Recalibratable Air Gauge - Cal400

Recalibratable Air Gauge. Recalibrate without disassembling the gauge. Metal bar calibrated 10 to 150 lbs. in 2 lb. units

Recalibrating 54881 Air Gauge
Use a flat screwdriver with a maximum OD of 0.1" to adjust the scale bar.
Turn 360° clockwise to increase 1 psi. Turn 360° counter clockwise to decrease 1 psi.