Abnormality determination apparatus and non-transitory computer readable medium storing program

A method comprising:

• acquiring with a sensor a biological signal of a user;
• and
• with a controller:
• determining whether the biological signal is continuously outside a predetermined range for a first time period;
• after determining that the biological signal has been continuously outside the predetermined range for the first time period, then determining whether the biological signal is inside the predetermined range;
• and
• activating an alarm if it has been determined that (i) the biological signal has been outside the predetermined range for the first time period, and (ii) the biological signal has been continuously inside the predetermined range for a second time period, the second time period being longer than the first time period.

A non-transitory computer readable medium having stored thereon a program for causing a microprocessor to execute at least the following:

• acquiring with a sensor a biological signal of a user;
• determining whether the biological signal is continuously outside a predetermined range for a first time period;
• after determining that the biological signal has been continuously outside the predetermined range for the first time period, then determining whether the biological signal is inside the predetermined range;
• and
• activating an alarm if it has been determined that (i) the biological signal has been outside the predetermined range for the first time period, and (ii) the biological signal has been continuously inside the predetermined range for a second time period, the second time period being longer than the first time period.