PT630D User Reference Guide
unitech Electronic CO. LTD
Unitech Part Number: 400412
12
Chapter 2 Power System
2.1 Power System
Main Power
The terminal is operated by a rechargeable, 3.6V 880mAH 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 vary, it is possible to result a shorter operating hours.
Backup Power
An onboard 3V 190mAH Lithium battery (CR2032) 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, PT630D 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 PT630D 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
3 years
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 PT630D 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. Meanwhile the unit continues to back-up the data
contents in RTC and RAM, but 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.
! WARNING!
MAIN BATTERY
VOLTAGE LOW
! WARNING!
Backup BATTERY
LOW
