This Loop Checkout and Troubleshooting Course will start by providing maintenance and engineering personnel with a basic understanding of control loop fundamentals and basic process control theory. Following this introduction, instrument loop drawings will be studied in detail with a review of Pipe & Instrument Drawings. Next is a discussion of loop calculations needed to checkout and troubleshoot control loops, followed by actual hand-on exercises in the PTU. The Advanced hands-on portion of the course begins with a review of test equipment used in loop checkout and troubleshooting, which is followed by basic and advanced hands-on exercises in the PTU. Finally, methodologies for loop troubleshooting will be explored, followed by basic and advanced loop troubleshooting exercise in the PTU. To ensure that the student can best benefit from this training, they should be familiar with basic instrument configuration as a prerequisite for this class. The class will be a combination of classroom and hands-on training on the PAC Works Advanced Process Training Units, a scaled down working process skid with online instrumentation and controls.