The term ?dissipation loss? can be found 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 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 right electrical connection be managed?
Determination of the correct electrical connection based on the dissipation loss
First, the utmost permissible electrical power for the pressure sensor should be known. That is given in the info sheet because 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 your actual maximum electrical energy for the pressure sensor occurring can be determined. The determination can be carried out expediently in two steps:
1. Determination of the voltage at the pressure transmitter utilizing the following formula:
UPressure transmitter = UVoltage source ? RLoad � Imax. Devastating . Calculation of the maximum electrical power for the pressure transmitter through the following equation:
PPressure transmitter = UPressure transmitter � Imax. Authority for the pressure transmitter (PPressure transmitter), which is now known, should be smaller than 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 will withstand the mandatory operating temperatures.
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