The term ?dissipation loss? are Vanquish in the data sheet for a pressure sensor or pressure transmitter. One needs this specification in order to be in a position to protect the pressure sensor from overheating.
In case a pressure sensor is operated in a hot environment, it really is essential to limit its electrical power. 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 right 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. That is given in the info sheet as the dissipation loss. Please be aware that the dissipation loss can be dependent upon the utmost 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 energy for the pressure sensor that occurs can be determined. The determination can be executed expediently in two steps:
1. Sincere of the voltage at the pressure transmitter utilizing the following formula:
UPressure transmitter = UVoltage source ? RLoad � Imax. Current supply
2. Calculation of the maximum electrical power for the pressure transmitter through the next equation:
PPressure transmitter = UPressure transmitter � Imax. Current supply
The maximum electrical energy for the pressure transmitter (PPressure transmitter), that is now known, should be smaller compared to the permissible dissipation loss. If this is actually the case, both the power supply (UVoltage source) and the strain (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 can withstand the required operating temperatures.
Note
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