| 主权项 |
1. A method for recognizing sensor poisonings of one or more portable gas-measuring devices, the method comprising the steps of:
providing a test station comprising a main unit including a control and analysis unit, a plurality of test modules connected with the main unit, each of the test modules for operative connection with one of the portable gas-measuring devices for data exchange, wherein the test station has device model recognition means for detecting at least one of a device model and gas sensor model of the gas sensor of the gas-measuring device operatively connected to a respective test module, wherein the main unit has a plurality of gas inlets, each of the inlets for one of different test gases, and wherein the test station has a first gas feed line, through which test gas is sent to the test modules, a second gas feed line, through which a purging gas is sent to the test modules, and a gas drain line, through which gas can be sent back to the main unit from the test modules; connecting at least one gas-measuring device to one of the test modules of the test station; recognizing at least one of the model of the gas sensor of the gas-measuring device connected and the device model of the gas-measuring device connected by the device model recognition means of the test station; transmitting, the recognized at least one of the gas sensor model and the device model of the gas-measuring device connected, to the control and analysis unit; selecting a first test gas, suitable for the gas sensor model of the gas-measuring device connected, by the control and analysis unit; connecting a gas inlet, of the plurality of gas inlets, through which the selected test gas can be fed, to the first gas feed line; feeding the first test gas to the test module, to which the gas-measuring device is connected; detecting a first measured value of the gas sensor of the gas-measuring device; one of purging and not purging the gas-measuring device and the gas sensor by means of a purging gas, which is sent through the second gas feed line from the main unit to the test module, into which the gas-measuring device is connected; selecting a second test gas suitable for the gas sensor model of the gas-measuring device connected by the control and analysis unit; connecting the gas inlet, of the plurality of gas inlets, through which the selected second test gas can be fed, to the first gas feed line; feeding the second test gas to the test module, to which the gas-measuring device is connected; detecting a second measured value of the gas sensor of the gas-measuring device; and determining whether sensor poisoning is present on the basis of the first measured value detected and the second measured value detected, wherein the first test gas contains a gas that is to be measured during the operation of the gas-measuring device at a first, known concentration and the second test gas contains the gas to be measured at a second, known concentration, which is different from the concentration of the gas in the first test gas. |
