Auto-Escape Feature
An upper limit auto-escape feature acts as a safety feature of the unit. This safety feature is always on. If the sensor detects over 200 ppm ethylene, the F-950 will auto-escape from monitor mode to prevent poisoning the electrode in the ethylene sensor. This will stop the measurement.
If the sensor becomes poisoned, it will continually auto-escape with the error message "sensor out of bounds". If this message appears, connect the external conditioning tube filled completely with potassium permanganate (KMnO4) to the inlet/outlet of the F-950. Allow time with the instrument powered on (Continuous Mode) to remove the high concentration of ethylene in the instrument.