Glossary
ultraviolet light
UV
undefined load
User-selected load devices that are not supplied by the legal manufacturer/reseller as a defined load with the appliance and energy harvest control system.
under-voltage
An abnormal decrease in the root mean square value of the input voltage from the nominal value for a period longer than half a cycle of the nominal input waveform.
uninterrupted
With respect to an electronic component or device, to operate continually, without pause.
United Nations
UN
United Nations Children's Fund – Supply Division
UNICEF-SD
United States Food and Drug Administration
USFDA
United States National Institute of Standards and Technology
NIST
user
The person responsible for the day-to-day operation and monitoring of the room, vehicle, appliance or installation.
user-dependent freeze protection
UDFP
Refrigeration technology that requires appliance users (e.g. healthcare workers) to perform specific actions (user-interventions) in order to ensure vaccine protection against freezing temperatures (e.g. store vaccines in baskets, away from compartment wall surfaces).
user-independent freeze protection
UIFP
Refrigeration technology that does not require appliance users (e.g. healthcare workers) to perform any specific actions (user-interventions) in order to ensure vaccine protection against freezing temperatures.
user-intervention
Any activity that is required to be executed by appliance users (e.g. healthcare workers) in order to ensure safe operation of the appliance (e.g. vaccine protection against freezing temperatures, condensation removal from compartment, etc.). Activities could include, but are not limited to, basket storage, storage compartment covers, thermostat/fuel adjustment, placement of removable compartment covers, liners or barriers, draining of condensation, charging a battery, or thermally conditioning the appliance or components thereof.
user-intervention for freeze protection
Any activity that is required to be executed by equipment users in order to ensure vaccine protection against freezing. Activities could include the addition of a removable liner to the vaccine carrier or the conditioning of icepacks before placement in the carrier.