Before the Patient Session
ST80i Stress Test System Instructions for Use 3-13
The wireless PIM can also be commanded by the host application to transmit on a
user-selected channel to manually override the automatic system driven settings to avoid
wireless interference. See the ST80i Installation and Configuration Guide for information on
configuring a wireless channel for communication.
The wireless PIM shows the following information:
Wireless signal quality indicator:
Wireless performance and signal strength are monitored on the currently used RF channel.
The wireless PIM’s signal quality icon indicates the connection status. If a channel has
excessive interference, the wireless PIM will automatically determine a clearer channel
with higher signal strength and coordinate with the Advanced Interface Module (AIM) to
switch to the new channel.
Lead-off indication for every lead:
ST80i recognizes when an electrode is not connected and displays that information on the
graphic of a human torso on both the wireless PIM and ST80i interface.
Power indication for battery:
The wireless PIM is battery-powered and the battery voltage is monitored to ensure that
the battery is not overly discharged. The remaining battery capacity is displayed in the
wireless PIM’s power indicator lights within the battery icon. These lights blink every 5
seconds when the PIM is in use.
In addition, when all patient leads are being connected prior to a test, a low-battery alert
warns if there is not enough capacity in the battery to complete test.
ST80i also provides an audible and visual alert on the application screen as a warning that
the battery is discharged to the point where PIM is expected to shut down shortly.
The wireless PIM uses off-the-shelf (OTS) disposable AA alkaline batteries for its power
source. For the disposable AA battery, the system has been designed to provide approximately
one week of battery service life for a “typical” user environment. .
CAUTION ST80i only supports 1.5V AA alkaline batteries for the PIM. Replace the battery if a low-battery alert
appears before the stress test starts.
CAUTION If you use off-the-shelf rechargeable AA-size batteries, the remaining capacity indication may be
inaccurate.
CAUTION If you use OTS rechargeable batteries, you will need to provide a compatible recharger unit for their
batteries that is independent of the ST80i. To ensure safe use and adequate maintenance of
rechargeable batteries, follow the battery manufacturer’s instructions for use.
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