CPC Pressure Sensor: Inspection
- Check that the CPC pressure sensor has no deformation, cracks or other damages.
- Connect the dry-cell battery positive terminal to terminal No. 3 and the dry-cell battery negative terminal to terminal No. 1, and connect the circuit tester positive terminal to terminal No. 2 and the circuit tester negative terminal to terminal No. 1.NOTE:
- Use new dry-cell batteries.
- Using a circuit tester, check that the initial voltage of each dry-cell battery is 1.6 V or more. And also check that the voltage of three batteries in series is between 4.8 - 5.2 V.
- For power supply, 5 V DC constant voltage power source can also be used.
- Check the voltage at a normal atmospheric pressure.NOTE: The atmospheric pressure at higher altitude is lower than normal. Therefore, the voltage is lower than the standard value.
Terminal No. Standard 2 (+) - 1 (-) Approx. 3.6 V (when 25°C (77°F)) - Connect the Mighty Vac to the pressure port (A) of CPC pressure sensor.
- Check the voltage when generating vacuum using Mighty Vac.CAUTION: Do not apply a vacuum that exceeds -50 kPa (-0.5 kg/cm2 , -7.2 psi). Doing so may damage the CPC pressure sensor.NOTE: When vacuum occurs at the pressure port of CPC pressure sensor, the voltage will drop from the value as in step 3.
| Pressure | Terminal No. | Standard |
|---|---|---|
| -50 kPa (-0.5 kg/cm2 , -7.2 psi) | 2 (+) - 1 (-) | Approx. 2 V (when 25°C (77°F)) |