Place water in your tank and set your sous vide cooker to 135 degrees F for medium chops. I don't recommend higher settings. You can cook at 130 F for medium rare chops if that's your preference. See note below on food safety.
Combine the herbs and spices in a small bowl.
Lightly salt the chops on both sides
Rub the chops all over with the spice mixture, massaging it into the meat
Seal chops in separate plastic bags. You can use ordinary baggies for this step, but then you'll need to hang them from clips so less water seeps into the bag during the cooking process. If you have a vacuum sealer, you can just put the bags in water.
You don't have to wait for the bath to reach temperature--you can just put the chops in right away. But be sure to get 90 minutes at full temperature.