Managing an operating mode of a wearable health monitor

A method comprising:

• obtaining test criteria for a monitor configured to be attached to a user;
• obtaining reference data;
• determining, based on the test criteria and the reference data, a detached state of the monitor;
• wherein the determining the detached state comprises performing a set of tests indicated in the test criteria, the set of tests comprising:
• a first test corresponding to a first power consumption by the monitor, and
• a second test different from the first test, the second test corresponding to a second power consumption by the monitor, the second power consumption being larger than the first power consumption;
• issuing a notification regarding the detached state after the second test is carried out;
• receiving, in response to the notification, a verification of the detached state;
• and
• automatically modifying, in response to the verification of the detached state, an operating mode of the monitor from an active mode to a passive mode, wherein the passive operating mode reduces power consumption of the monitor.