The term ?dissipation loss? can be found in the data sheet for a pressure sensor or pressure transmitter. Shaking needs this specification in order to be able to protect the pressure sensor from overheating.
If a pressure sensor is operated in a hot environment, it could be essential to limit its electrical energy. If one neglects this aspect, one possibly risks an overheating and with this, in the worst case, a complete failure of the instrument. Just how can the right electrical connection be managed?
Revenge of the correct electrical connection based on the dissipation loss
First, the maximum permissible electrical energy 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 maximum expected operating temperature of the instrument and should be calculated where necessary.
If the allowable dissipation loss has been determined correctly, then your actual maximum electrical energy for the pressure sensor occurring could be determined. The determination can be executed 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 following equation:
PPressure transmitter = UPressure transmitter � Imax. Current supply
The maximum electrical energy for the pressure transmitter (PPressure transmitter), which is now known, must be smaller compared to 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 will not heat too strongly and can withstand the mandatory operating temperatures.
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