70 The GS550 System
Maintenance
Replacing Sensor Batteries
This procedure does not apply to the GS050 anti-two-
block switch. To change the batteries of the GS050
please refer to the Replacing Anti-Two-Block Switch
Batteries section of this manual.
The following items are required:
• 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.
*
Important! Protect the interior of the anti-two-
block switch from dirt and humidity at all times.
1. Unscrew the two hex screws about a quarter of an
inch.
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.
3. The link wires of a load cell may be disconnected to
facilitate battery replacement.
4. Remove the battery by hand
5. Remove the remaining silicone from both the box and
the mounting plate.
6. Install the new battery: insert the positive end and
then push in the direction of the positive pole.
7. Reconnect the link wires if disconnected.
8. Apply the non-corrosive RTV silicone all around the
edge of the mounting plate to create a new seal with-
out bubbles or breaks.
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.
4
1
2
3
Figures: Removing the battery
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