(GC) Starting the GC after the Hydrogen Generator has turned off

In the event of the hydrogen generator turning off either due to running out of water or a possible power cut, you will need to replace the water and press the start button on the gas generator to start to the flow of hydrogen to the instrument.

Once you've done this, check the 'primary pressure' on the GC screen. To find the primary pressure, press the home button, go to the inlet/injection, then this parameter is usually found on page 2. The primary pressure needs to exceed 400 kPa - if the reading is less than this, then there is likely not enough hydrogen being supplied to the GC and you may need to wait for the lines to pressurise.

If there is sufficient H2 being supplied then you just need to clear any errors, and start the GC up again. (Home button > GC start/stop sequence > start GC). This should start the GC flow controller and once the system stabilises, you can proceed as normal.