User`s guide

port on your PC. For even more specialized devices, such as USB DAQ devices,
the manufacturer should provide a DLL with functions you can call to
communicate with the device. To use these devices in DAQFactory, you should
use extern() function and perhaps create a user device. Bottom line: if you are
trying to communicate with a USB device, and not a serial to USB converter (or
device that appears as a serial port) you are reading the wrong guide.
One more note about serial to USB converters. We have had several reports of
problems from customers using multiple serial to USB converters on a single PC.
There appears to be a backlog of some sort in the driver software that is included
with these devices. Most of the cheap devices have the same chip internally and
therefore use the same software driver even though they come from different
manufacturers. If you are using only one converter you are probably OK, but if
you are going to communicate on multiple ports, we strongly recommend
purchasing a converter designed for industrial applications such as the ones from
Sealevel Systems (www.sealevel.com).