User's Manual

GM550 v1043 FCC-IC.doc Revision 2 67

Maintenance

Replacing Sensor Batteries

All Sensors Except the GS050 Anti-Two-Block Switch

What Is Needed

• A hex key 5/32 in. (approximately 3.97 mm)

• A flat bladed screwdriver

• One (1) new high quality “D” cell battery: 3.6 V lithium, or alkaline

• RTV non-corrosive silicone

Tip: A 3.6 volt lithium “D” cell battery will provide about two years of battery life for a load cell,

while an alkaline “D” cell battery will provide less than one year of battery life.

Step 1. Unscrew the two hex screws about a quarter of an inch.

Step 2. Insert the flat bladed screwdriver in the battery cover notch to pry the box away from

the mounting plate. The silicone seal may cause some resistance.

Step 3. The link wires of a load cell may be disconnected to facilitate battery replacement.

Step 4. Remove the battery by hand

Step 5. Remove the remaining silicone from both the box and the mounting plate.

Step 6. Install the new battery: insert the positive end and then push in the direction of the

positive pole.

Step 7. Reconnect the link wires if disconnected.

Step 8. Apply the non-corrosive RTV silicone all around the edge of the mounting plate to

create a new seal without bubbles or breaks.

Step 9. Reposition the box over the mounting plate and screw in the hex screws. Do not over-

tighten.

Actual battery life will vary greatly depending on the application, the frequency of use, the age and

quality of the battery etc.

1 2

Figures: Removing the old battery