Vital information measurement device

A vital information measurement device comprising:

• an input terminal to which a biosensor is connected;
• a display;
• and
• a processor configured to:
• apply voltage to the input terminal;
• measure a measurement value based on a value of electric current flowing in the biosensor;
• measure a first measurement value and a second measurement value based on a value of the electric current flowing in the biosensor when the voltage is applied to the biosensor through the input terminal before a biological sample is supplied to the biosensor, and the second measurement value is a value measured after the first measurement value is measured;
• perform a first determination and a second determination to determine whether the biosensor is usable based on results of the first determination and the second determination and the display to display information indicating that the biosensor is usable or unusable for measurement before the biological sample is supplied to the biosensor;
• compare the first measurement value with a first threshold value;
• and
• compare the first measurement value or the second measurement value with a second threshold value, wherein the second threshold value is smaller than the first threshold value.