Power Down And Storage; Removing Buffered Mobile Phase; Powering Down - Waters 717plus Operator's Manual

7. If the compression check still fails, perform a leak test
Test).

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
the Autosampler).
3. Replace the needle wash solvent with 90 percent methanol 10 percent water, and
perform a needle wash prime
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
1 mL/min.
2. Purge the autosampler
3. To power down the autosampler, press
(Section 3.5, Priming the Needle Wash
(Section 3.4.1, Purging the
1/0 (on/off).
(Section 6.4.2, Valve Leak
(Section 3.4.1, Purging
Pump).
Autosampler).
Power Down and Storage
3
75