Dear Emerson Support
I need to confirm the calculation of Long Term Stability of 3051SCD2 Ultra Differential Pressure Transmitter. The datasheet says:
±0.15% of URL for 15 years;
for ±50 °F (28 °C) temperature changes,
up to 1000 psi (68.95 bar) line pressure
I'm a little confused about how to calculate it. So simple way is to do 0.15% of URL and that will be for 15 years. but how to consider temperature changes and line pressure changes as mentioned above?
Regards
The stability specification allows for variation in both ambient temperature and static pressure as defined in our literature. Within those limitations, the output will be stable to within 0.15% of URL for 15 years.For simplicity, we often direct customers to use linear interpolation to determine stability over shorter time-frames, which means after 5 years you would expect 0.05% of URL. If you are looking to determine a calibration interval for your installation, I have added a link to a white paper that provides guidance for that calculation.
Calibration Interval Technical Note