Nordic ID Group
| Joensuunkatu 7 | FI-24100 Salo |Finland
358 2 727 7700 | Fax + 358 2 727 7720 | [email protected]
15 / 20
2018-04-09
Nordic ID AR82 User Guide
Version 1.2
Nordic ID AR82 reader includes sophisticated thermal management features that do prevent overheating
issues if reader is used in too warm environments. The reader monitors temperatures of onboard
computer and UHF RFID module and adjusts operation points based on the temperature information.
Onboard computer starts mitigation scheme (for example clock frequencies of CPUs are dropped) when
temperature of the onboard computer reaches 85°C.
Thermal mitigation scheme of the UHF RFID module follows following temperatures:
•
80°C – UHF RFID reading operations are suspended for 100ms. Suspend time is increased 20ms
by every °C temperature rises until the temperature reaches 90°C. The thermal mitigation
scheme is turned off once the temperature drops below 80°C. High temperature warning
message (TEMP_HIGH) is sent via NUR API to host. The warning message contains also current
temperature information.
•
90°C – UHF RFID reading operations are shut down until temperature goes below 90°C. Once
the temperature is below 90°C, above mentioned mitigation scheme is taken in use. Over
temperature warning message (TEMP_OVER) is sent via NUR API to host. The warning message
contains current temperature information.
