To remove the sample basket, lift up the side cover (NOTE: this cannot be done during a measurement). Once the side cover has been removed, pull the metal pin that is protruding from the sample chamber and turn it counter-clockwise 90°. The sample basket can now be removed by pulling it out from the measurement chamber.
To re-insert the sample basket, place it back in the measurement chamber. Be sure the basket is fitted properly as improper basket placement can result in poor data quality. At the far end of the basket, there should be a ¼ inch of space between where the basket ends and the back of the sample chamber ends; at the front end of the basket, the sample basket should be at an even angle, flush against the surface. Once the sample basket is fitted tightly, turn the metal pin clockwise 90° until it clicks back into place. For a detailed walkthrough and images on removing and reseating the sample basket, refer to the Sample Basket Guide Quick Start Card shipped with your Petra Autosampler.
It is recommended that users run a check sample after they reseat the sample basket.