Push ON to turn gauge on. Gauge shuts off automatically after 30 seconds of no use (no pressure). Gauge auto-zeros at turn-on. If zeroing is ever needed push ON and hold for 5 seconds. Back light is on whenever gauge is on.
Change batteries when the battery icon shows in the upper right corner of the display. See below right. Replace with 2 quality “AAA” batteries. Access is on the back. Install w. correct polarity.
To convert to metric - Bar, Kgm/cm, or kPa:
Turn gauge on. Hold Units button ontil Psi at top of display flashes. Release Units, then push Units once to move to BAR, then Kg/cm, or kPa. After 3 seconds normal function will resume.
