| 摘要 |
The invention concerns a device for testing the operability of a system for detecting heat-radiating, e.g. glowing or red-hot, particles carried in a particle stream, the device having at least two detectors spaced a certain distance apart and located on the wall of a tube through which the particle stream flows. Each detector is located in a chamber separated from the particle stream by a wall plate which is transparent to at least heat radiation. Associated with each detector is a transmitter which is also located in the chamber. Each transmitter and detector is connected to a central switching point. |
