HMP operating environment

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HMP specification

Operating conditions HMP350, HMP300 HMP200 HMP130, HMP100
Operating ambient temperature 32ºF - 104ºF / 0ºC - 40ºC 32ºF - 104ºF / 0ºC - 40ºC
Storage temperature -4ºF to 122ºF / -20ºC to 50ºC -13ºF to 113ºF / -25ºC to 45ºC
Relative humidity 10-90% non-condensing 10-90% non-condensing
Maximum altitude 10,000ft / 3,000m 10,000ft / 3,000m
Internal temperature sensor Yes Yes No


  • The HMP devices should not be installed & operated in direct sunlight, nor stacked one on top of the other. The HMP200 in particular will be very susceptible to overheating if it is too close to other HMP devices.
  • Different environmental factors can affect the drift induced by the internal clock of the player.
  • If you need to power down the HMP, it is strongly recommended to follow the procedure detailed on the "Power off the HMP" page.

Internal temperature

Starting with the HMP200 model, the HMP devices are featuring an internal temperature sensor that monitors the device internal board temperature (note that this is not the external case temperature, nor the ambient temperature). This temperature is displayed within Control Center under:

"Technical note"
The internal board temperature can also be retrieved through the HMP Status API and get_info RPC command.

Shutdown temperature

The HMP device automatically shuts down when its internal temperature reaches the selected shutdown temperature level, in order to cool down. The device will automatically restart when the internal temperature in less than the threshold value.

To modify the shutdown temperature, follow theses steps:

  1. Open Control Center interface and go to:
  2. Set the "Shutdown temperature" option to either:
    • "Normal" (default value)
      This corresponds to a maximum of 55ºC / 131ºF and is meant to prevent the external HMP case becoming too hot to touch.
    • "Maximum"
      This corresponds to a maximum of 70ºC / 158ºF and is meant to prevent any physical damage of HMP internal components. This is needed when the content is complex and / or ambient temperature is usually above 30ºC / 86ºF, but note that the external HMP case might exceed 50°C / 120°F.
  3. Click on the "Apply" button.

Setting the shutdown temperature to "Maximum" might have as result an external case temperature of the HMP exceeding 50°C / 120°F and therefore, touching the HMP case might provoke an injury!
This page was last modified on 10 February 2016, at 12:29.