Thermodynamic pressure/temperature transducer health check

A method of in situ testing a pressure transducer comprising the steps of:

• measuring a first internal pressure in a fitting at a first internal volume of the fitting using the pressure transducer;
• changing the internal volume of the fitting to a second internal volume to change the internal pressure to a second internal pressure;
• measuring the second internal pressure in the fitting using the pressure transducer;
• comparing the measured first and second internal pressures to historical pressure reading;
• and
• sealing an input of the fitting prior to measuring the first internal pressure.

A method of in situ testing a pressure transducer comprising the steps of:

• measuring a first internal pressure in a fitting at a first internal volume of the fitting using a pressure transducer;
• changing the internal volume of the fitting to a second internal volume to change the internal pressure to a second internal pressure;
• measuring the second internal pressure in the fitting using the pressure transducer;
• comparing the measured first and second internal pressures to historical pressure readings;
• and
• calculating a sensitivity, repeatability and hysteresis for the transducer using the measured internal pressures.

A method of in situ testing a pressure transducer comprising the steps of:

• measuring a series of first internal pressures in a fitting at a first volume of the fitting using the pressure transducer;
• measuring a series of second internal pressures in the fitting at a second volume of the fitting using the pressure transducer;
• and
• analyzing and comparing the measured series of first and second internal pressures to historical data.

A method of in situ testing a pressure transducer comprising the steps of:

• measuring a series of first pressures in a fitting at a first volume of the fitting using the pressure transducer;
• measuring a series of second internal pressures in the fitting at a second volume of the fitting using the pressure transducer;
• and
• analyzing and comparing the measured series of first and second internal pressures to historical data;
• wherein analyzing comprises determining sensitivity, linearity, hystersis, or repeatability of the transducer.