Thermo Scientific Vanquish Installation Manual page 36

6 • Troubleshooting
Volume estimation
Symptom
Jump in the volume
estimation
No volume
estimation
Page 36
Possible cause
Initial volume estimation
switched to the calibrated,
actual solvent reservoir/
waste container volume
The solvent monitor was
already calibrated when the
dipstick was moved in the
solvent reservoir/waste
container.
The hydrostatic pressure has
not yet been measured.
Self-calibration of the waste
channel is not yet finished.
Remedial actions
No remedial actions necessary
Background information: After you start using the
solvent monitor or after having entered a new nominal
volume, the solvent monitor calculates the volume
based on various assumptions. After sufficient
throughput, the solvent monitor switches to show the
calibrated, actual volume. The volume may differ by
±15%.
1. Make sure that the dipstick stands straight in the
solvent reservoir/waste container and that the end
cap is placed on the bottom of the solvent reservoir/
waste container.
2. Start the pump flow and wait until the self-calibration
has finished.
After you start using the solvent monitor or after
having changed a solvent reservoir/waste container,
the solvent monitor needs about 20-60 seconds per
channel for an initial hydrostatic pressure
measurement.
1. Wait a few minutes for a volume estimation to
appear.
2. If it does not appear, check the Audit Trail.
Self-calibration of a partially filled waste container is
time consuming (approximately 5 hours) and could
have been interrupted by a movement of the waste
container or of the dipstick.
Empty the waste container. A volume close to 0 mL
should be shown within the next minutes which will
increase during pump flow. The solvent monitor will
self-calibrate during operation.
Or:
1. Check whether the dipstick is firmly attached with the
retaining guide and is straight, whether the end cap is
placed on the waste container bottom, and whether
the waste container stands on a stable surface.
2. Check the waste level manually and start a
measurement. After 25% of the waste container
volume throughput, the actual volume should be
shown.
3. During calibration and operation, do not move the
dipstick or the waste container.
Solvent Monitor
Installation Guide