Troubleshooting the Sample Changer

For general information see Introduction to practical NMR at UNSW and 1D NMR experiments on DPX instruments

For general information on acquiring and processing 2D experiments see Routine 2D NMR experiments on DPX instruments

Troubleshooting

Problem: The automation interface appears to lock, usually after trying to change an NMR parameter

Solution: Check that the XWINNMR program is not waiting for input. The XWINNMR program window is usually minmized and looks like this:


The XWINNMR icon

Click to open and enter the required value for your parameter in the small window.

Problem: There is no signal in my ¹³C spectrum, not even a solvent peak e.g., CDCl₃.

Solution: Check that the QNP switch is set to automatic. This means that the light in the white button labelled "MANUAL" at the bottom of the preamplifier housing next to the base of the magnet should be switched off. If the light is on, push it up to 3 times until it switches off.

Back to Local Information