The term ?dissipation loss? can be found in the info 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 usually is essential to limit its electrical energy. If one neglects this aspect, one possibly risks an overheating and with this, in the worst case, a complete failure of the instrument. So how can the right electrical connection be managed?
pressure gauge octa of the correct electrical connection on the basis of the dissipation loss
First, the utmost permissible electrical energy for the pressure sensor must be known. This is given in the data sheet as the dissipation loss. Please note 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 power for the pressure sensor that occurs can 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 ï¿½ Imax. Current supply
2. pressure gauge of the utmost electrical energy for the pressure transmitter through the next equation:
PPressure transmitter = UPressure transmitter ï¿½ Imax. Current supply
The maximum electrical energy 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 supply (UVoltage source) and the load (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.
Should you need any advice, your contact will gladly assist you to.