Method for recognizing sensor poisonings and test station for carrying out the method

US9063105B2 · kind B2 · utility

Assignee

• DRÄGER SAFETY AG & CO. KGAA · DE

Inventors

• Malte Berndt · Lübeck, DE
• Dirk Zastrow · Lübeck, DE
• Sven Schimmel · Bad Schwartau, DE

Key dates

• Filing date: May 15, 2014
• Grant date: Jun 23, 2015
• Expiry date: May 15, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/0072
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for recognizing sensor poisonings in portable gas-measuring devices with a test station having a main unit with a control and analysis unit and test modules connected with the main unit for data exchange with an connected device. The test station recognizes device model and/or gas sensor model of the connected device. The main unit has gas inlets for different test gases and there is a first gas feed line for sending test gas to the test modules and a second gas feed line for sending purging gas to the test modules and a gas drain line to return gas from the test modules to the main unit. The method includes detection of a first measured value and of a second measured value and determination of sensor poisoning on the basis of the two values. The test station control and analysis unit carries out the method.