Prepare the autosampler for maintenance:
Turn off the pump flow. Wait until the system pressure is down to zero before you continue the shutdown of the autosampler.
To empty the drain pump, leave the drain pump turned on until no condensing water is present in the waste tubing. After that, turn off the drain pump and remove the peristaltic tubing from the drain pump. Any liquid that is present in the drain pump tubing flows off to waste.
Move the needle into service position and secure the needle unit. See Securing the Needle Unit.
Disconnecting Metering Device Head Capillaries
Disconnect the injection valve capillary from the front port of the metering device head.
Disconnect the pressure sensor capillary from the bottom port of the metering device head.
If capillaries are to be reinstalled, protect the open ends of the capillaries with caps.
Connecting Metering Device Head Capillaries
Connect the injection valve capillary to the front port of the metering device head.
Connect the pressure sensor capillary to the bottom port of the metering device head.
To enable easier access, the pressures sensor fixing screw can be loosened and retightened.Complete the autosampler maintenance:
Unlock the needle unit. See Unlocking the Needle Unit.
Restart the autosampler.
Prepare the autosampler for operation. See Preparing the System for Operation.