Making Your Job Mrs Enjoyable poy Vm Making Your Job More Enjoyable CANVASBACK Warming: Measurement below atmospheric pressure, it will not function properly when exposed to refrigerant gases. 1. Slide battery cover on a back of the vacuum gauge and install three AA batteries. 2. Press(e) for three seconds to tum on the gauge. The screen shows followed by short beep. 3. Connect the gauge to the system to be evacuated. 4. Turn vacuum pump on and read the vacuum level on the screen.