Repeat steps b and c until the water exiting through the waste line tested with pH paper is 7.0. This ensures that all caustic has been removed from the system. The system is ready to be equilibrated. Turn on the instrument. Ensure the outlet tubing from the detector is attached to the inlet tubing of the detector.
System is ready.
Ensure the outlet of the injector is hooked up to the inlet tubing of the detector. Make sure you have enough caustic supply since no air should enter the system. After system stops, follow prompt for correct way of shutting down the instrument.