The term ?dissipation loss? are diaphragm seal in the info sheet for a pressure sensor or pressure transmitter. One needs this specification to become in a position to protect the pressure sensor from overheating.
If a pressure sensor is operated in a hot environment, it might 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. Just how can the right electrical connection be managed?
Determination of the right electrical connection on the basis of the dissipation loss
First, the maximum permissible electrical energy for the pressure sensor must be known. That is given in the data sheet because the dissipation loss. Please note that the dissipation loss can be dependent upon the maximum expected operating temperature of the instrument and must be calculated where necessary.
If เพรสเชอร์เกจ has been determined correctly, then your actual maximum electrical power for the pressure sensor that occurs can 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 next equation:
PPressure transmitter = UPressure transmitter � Imax. Current supply
The maximum electrical power 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 (UVoltage source) and the strain (RLoad) were properly calculated and the electrical power of the pressure sensor will 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.
Note
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