Determination of ambient temperature when specifying requirements for instrument bidding
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Available meteorological data: Annual average temperature: 13.5℃; Annual highest temperature: 42.5℃; Annual lowest temperature: -19.0℃; Average winter temperature: -2.0℃; Average summer temperature: 26.9℃. Does the ambient temperature for the instruments refer to the range of -2.0～26.9℃?
This is general data, and it is correct to provide it. But it is best to specify the requirements for the specific location separately; the data sheet also includes information on the medium temperature, which can affect the selection of the instrument as well
For normal operating conditions, there is no need for such strict accuracy; some error is inevitable
I understand that the ambient temperature for the instrument is between -19 and 42.5°C; it is necessary to take into account the fact that the instrument may malfunction when the ambient temperature is low
I think the ambient temperature of the instrument is -19 to 42.5℃
The ambient temperature for the instrument is between -25 and 60°C, and most devices can meet this requirement.
Unless you go to Siberia, in normal areas the temperature is around -25 degrees; however, with more extreme weather conditions in recent years, temperatures as low as -40 degrees could be a possibility.
For industrial field instruments, when there is no display screen, the design temperature of the instrument’s circuit board should generally be in the range of -40 to 85°C. When a display screen is present, the design temperature of the circuit board should generally be between -20 and 60°C... There are also display heads that can operate at low temperatures of -30°C, -40°C, or -55°C, but these are not common; those capable of operating at -55°C are also very expensive.
It should be noted, however, that the accuracy of the instrument is determined by the nominal temperature of 20°C, which refers to the condition in which the instrument operates at an environment temperature of 20°C... Refer to relevant **standards and international standards. When the actual operating temperature of the instrument deviates from the nominal temperature, especially by a significant amount, it is necessary to take into account the temperature error of the instrument – often this temperature error is much greater than the instrument’s basic precision error
:learned handshake*