RB750UP Temperature measurement

Hardware MikroTik hardware general
1

Hi,
Please provide correct data for temperature range. This request is similar to:
http://forum.mikrotik.com/t/rb433-temperature-specs-inconsistent-or-missing/58951/2

If you look in users manual of many, many appliances or devices there is data for a) storage temperature, and b) operating temperature.
Maybe you have not this data, you a hiding data or, devices are not tested in different environmental, or something else???
Looking for ICs on the board everybody can see that ICs is for commercial temperature range (not industrial).
Please provide to as correct specs. for temperature and rel. humidity.

Please can you explain how temperature is measured on RB750UP (I think that measured values is not correct).
I can read with command that temp. is 43°C.
After applying hot air to board (plastic housing started to soften) I was able to read temperature 50-57 °C (and after reached 57°C the RB750UP was rebooted).
Touching board I believed that temperature is higher.
After this I put RB750UP in freezer for 1 hour (<0°C). Attached board to power, and to PC (board is staying in freezer). After 1 min I provided temperature reading and there is shown 38°C.
Touching board I believed that board temperature is below 10°C (or even 0°C).

Thanks

2

Random units of production batch is selected and tested in chamber to measure operational temperatures (potential range is enough to mimic the harshest temperature ranges on planet. Also, thermal measurement is done in ATTiny, and temperature there can be different from temperature elsewhere on the router.

3

Janisk, thank you for response.
Reading temperature on RB750UP means board temperature measured with ATTiny.

Please can you check values received with command “system health”, and real temperature measurements.

I made 4 measurements.

a) RB750UP at room temperature.
-Reading (“system health”) temperature = 43°C
b) RB750UP in oven with fan. Oven temperature setting = 50°C (15min).
-Reading (“system health”) temperature = 47°C
c) RB750UP in oven with fan. Oven temperature setting = 80°C (15min).
-Reading (“system health”) temperature = 54°C

  • see attached image => RB750UP is working but plastic case deformed.
    d) RB750UP in freezer for 1 hour (<0°C).
    -Reading (“system health”) temperature = 38°C

750UP_80°C.jpeg

4

we will see to it. With holidays coming, most probably next year.