Page 286 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

Components Test Results
Diode 1 Measure continuity. Forward. (ohm meter scale: Rx1000) Normal: Below 100
Some inexpensive 2 Measure continuity. Reverse. (ohm meter scale: Rx1000) ohms
ohm meters may Abnormal infinite
indicate infinite Normal:Infinite.
resistance in both
directions Abnormal: Below 100
ohmss
Relay 2 1 Measure continuity. (ohm meter scale: Rx1) Power Open Close

2 Remove the lead wires and operate oven at power level 1 leavel
through power level 10. 1 4 Sec 18 Sec
2 6 Sec 16 Sec
3 8 Sec 14 Sec
4 10 Sec 12 Sec
5 12 Sec 10 Sec
6 14 Sec 8 Sec
7 16 Sec 6 Sec
8 18 Sec 4 Sec
9 20 Sec 2 Sec
10 22 Sec 0 Sec
Ventilation motor 1 Remove lead wires.
2 Measure resistance. (ohm meter scale: Rx1) Normal:
Turbo speed: White and Brown Turbo speed:
Approximately
20-25ohms

High speed: White and Blue High speed:
Approximately
40-45ohms
Low speed: White and Violet Low speed:
Approximately
50-55ohms
Slow speed: white and Yellow Slow speed:
Approximately
60-65ohms

TurnTable motor 1 Remove wire leads. Normal:
2 Measure resistance. (ohm meter scale: Rx1000) Approximately 2.5 to 3.5
Kohms
Abnormal:
Infinite or several

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CITS : Power - Electrician & Wireman - Exercise 103 CITS : Power - Electrician & Wireman - Exercise 103