... ±0.1%6. 4 Pre-set : 5%, 16.25%, 72.5%, 95%BUTTON INSTRUCTION1. Select Button: When the corresponding ... the corresponding indicator light turn on, press ↑ ↓button to choose 4 kinds of pre-set : 5%, 16.25%, ... POWER switch, oil pump power off. Press Select button, indicator lamp light, and press arrow ↑ ↓ ... to choose pre-set rank, and press select button again, indicator lamp power-off,Then reback to ...