Performing The Sparge Valves Test; Performing The Gradient Proportioning Valve Test - Waters 600E Installation And Maintenance Manual

3. Press Enter to proceed to the next test.

5.3.7 Performing the Sparge Valves Test

This test identifies whether a malfunctioning sparge line is due to electronics or
sparge-valve failure. Perform this test if you do not see any bubbles when the 600E system
sparges eluents.
1. Press Enter.
2. Check for bubbling in the eluent reservoir as each sparge valve is activated. Also
listen for the individual clicking of the sparge valves (as they open and close).
3. Press Enter to proceed to the next test.

5.3.8 Performing the Gradient Proportioning Valve Test

Test Summary
The gradient proportioning valve test identifies whether incorrect eluent proportioning is
due to electronics or valve failure. Perform this test if you are observing that percentage of
eluent flow from any reservoir appears to be incorrect, resulting in nonreproducible or
incorrect eluent gradients and retention times.
Procedure
To perform the Gradient Proportioning Valve test:
1. Press Enter.
2. Listen for the individual clicking of the proportioning valves (as they open and
close).
Note: If eluent proportioning remains incorrect after performing this test, the
problem may be with the valve. Check all tubing and fittings for leaks and
restrictions. Eluent viscosity must not differ significantly among the eluents being
mixed.
To perform additional testing of the proportioning valve, refer to
Advanced 600E Pump
3. Press Enter to proceed to the next test.
Testing.
Performing 600 Controller Extended Test Routines 101
Section 5.4,