Unitech PT600/630 Manuale Utente Scaricare il pdf (Pagina 11)

PT630 User Reference Guide Unitech Electronic CO. LTD

Unitech Part Number: 400263 - 4 -

Chapter 2 Power System

2.1 Power System

Main Power

The terminal is operated by a rechargeable 3.7V 880mAH rated Li-Ion battery pack. The main battery should be

sufficient to for daily operation up to 12 hours. 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 in RTC

(real time clock chip) and RAM memory to provide users a data-loss free environment.

Normally the PT630 gets power from main power source to back-up RTC and RAM and 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 PT630 automatically switches to the Lithium battery for back up. It is recommended that the main

battery 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

will be shown on the LCD when PT630 is powered on or a battery low icon sign will

emerge on the right sidebar of 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 itself 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 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

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Unitech PT600/630 Manuale Utente Pagina 11