The term ?dissipation loss? can be found in the info sheet for a pressure sensor or pressure transmitter. One needs this specification to become able to protect the pressure sensor from overheating.
In case a pressure sensor is operated in a hot environment, it really is necessary to limit its electrical power. If one neglects this aspect, one possibly risks an overheating sufficient reason for this, in the worst case, a complete 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 maximum permissible electrical power for the pressure sensor must be known. Vigorous 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 executed expediently in two steps:
1. Determination of the voltage at the pressure transmitter utilizing the following formula:
UPressure transmitter = UVoltage source ? RLoad � Imax. Unbelievable . Calculation of the utmost electrical energy 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 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 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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