| 摘要 |
FIELD: measuring equipment. ^ SUBSTANCE: device is implemented in the form of three-electrode condenser connected to primary signal processing unit. First (multisection) and second (single-section) electrodes 3, 6 are insulated from media which interface border levels are measured, and third electrode 7 has electric contact to the media. It allows interface border level measurement for several dielectric and conductive media in grounded tanks or tanks isolated from ground. Placement of switching elements 11 and address decoders 12 in sensitive element in direct vicinity of respective sections 4 of first electrode allows for elimination of ghost parametre effects of construction on error and measurement result stability, and for actual delimitation of section 4 number. Special construction of third electrode 7 with electric contact to media and instrument case reduces edge effect on interface border level measurement error. Use of tanks of two sections 4 below interface border and of two sections 4 above media interface border eliminates edge effect on measurement error. ^ EFFECT: extended application sphere due to possibility of device application in interface border level measurement for several dielectric and conductive media in grounded tanks or tanks isolated from ground, and reduced media interface border level measurement error. ^ 5 cl, 8 dwg |
