Welch Allyn MicroTymp® 4 Tympanometer
User Manual
DIR 80024157 Ver A Page viii
DEVICE SYMBOLS
The following symbols appear on the tympanometer, the instrument cradle or the mains adapter:
Definition: Consult operating instructions.
Definition: Type B applied part – an applied part providing protection against
electric shock, particularly regarding allowable patient leakage current and patient
auxiliary current.
The applied part is the ear tip.
Definition: The output from the mains AC adapter is Direct Current.
Definition: Class II equipment – equipment in which protection against electric
shock does not rely on basic insulation only, but in which additional safety
precautions such as double insulation or reinforced insulation are provided,
there being no provision for protective earth connection or reliance upon
installation conditions.
USB Definition: Industry-standard Type-B USB connection to a computer.
Definition: printer connection.
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