8
3e-250 Bluetooth to RS-232 Cordless Adapter
9
User's Guide
3e-250 LED Description Table
LED
Activity
Description
Bluetooth Link Activity
Indicator
Flashing Green
No light
Indicates link activity
Indicates OFF
Battery Status Indicator
Green
Orange
Red
Battery is 75-100% charged
Battery is 25-75% charged
Battery charge less than
25%
Battery Charging Indicator
Red
No light
Charging from external
power source
No external hookup or fully
charged
Bluetooth Link Actrivity
Battery Status Indicator
Battery Charging Indicator
External Power Connector
The following chart gives the variables for the indicator lights.
Maintaining Battery Life
You can recharge the internal rechargeable batteries at any point. If
the Battery Status Indicator turns red, you should recharge at your earli-
est convenience. Plug in the 120V AC / 9V DC power adapter shipped
with the 3e-250 and charge fully (may require up to 3 hours). Recharging
should be done in conditions of less than 113 ° F (45 ° C) to ensure proper
charge.
There is an RS-232 Trickle-Charge on-off switch on the back of the
3e-250 which is provided as a discretionary battery power conserva-
tion device. The default position is OFF. And this switch should be left
in the off position if you are running the device connected to any piece
of test equipment that runs on battery power, as it will "steal" the power
from the parent device in order to "trickle-charge" the 3e-250 battery.
However, if you are running the 3e-250 on a host device that can spare
power, you can conserve battery power extensively by setting the RS-
232 Trickle-power switch to on. When the 3e-250 is charging from an AC
power outlet, the switch can be either on or off. It does not matter. See the
picture of the back of the device on the preceding page for the location of
the Trickle-Charge switch. Move the switch with a small point object like
a paper clip or pen point.
