METHODE FOR OPERATING A MEASURING SYSTEM FOR THE DETERMINATION OF THE CONTENT OF COMBUSTIBLE GASES

摘要

A method for operating a measuring system for the determination of combustible gases in a gas mixture comprising an indicating unit, a measuring device, a detector element and a controllable compensator element is to be improved in such a way that the power consumption is minimised. To achieve the object, the detector element (4) is supplied with the detector operating current ID in a first operating phase in the standby state, while the compensator element (3) is operated with a compensator partial operating current IK1 and a first measuring signal U1 for the purpose of gas analysis is formed from the voltages UD across the detector element (4) and the compensator element (3), and in a second operating phase, the compensator element (3) is connected to the compensator operating current IK from a switch-on time t0 to the time t1 in a partial heating phase and the steady-state final value of the compensator voltage UK (ts) is extrapolated at the end of the heating phase from the rise in the compensator voltage UK (t) in the time interval t0 to t1 using a processing function and a second measuring signal U2 is formed with the extrapolated final voltage UK(ts) and the voltage UD across the detector element (4) for the purpose of gas analysis. ……