Waters 717plus - 3.8 Power Down and Storage

Power Down and Storage 75
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7. If the compression check still fails, perform a leak test (Section 6.4.2, Valve Leak
Tes t ).
3.8 Power Down and Storage
If the mobile phase contains buffers, remove the buffers before power down and storage.
This section describes:
• Removing the buffered mobile phase
• Powering down the 717plus Autosampler
• Long-term storage
3.8.1 Removing Buffered Mobile Phase
Remove the mobile phase containing buffer salts as described below:
1. Replace the buffered mobile phase with a solution of 100 percent water, and flush
the sampling system for 10 minutes at 1 mL/min.
2. Run three purges to ensure that the syringe is well-purged (Section 3.4.1,
Purging
the Autosampler).
3. Replace the needle wash solvent with 90 percent methanol 10 percent water, and
perform a needle wash prime (Section 3.5,
Priming the Needle Wash Pump).
4. Replace the water with a solution of 90 percent methanol and 10 percent water.
Flush the sampling system for 3 minutes at 1 mL/min.
5. Purge the autosampler.
3.8.2 Powering Down
This section covers procedures for powering down the Waters 717plus Autosampler for 1
to 14 days.
1. If the current mobile phase is water, replace the water with a solution of 90 percent
methanol and 10 percent water. Flush the sampling system for 3 minutes at
1mL/min.
2. Purge the autosampler (Section 3.4.1,
Purging the Autosampler).
3. To power down the autosampler, press 1/0 (on/off).