I am trying to communicate with a Lamdba-Nu TL-401USB Temperature Logger, that is connected to my computer via USB. I am trying to write a Labview Program to collect data using Labview 8.5. I am able to send the command "@b\n\r" to get the device to start recording data using the VISA Test Panel through Measurement & Automation Explorer. However, if I try to send the same command in a Labview VI, nothing happens. I am able to send a command "@tx\n\r" which will change the interval that data is taken to x seconds. I am also able to read the temperatures every 3 seconds using the VISA Read command in a timed loop if I had already given the Start recording command through VISA Test Panel. So I can communicate with the device, but I can't start the recording process. Is there a difference in VISA Test Panel compared to VISA Write that may reason for this? I attached the VI and manual for the device.
