Welch Allyn REF 29400 - Manual (Page 10)

Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E
9
Communication Cable Assembly
The communication cable is provided only for loading the Welch Allyn OAE Hearing Screener
internal firmware or for downloading data to a computer. Communication takes place through a
serial port or USB port and requires connection to a computer.
To connect the communication cable, align the connector on the communication cable to the
connector on the left side of the Welch Allyn OAE Hearing Screener box.
1. After verifying the connectors are properly aligned, slide the communication cable connector
end securely into its matching connector on the Welch Allyn OAE Hearing Screener box.
2. Insert the opposite end of the communication cable into the appropriate port (USB or Serial)
on the computer.
Battery
Welch Allyn OAE Hearing Screener (29400/29401) uses either a lithium ion battery or an AC
charger as a power source. When fully charged, the battery will last for approximately three hours
of continuous testing. The auto OFF feature conserves battery life by turning the Welch Allyn
OAE Hearing Screener off after approximately 180 seconds of dormancy. When the system turns
off automatically, the user presses the ON button to turn the system on again. If the battery
becomes depleted, the LCD display will briefly flash a LOW BATTERY message before the Welch
Allyn OAE Hearing Screener automatically turns off.
To recharge the battery, plug the charger unit into the +6V DC connector on the left side of the
Welch Allyn OAE Hearing Screener box and the power cord into an AC outlet. A green LED on
the front of the Welch Allyn OAE Hearing Screener illuminates when the charger is plugged in.
The AC charger can fully recharge the system battery in approximately three hours. The system
can be used to perform tests while it is plugged into the charger. While the charger is plugged in,
it will recharge the batteries between tests and the LCD will display a message continuously.