Chapter 2 Power System; Power System; Power Low Indication - Unitech HT630 User Manual

2.1 Power System

Main Power
The terminal is operated by a rechargeable, 3.7V 900mAH rated Li-Ion, battery pack. The main battery
should be sufficient for daily operation up to 12 hours. (Base on 5 scan per second) However, since the actual
operation may be varied, it is possible to get the shorter result than our standard operation hours.
Backup Power
An onboard Lithium battery is used as the secondary power source to back up the data; the RTC (real time
clock chip) and RAM memory to prevent data-loss free environment.
Normally, the HT630 gets power from main power source to back-up RTC and RAM; also puts the Lithium
battery in standby state. When the main power source is removed or below the level to back-up the RAM and
RTC properly, the power circuit of the HT630 automatically switches to the Lithium battery for back-up. It is
recommended that the main battery can be always placed inside the unit with enough capacity for back-up
purpose in which case the Lithium battery can supply the power for up to half year before consuming all its
capacity up.
It is important to know that once the power in the backup battery used up, all data within the terminal will be
lost. So it is very important to backup all data when replacing backup battery.

2.2 Power Low Indication

Main Battery
When the main power source reaches the battery low condition, a warning message as
right icon will be shown on the LCD when the HT630 is powered on or a battery low
icon sign will emerge on the right side of the LCD.
When the main battery low occurs, the main battery can continue to supply power for
about 20 ~ 40 minutes per scan /5 second; however, the unit may reach the system
power cutoff point and automatically turn it off.
in RTC and RAM; it cannot be powered up until the batteries have been recharged or replaced.
Lithium Backup Battery
When the Lithium backup battery doesn't have enough capacity to back up the
system, the message as right icon will be shown on LCD when the unit is powered
on. In this situation you should upload your data from the terminal immediately
and replace a new Lithium battery.
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Power System
Meanwhile, the unit continues to back up the data contents
8
Chapter 2
! WARNING!
MAIN BATTERY
VOLTAGE LOW
! WARNING!
Backup BATTERY LOW