7

BATTERY & TIME KEEPING

A battery is used to keep time when the unit is without power. Typical

accuracy of the G308 time keeping is less than one minute per month drift. The

battery of a G308 unit does not affect the unit’s memory, all configurations and

data is stored in non-volatile memory.

To change the battery of a G308, remove power, cabling, and then the rear

cover of the unit. To remove the cover, remove the four screws designated by the

arrows on the rear of the unit. Then, by lifting the top side, hinge the cover, thus

providing clearance for the connectors on the bottom side of the PCB as shown

in the illustration below. Install in the reverse manner.

Remove the old battery* from the holder and replace with the new battery.

Replace the rear cover, cables, and re-apply power. Using Crimson or the unit’s

keypad, enter the correct time and date.

* Please note that the old battery must be disposed of in a manner that

complies with your local waste regulations. Also, the battery must not be

disposed of in fire, or in a manner whereby it may be damaged and its contents

come into contact with human skin.

The battery used by the G308 is a lithium type CR2025.

CAUTION: RISK OF ELECTRIC SHOCK

The inverter board, attached to the mounting plate, supplies the

high voltage to operate the backlight. Touching the inverter

board may result in injury to personnel.

CAUTION: The circuit board contains static sensitive

components. Before handling the operator interface without the

rear cover attached, discharge static charges from your body by

touching a grounded bare metal object. Ideally, handle the

operator interface at a static controlled clean workstation. Also,

do not touch the surface areas of the circuit board. Dirt, oil, or

other contaminants may adversely affect circuit operation.

WARNING - EXPLOSION HAZARD - THE AREA MUST BE

KNOWN TO BE NON-HAZARDOUS BEFORE SERVICING/

REPLACING THE UNIT AND BEFORE INSTALLING OR

REMOVING I/O WIRING AND BATTERY.

WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT

EQUIPMENT UNLESS POWER HAS BEEN DISCONNECTED

AND THE AREA IS KNOWN TO BE NON-HAZARDOUS.