| 摘要 |
A monitor 6 for the return electrode 10, 20, 30, 40, 50 of electrosurgery apparatus has three contacts P1, P2, EN in a socket 60 that connect with two or three contacts on a plug 13, 23, 33, 45, 55 connected to the return electrode. One pair of contacts P2 and EN in the socket 60 is connected across an oscillator 103 that provides an output to a first primary winding 104 of the transformer 105 when there is a low impedance between the contacts. Another pair of contacts P1 are P2 is connected across a second primary winding 108 and produces a loading on the transformer when short circuited by the return electrode. A detector 113 is connected to the secondary winding 112 of the transformer and produces an alarm and disable signal if the signal on the secondary winding falls below an upper limit or exceeds a lower limit. |
