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

6. If the compression exceeds the default compressible volume, degas the mobile
phase and run the compression check again.
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 (see
Purging 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 (see
3. To power down the autosampler, press
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
(Section 6.4.2, Valve Leak
(Section 3.5, Priming the Needle Wash
Section 3.4.1, Purging the Autosampler).
1/0 (on/off).
Power Down and Storage
3
Section 3.4.1,
Pump).
70