Understands the basic function a Barton DryFlow chart recorder. Understands the construction and configuration of the Barton DryFlow chart recorder. ? Understand the function of each internal component: Bellows (differential pressure), temperature spring, and static pressure spring; Clock, pens and paper charts: Mechanical linkages. Understand the linkage and relationships between components. Understands the basic maintenance and operating tasks related to the Barton DryFlow chart recorder: Changing charts: Changing pens, changing clock batteries, verifying zero readings, and properly documenting and submitting paperwork/char