What preparatory step should be performed before installing the memory card in the First Defender RMX?

What preparatory step should be performed before installing the memory card in the First Defender RMX?

• A. Shut down the detector
• B. Power on the detector
• C. Remove all cables
• D. Unlock the access door

Answer: (A)

Shutting down the detector puts the device in a safe, non‑energized state so the memory card can be inserted without the risk of data being written, the interface being damaged, or the system trying to access the card mid-install. With power off, the hardware is static and stable, allowing proper seating and recognition of the card when you power the unit back up. Installing a card while the unit is on can lead to data corruption or hardware errors, and other steps like removing cables or unlocking the door aren’t reliable safety measures on their own until the device is first shut down. After powering down, you can proceed with the memory card installation according to the manual.

Shutting down the detector puts the device in a safe, non‑energized state so the memory card can be inserted without the risk of data being written, the interface being damaged, or the system trying to access the card mid-install. With power off, the hardware is static and stable, allowing proper seating and recognition of the card when you power the unit back up. Installing a card while the unit is on can lead to data corruption or hardware errors, and other steps like removing cables or unlocking the door aren’t reliable safety measures on their own until the device is first shut down. After powering down, you can proceed with the memory card installation according to the manual.