| 摘要 |
<p>A flame detection circuit and method using a flame probe (1,3), across which an alternating voltage is applied, is described. The means for applying an alternating voltage comprises a pair of terminals (5,17) for connection across the two rails of an A.C. supply. A pair of resistors (19,21) are connected across the terminals, with an A.C. current path being provided between the node between the resistors (19,21) and the flame probe (1,3), the resistance of each of the resistors (19,21) being equal. <IMAGE></p> |
