3.3 Features
• Warning for the appliance to be ON.
• Selection for 250V or 500V on the insulation resistance test.
• Null function for the protective conductor resistance test.
• Warning for the over range value in the LCD.
• Capable of judging pass/fail of tests by LED on the panel and by buzzer.
3.4 INSTRUMENTS LAYOUT
⑴ Test socket ⑵ Terminal block ⑹ LCD
Terminal Block
⑿
⑴ Test socket
Insert the mains plug of DUT to this socket for the polarity test of protective
conductor resistance, insulation resistance and Leakage current test.
⑾ SELECT switch
⑶ ⑷ ⑸
— 5 —
Fig. 3
⑺ LED for test result
⑻ Start/Stop switch
⑼ Null/250V-500V
switch
⑽ Function switch