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AssigneeAVL List GmbH
InventorsCHRISTOS BERGER, SLAVEN DODIG, MARTIN AUGUSTIN, ROBERT DIEWALD, GÜNTER WINKLER, VERENA VESCOLI, MICHAEL KRÜGER
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In order to effectively protect a particle measuring device (8) against temperatures that are too high and/or too low, it is provided that the temperature (T) of the sample gas is measured upstream of a first temperature-sensitive sample gas processing or sample gas measuring device (20, 21, 22, 42) in the particle measuring device (8) and that the measured temperature (T) is compared with a first and/or second limit value (To, Tu) and that the particle measuring device (8) is switched into a safe mode if the measured temperature (T) exceeds the first limit value (To) or falls below the second limit value (Tu).
A method for operating a particle measuring device (8), comprising a number of sample gas processing and/or sample gas measuring devices (20, 21, 22, 42), to which particle measuring device particle-laden sample gas at a temperature (T) is fed, characterized in that the temperature (T) of the sample gas is measured upstream of a first temperature-sensitive sample gas processing or sample gas measuring device (20, 21, 22, 42) in the particle measuring device (8), and that the measured temperature (T) is compared with a first and/or second limit value (To, Tu) and that the particle measuring device (8) is switched into a safe mode if the measured temperature (T) exceeds the first limit value (To) or falls below the second limit value (Tu).
A particle measuring device comprising a number of sample gas processing and/or sample gas measuring devices (20, 21, 22, 42) and a temperature sensor (4) which is arranged upstream of a first temperature-sensitive sample gas processing or sample gas measuring device (20, 21, 22, 42) in the particle measuring device (8) and which detects the temperature (T) of the sample gas, and a control unit (3) compares the detected temperature (T) with a first and/or second limit value (To, Tu), and the control unit (3) switches the particle measuring device (8) into a safe mode if the measured temperature (T) exceeds the first limit value (To) or falls below the second limit value (Tu).
Dependencies are inferred from the claim text.