UTi720E is equipped with an intelligentized alarm system. Once Hi/Lo Alert feature is activated, a red triangle or green inverted triangle icon will appear on the screen when the measured temperature is higher or lower than the preset values. It used to remind the users stay away from the dangerous and keep the device safe. Feature can be turned off in Settings>HI/LO Alert (It is recommended to turn on).
Why does the red triangle or green inverted triangle icon appear on the screen