products:


The ScienceWorkshop software scans for but can not find the 700 interface or the software loses its connection to the 700 interface. What can I do?

PASCO Solution:

Note: The ScienceWorkshop 700 and 750 interfaces are obsolete. The newer 850 interfaces would support all of your ScienceWorkshop sensors and all PASPort sensors with our newer Capstone software.


  1. Make sure that the 700 interface is turned on before the computer is booted. If the green light on the 700 interface does not come on, troubleshoot the power problem.
  2. Make sure that you have the latest version of the ScienceWorkshop software or our newer data acquisition software, DataStudio.
  3. If you are running under Windows 3.1 and the 700 interface is initializing when the software brings up the window that gives you the options to Try Again or Continue W/O Interface screen, check to make sure that you do not have an incompatible version of the software.
  4. Check the cabling. Make sure that the pins look straight, that all connections are firmly pressed in, and that the terminator has been put in the back of the 700.
  5. If you have other SCSI devices on your computer, you may need to change the SCSI ID number on the interface. Each SCSI device connected to your computer must have its own, unique ID number between 1 and 6 so the computer can distinguish it from other attached SCSI devices. The Science Workshop 700 Interface SCSI ID number is preset to 2. You can change this ID number by placing a small screwdriver in the hole and twisting to move the indicator on the back of the 700 interface to another number.
  6. Unplug the 700 interface box. Then, using a screwdriver, remove the four screws on the side of the interface securing the interface cover to the base. Lift off the cover and make the following checks:
    • Make sure the red switch located between the transformer and the power connector is set to the proper voltage (115V or 230V).
    • Make sure that the ribbon cable connector is firmly seated.
    • Check the continuity of the 1A 250V black fuse located between the SCSI connector and the large blue 4700µF capacitor and next to the chip socket for the Zilog IC. Remove it from the board. Use the ohms range on a multimeter to find the resistance between the two leads of the fuse. It should be 0 ohms. If the resistance is too high to be read, then it should be replaced.
  7. If you are running Science Workshop in Windows 95, make sure that the SCSI card is properly installed and follow the additional troubleshooting tips.
  8. If you are running Science Workshop in Windows NT, check the recommended procedure.
  9. If you successfully used the interface on a Macintosh computer and are now having problems using it on a PC, check to make sure that you have completed all the necessary steps for the Macintosh to PC conversion.

Creation Date: 01/1/2000
Last Modified: 11/18/2014
Mod Summary: