It will be necessary to occasionally replace the battery within the sensor. When done properly, this is a simple process. Please follow ALL instructions from either the video or steps.
A. #1 and #2 size Phillips screwdrivers
B. CR2450 3V Lithium Coin Battery
C. A thin, wooden, or plastic tool such as a popsicle stick or a plastic knife.
**Static Discharge Warning** - Replacing a battery requires handling a circuit board. Circuit boards can be damaged from electrical static discharge during handling. To reduce this risk, follow the best practices listed below
- ALWAYS avoid direct contact with the circuit board by ONLY handling the edges of the board or holding the metal battery terminal during the entire replacement process.
- Electrically grounding yourself to discharge static electricity before handling the sensor. One example is to touch a metal object that is either touching the floor or touching a series of items leading to the floor. (e.g., A metal table or microwave)
- Avoid wearing clothing that gathers static easily. This includes items such as jackets that are fuzzy, wool clothing, etc.
Overview of Sensor Parts
Please review the image below showing the interior of the sensor before proceeding. Refer back when needed.
Part A. Blue Circuit Board
Part B. Sensor Chip
Part C. Metal Battery Casing
Part D. CR2450 3V Lithium Coin Battery
Part E. A screw used to connect the circuit board to the black sensor casing
Part F. Black sensor casing
Battery Replacement Steps
1. Use the #2 Phillips screwdriver to unscrew the two outer screws holding the case together. Open the sensor case.
2. Using the #1 Phillips screwdriver, unscrew the small screw (Part E) which holds the circuit board (Part A) to the sensor case. It is recommended (but not required) that this screwdriver have a magnetic tip to avoid having to use fingers to grab the screw and increase the chance of a static discharge.
3. Remove the circuit board by grabbing the metal battery casing (Part C) and pulling the board out, being careful to avoid touching the board itself.
4. While handling the board by the edges only, use a wooden or plastic tool to slide the battery (Part D) downward, out of the battery casing. These tools MUST be used to avoid static discharge that could damage the circuit board or battery.
5. Insert the new battery into the battery casing. You may use your hand to insert this new battery.
a. Note that the positive side of the battery coin indicated with the positive (+) symbol is facing upward.
6. Replace the circuit board so that the silver sensor chip (Part B) is lined up with the hole on the side of the black sensor case.
7. Replace the small screw (Part E) to reattach the circuit board to the sensor case. Make sure that the screw is snug but not too tight which could cause the circuit board to crack.
8. Replace the outer screws on the sensor case
9. Repeat the Process for as many sensors as you need to replace batteries, remembering to ground yourself and avoid static discharge on the circuit boards.