Probe arrangement for temp. measurement of aircraft jet engine gases - uses additional compensation probes mounted in series with measuring probe with different time constants

摘要

The compensation device is used when measuring the temp. of gases flowing from an aircraft jet engine using a probe placed in contact with the gases. The system uses one or more pairs of correcting probes mounted in opposition and in series with the measuring probe. The first probe of the pair, mounted closer to the measuring probe, has a time constant which is twice that of the measuring probe. The second probe has a time constant approximately equal to that of the measuring probe. In one application measuring the temperature of a flowing gas using thermocouples, two hot junctions (11,12) are added to the measuring hot junction (10). Each wire connecting two junctions is different from the previous one.