VVC AUTO 85.5 - Smog Technician - Level 1 - Zirconium o2 sensor_testing
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VVC AUTO 85.5 - Smog Technician - Level 1 - Zirconium o2 sensor_testing
- 1. Passing Results Minimum Voltage (Artificially Full Lean) 0V – 175mV Maximum Voltage (Artificially Full Rich) 800mV – 1V Rise Time (Snap Throttle) < / = 100mS (from 175mV – 800mV) Test O2S with DSO Propane enrichment tool, DSO minimum voltage = 0 - 175mV maximum = 800 - 1000mV rate of change = < 100 mS (175mV - 800 mV)
- 13. = 50mV
- 14. = 50mV = 175mV
- 15. = 50mV = 175mV = 800 mV
- 16. = 50mV = 175mV = 800 mV Fail!
- 17. Using a DSO, a technician tests an O2 sensor for “rise time” by snapping the throttle and freezing the frame. The technician has set up the DSO time scale for 200mS per division, with 5 subdivisions each. When measured at the specified voltage levels, the rise time between the cursors was 3 subdivisions. What is the measured time difference, and does this O2 sensor pass the rise time test? The time difference is 120ms and it does not pass the test