Waters 717plus - Running a Compressibility Test

Operating the Autosampler 90
4
Pressure Decay Time
Sets the length of time the system pauses before recompressing the mobile phase in the
sample loop. The default value is sufficient for most applications. The longer the decay
time, the more rigorous the test.
Compressible Volume
The default value is sufficient for most applications. Changes to the compression limit are
dependent on the solvent used for the mobile phase. If the mobile phase is highly
compressible, increase the compression limit setting (see Appendix C,
Reproducibility and
Solvent Degassing).
Performing a Compression Check
To perform a compression check, press the keys indicated in Figure 4-8.
Figure 4-8 Running a Compressibility Test
Range 0.0 to 3.0 min
Default 0.2 min
Range 5 to 30 µL
Default 20 µL
PURGE
Edit: Purge and Compressibility
Purge Time (min) :
Compression Check?
Compression Pressure (psi) :
Pressure Decay Time (min) :
Compressible Volume ( 1) :
Pressure Change (psi)
Compressed Volume (psi)
Start
Purge
1.0
Yes
30
0.2
20
1.0
No
30
0.2
20
TP01953
Main Page
Purge
Page
Start
Purge
Yes No
Main
Page