| 摘要 |
1473888 Testing electrical apparatus AUSTRALIA DEPT OF INDUSTRY & COMMERCE 26 July 1974 [30 July 1973] 33245/74 Heading G1U [Also in Divisions F4 and H2] A built in test circuit for a portable high intensity battery lamp, see Division F4, includes a control unit 6 remote from the lamp 3. With the "on-off" switch SB open and the switch SC in the main unit closed, the closing of test switch SA coil cause diode D2 to glow if the device is in order for operation, there being no diode glow if there is a fault in the connections. However, an additional test feature is that if all the connections are correct but there is a break in the light source filament or connection thereto, then the diode D2 will glow momentarily when the switch SA is first closed. |
