How do I zero the KELLER LEO 3 digital pressure gauge?

[StHolden]

To establish a new zero reference point on your KELLER LEO 3 digital pressure gauge, follow these straightforward steps. First, power on the LEO 3 by connecting it to an external power source. Allow approximately three seconds for the instrument to initialize and enter measuring mode. Once in measuring mode, press the SELECT button twice; this will display "MANO." Next, press the ENTER button to navigate to "ZERO SET." Finally, press ENTER once more to confirm the new zero reference. The gauge will acknowledge the updated zero setting and automatically return to the measuring mode, ready to provide accurate pressure readings.