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Water Sensor Battery Installation – Visonic MCT-550 What You’ll Need • MCT-550 SMA Water Sensor • A Philips-head screwdriver • One CR2 battery • Double-sided tape (optional) How to Install the Battery Before proceeding, please be sure that your system is disarmed. Working on devices while the system is armed can generate false alarms.
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Take a Look. If a battery is already present, remove it by gently pulling the end of the ribbon up until the battery is loose and you can pull it free from the battery slot. 3. Insert a CR2 battery into the battery slot, matching the positive (+) end of the battery to the positive (+) placement indicator located in the slot.
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