What’s the dissipation loss for a pressure transmitter?

The term ?dissipation loss? are available in the data sheet for a pressure sensor or pressure transmitter. One needs this specification in order to be able to protect the pressure sensor from overheating.
In case 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 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 correct electrical connection on the basis of the dissipation loss
First, the utmost permissible electrical energy for the pressure sensor should be known. This 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 must 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 can be determined. The determination can be carried out expediently in two steps:
1. diaphragm seal 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 energy for the pressure transmitter through the following equation:
PPressure transmitter = UPressure transmitter � Imax. Current supply
The maximum electrical power for the pressure transmitter (PPressure transmitter), that 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 energy of the pressure sensor will be within the permissible range under all operating conditions. Consequently, ไดอะแฟรม ซีล won’t heat too strongly and can withstand the required operating temperatures.
ไดอะแฟรม ซีล
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