| http://www.w3.org/ns/prov#value | - The time constants (charging and discharging) of these circuit components are such that the varying D.C. voltage (first signal) across the capacitor 47 represents the mean pressure sensed by the transducer 20 (FIGS. 1, 2A-2F) over a period of predetermined duration, a relatively long period, for example during the preceding fifteen (15) minutes or even longer (for example a number of hours) or sho
|
