Method for operating a flowmeter and flowmeter

A method for operating a flowmeter for carrying out a plurality of time-limited measuring operations, wherein the flowmeter has at least one diagnostic unit, a counter unit and a storage unit with at least one memory, the method comprising:

• determining at least an overall volume of a fluid passing through the flowmeter during one of the plurality of time-limited measuring operations with the counter unit, the counter unit being operated for the time-limited duration of the measuring operation,
• recognizing at least one erroneous or error-free state of the flowmeter by the at least one diagnostic unit, the diagnostic unit generating status messages based on the state of the flowmeter recognized,
• transmitting the status messages to the storage unit and storing the status messages in the at least one memory of the storage unit, and
• when several status messages have been transmitted to the storage unit, cumulatively storing the status message in the at least one memory of the storage unit at least for the duration of the time-limited measuring operation,
• wherein the storage unit continuously provides accumulated status messages during the time-limited measuring operation via an interface, and
• wherein the status messages are deleted from the at least one memory of the storage unit before starting another of the time-limited measuring operation.