초록

A calibration apparatus and associated method for the measurement of valuable fluids in storage or at the point of transfer. More particularly, a calibration apparatus and method for use with capacitive liquid level measurement systems.

대표청구항 ▼

Multiple unit fluid level sensor system for use in measuring fluid levels in a plurality of fluid-containing tanks, comprising: (a) a plurality of fluid level sensor modules, each of which includes (i) a bottom sensor segment and at least one upper sensor segment, (ii) means for fixedly mounting one

Multiple unit fluid level sensor system for use in measuring fluid levels in a plurality of fluid-containing tanks, comprising: (a) a plurality of fluid level sensor modules, each of which includes (i) a bottom sensor segment and at least one upper sensor segment, (ii) means for fixedly mounting one end of said sensor module within a fluid containing tank, and (iii) at least one fluid sensor calibrator, wherein each sensor segment includes a respective calibrator channel cable and each calibrator includes an associated calibrator channel cable, and each sensor module includes at least one sensor drive cable; (b) a plurality of source means for supplying an alternating-current drive voltage to each sensor module, and a plurality of signal processing channel means for producing a signal level related to the proportion of fluid within each respective segment, and for producing a signal level related to the proportion of fluid within each respective calibrator included with the sensor module; (c) switching network means for selectively making connection to the sensor segment and calibrator channels; and (d) computer means including input/output means, data storage means, display means, arithmetic and logic unit means, and central control unit means, all capable of cooperating under programmed control; wherein said source means supplies a voltage to the fluid level sensor module and to the calibrator via an input cable, said processing means receives a signal related to the sensed fluid level via an output cable for each measurement channel and each calibrator channel, and such signals are processed and stored by the computer to provide corrected output displays and corrected segment and total measurements related to specific sensor channels and tank fluid levels.