| 摘要 |
<p>#CMT# #/CMT# The diagnostic circuit (100) has a multiplexer (106) selecting different signals, and a microcontroller (107) controlling at least the multiplexer. A supply voltage (108) is provided for the microcontroller. The diagnostic circuit is configured to detect a change in the supply voltage on the basis of a comparison of the supply voltage with a stored supply voltage reference value of the supply voltage by utilizing the multiplexer and the microcontroller. #CMT# : #/CMT# An independent claim is also included for a method for monitoring an analog-digital converter circuit during an input of a measured value of at least one of a level gauge, a pressure gauge and a flowmeter. #CMT#USE : #/CMT# Diagnostic circuit for monitoring analog-digital converter circuit during input of measured value of at least one of level gauge (claimed), pressure gauge (claimed) and flowmeter (claimed). #CMT#ADVANTAGE : #/CMT# Provides for improved analog-digital conversion during input of measured value of level gauge, pressure gauge or flowmeter. Provides diagnostic circuit which makes it possible to detect drifts of resistances and of reference voltages, as well as a faulty analog-digital converter or program execution error of microcontroller. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic two-dimensional representation of a diagnostic circuit for monitoring an analog- digital circuit during the input of a measured value of a level gauge, a pressure gauge or a flowmeter. 100 : Diagnostic circuit 101 : Flowmeter 106 : Multiplexer 107 : Microcontroller 108 : Supply voltage.</p> |
