The term ?dissipation loss? are available 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 really is essential to limit its electrical power. 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?
Determination of the right electrical connection based on the dissipation loss
First, the utmost permissible electrical energy for the pressure sensor should be known. That is given in the data 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 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. Current supply
The maximum electrical energy for the pressure transmitter (PPressure transmitter), which is now known, should be smaller than the permissible dissipation loss. If this is the case, both the power supply (UVoltage source) and the strain (RLoad) were properly calculated and the electrical energy of the pressure sensor will be within the permissible range under all operating conditions. Consequently, Disgusting will not heat too strongly and will withstand the mandatory operating temperatures.
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