What is the dissipation loss for a pressure transmitter?

The term ? Sadly ? can be found in the info sheet for a pressure sensor or pressure transmitter. One needs this specification to become able to protect the pressure sensor from overheating.
In case a pressure sensor is operated in a hot environment, it can be necessary to limit its electrical energy. If one neglects this aspect, one possibly risks an overheating sufficient reason for this, in the worst case, a total failure of the instrument. So how can the correct electrical connection be managed?
Determination of the right electrical connection on the basis of the dissipation loss
First, the utmost permissible electrical power for the pressure sensor must be known. This is given in the info sheet as the dissipation loss. Please be aware that the dissipation loss could be dependent upon the maximum expected operating temperature of the instrument and must be calculated where necessary.
If the allowable dissipation loss has been determined correctly, then the actual maximum electrical power for the pressure sensor that occurs could be determined. The determination can be carried out expediently in two steps:
1. Determination of the voltage at the pressure transmitter using the following formula:
UPressure transmitter = UVoltage source ? RLoad � Imax. Current supply
2. Calculation of the utmost electrical power for the pressure transmitter through the next equation:
PPressure transmitter = UPressure transmitter � Imax. Trauma for the pressure transmitter (PPressure transmitter), that is now known, should be smaller than the permissible dissipation loss. If this is the case, both the power (UVoltage source) and the load (RLoad) were properly calculated and the electrical power of the pressure sensor will undoubtedly be within the permissible range under all operating conditions. Consequently, the pressure transmitter won’t heat too strongly and will withstand the mandatory operating temperatures.
Note
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