Humanscale T7 - Manual (Page 36)

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7.0 POWER SYSTEM OvERvIEW
Please read the following details regarding the T7 Point-of-Care Technology
Cart’s power system before operation.
7.1 INITIAL SYSTEM STARTUP ANd SHUTdOWN
Before the T7 can be used for the first time, the battery module must be fully charged. When shipped from the factory, the
battery module is disconnected from the electronics portion of the system for storage. To reconnect the system, locate the
cart’s power cord and plug it into a powered hospital-grade wall receptacle. Locate the on/off switch where the power cord
enters under the work surface. Push the (minus) - sign. Locate the circuit breaker on the underside of base cover in between
the front left wheel and the rear left wheel. Push the circuit breaker. Upon doing so, the LEDs that are located to the right
of the display will light up. Depending on the length of the time the cart was in transit or in storage, you may get a different
configuration of lights (see Section 7.3 Battery Level Indicator). To turn display on, locate on/off switch under rear left side of
work surface when facing the front of the cart. Push and hold on switch for several seconds until you hear a click and a beep.
At this time, the display will illuminate and go through a boot-up process and to the main height adjust screen.
To power system down, repeat the process mentioned above in the exact reverse order. (Step 1) Press and hold switch
located on the underside of work surface left rear when facing the front of the cart. (You will hear a click and a beep, and
display will turn off.) (Step 2) Pull out breaker (until white stem is exposed) on underside of base cover in between left front
and left rear wheel. (Step 3) Locate on/off switch located where power cord enters underneath work surface push on 0 to turn
switch off. Note: if the T7 is not in use for a short period of time, this procedure must be followed to ensure that the battery
will not be run down to the state of making the cart inoperable.
When operating the T7 with the AC plug connected to a socket, do not position the unit so it is difficult to disconnect
from the wall or reach the AC switch in the event of an emergency
7.2 PROPER POWER SYSTEM RECHARGING
To prolong the T7’s power system and condition the battery for optimal performance, always charge the battery fully. To
recharge the T7, simply plug the power cord into a hospital-grade receptacle. The cart has started its charging cycle once the
BLI lights strobe from bottom to top (note: initially all of the LEDs may be dark or only the red LED illuminated). For maximum
battery utilization and long life, the cart power system features a sophisticated charging system with four modes of charge:
Trickle, Bulk, Overcharge, and Float Charge. When first plugged in, the cart enters a Trickle Mode, during which a small
amount of current is fed to the battery system to determine its voltage level and state of charge. When a predetermined level
is reached, the charger automatically transitions to Bulk Mode, during which the recharge current is delivered to the battery
at maximum level to facilitate faster restoration of operation. As the battery reaches full capacity, the charger moves into
Overcharge Mode to ensure that maximum charge is returned to the battery. The charger then enters a Float Charge Mode for
long-term maintenance of the charge level until power is drawn from the system.
Tips to Optimize Your Battery
• Do not let the battery drain to a fully discharged state (which you will be alerted to by a sound and a red indicator on the dashboard next
to the screen). If the battery reaches a discharged state, this will potentially damage the life of the battery. If possible, plug the T7 in
frequently to keep the charge as strong as possible and prevent a fully discharged state.
• Always fully charge the battery. Do not stop charging until the battery has reached a full charge.
• Do not store the battery in a discharged state. If possible, keep the T7 plugged in when not in use.