Which of the following is NOT a common cause of false alarms in an alarm system?

Stable environmental conditions are not a common cause of false alarms in an alarm system because they signify that the surroundings remain consistent and do not introduce unexpected variables that could trigger the alarm. When environmental conditions are stable, factors like dust accumulation or humidity changes are less likely to interfere with the sensors or components of the alarm system, thereby reducing the likelihood of false alarms.

In contrast, common causes of false alarms include dust accumulation, which can obstruct sensors or interfere with their operation; humidity changes, which can affect the performance of electronic components; and improper installation, which can lead to faulty connections or miscalibrated sensors. Understanding these factors helps in properly managing alarm systems and reducing the occurrence of false alarms.