Connect the pulse oximeter probe to a finger or an earlobe (whichever is appropriate) or to a simulator, and verify that reasonable S_p 〖O 〗_2 values and pulse rate are displayed. The S_p 〖O 〗_2for a healthy adult should fall between 95% and 100%. If a simulator is used, test at several S_p 〖O 〗_2 and pulse rate values, if available. The displayed pulse rate should correspond to a manually palpated pulse (within 10%). If a plethysmogram waveform is displayed, confirm that the signal corresponds to waveforms displayed in the operator's manual and that no excessive noise is present. If a pulse waveform simulator is available, verify that the oximeter displays appropriate S_p 〖O 〗_2 and pulse rates when attached to it.