Device for bearing diagnostics using shock pulse methodOperation manualSection 4 Operation 17Figure 4-3. Setting rpm and diameter. Step 2. Press the M key to exit the setting mode.NoteWhen dBi is lower than -9 or higher than 40, the display shows “--” (twohyphens).Shock pulse measurement:Switch on the tester BALTECH VP-3450, the last reading and dBi value will bedisplayed.If necessary, change the dBi valueMove the sensor to a measurement point;Press the M button.Figure 4-4. Shock pulse measurement.