Note •If the HI-PRO2 unit is connected to the PC via a USB hub, the hub must
be self-powered (have a separate power supply). This is to ensure that the USB
hub can deliver enough current for proper operation of the HI-PRO2 unit.
3.3 Starting up HI-PRO2
When the HI-PRO2 Installation CD is installed, HI-PRO2 powers on as soon as the
unit is connected to the PC and the PC is powered ON.
During power-up, the LEDs next to the connectors on the front panel will flash
once indicating that a brief self-test is in progress.
When the self-test is completed, only the power LED will light. If only the left LED
flashes, the self-test has failed and you should try powering on again. Should the
unit fail again, contact your local distributor.
The HI-PRO2 connector LEDs will also light up when a hearing instrument is being
programmed, indicating which side is active.
The LED above the text ‘PC Com’ lights up to indicate communication with the PC.
Caution •Do not attempt to connect or disconnect a hearing instrument
while the connector LED is active! The LED indicates that the connector is act-
ive, and this might damage the hearing instrument.
Caution •Even though the hearing instrument connectors on the front of the
HI-PRO2 are galvanically insulated from the PC and mains earth, it is still pos-
sible to release an electrostatic discharge (ESD) to a connected hearing instru-
ment, and through the HI-PRO2 to earth. An electrostatic discharge can be
very uncomfortable for the client because it feels like a minor "electric shock",
and can even produce loud pulses of noise. Cases of electrical damage to hear-
ing instruments have been reported. It is recommended to install the unit in
an environment that minimizes the amount of static electricity. For example,
anti-static carpeting is recommended.
3.4 Disconnecting HI-PRO2 from the PC
HI-PRO2 automatically powers off together with the PC, but if you wish to power
off the HI-PRO without powering off the PC, you can disconnect the USB cable from
8 Otometrics - HI-PRO2
