Functional ButtonsBelow table indicated for information about the functional button operations.Button Operation Performedl Press once to turn the meter on.l Press and hold for 1 minute to turn it off.l When measuring RPM and Counts, press once to enter the Hold mode. Press it againto exit hold mode.l When measuring RPM and Counts, press it to toggle between RPM and Counts feature.l Press and hold for 1 minute to enter setup feature, the LCD displays USB. After that,each press to step through LED / SR / AOFF / CLK / exiting setup feature to enter RPMor Count. You could press ON/OFF button to exit setup mode and returning to normalmeasurement mode at any time.l Press this button to choose maximum reading, minimum reading, average reading,zerong, Tunel Under Tach measurement mode, press M/M/A button to select MAX/MIN/AVE andnormal value measurement,After entering USB/LED/SR/AOFF/CLK mode, press this button to setup 0 or 1 and time.l In the RPM or COUNT mode.press and hold the button for more than second therelative time will be clear and execute HOLD function In the COUNT mode pressing thebutton will be clear.ON/OFFR/CM/M/AModel UT371/372: OPERATING MANUAL8