How to make a test protocol for ATX power supplies
- 1. Get a small power resistor( 1 ohm preferred)
- 2. Do not trust on the amount of resistance which is shown on the power resistor. Measure its resistance by a multimeter.
- As you see, on the power resistor is shown 0.5 ohm; however, it is actually 1.7 ohm.
- 3. Connect one of the resistor's legs to 3.3 volt binding post.
- 4. Connect the other leg of the resistor to the red lead of a multimeter, and put the red lead into the 10ADC jack,the topmost jack. And put its selector on 10A.
- 5. Plug in the power supply and record the current shown on the multimeter.
- 6. Change the binding post to 5 volt.
- 7. Repeat step 6 for 12 volt binding post.
- 8. Make a table and put the records on it
ATX Power Supply Test Protocol
| Resistance(Ω) | Voltage (volt) | Current (Amp) |
|---|---|---|
| 1.7Ω | 3.3 v | 2.36 amp |
| 1.7Ω | 5 v | 3.84 amp |
| 1.7Ω | 12 v | 13.07 amp |