| 摘要 |
The invention relates to an analogue electronic thermostat (1) comprising a desired value adjuster (9), a power supply, an output stage (11) comprising a relay, means (5) for intensifying the signal and means for creating (7) a switching command for said relay, said means being used to compare the desired value that has been set in the desired value adjuster (9) with the actual value that is supplied by a temperature sensor (3) which can be attached to the thermostat (1). According to the invention, the thermostat (1) has a range detector (6) which can be used to adjust a working range of the thermostat (1) independently of its desired value adjuster (9). In addition, a differential gap detector (8) which can be used to adjust the differential gap of the thermostat (1) independently of its working range is advantageously provided. The adjustability of the range detector (6) and differential gap detector (8) is obtained in an advantageous manner by the provision of isolating points in lines. The working range and the differential gap can be determined by the disconnection or connection of said isolating points. The invention also relates to a simple constant current source (4) for delivering a constant current. The temperature sensor (3) is operated using said current source. |
