Maintenance - Gilson PLC 2050 User Manual

Maintenance

the eLSD is designed to require a minimum of maintenance activities. if preventive
maintenance activities are followed, the detector should provide high sensitivity
measurements without any further intervention by the operator.
General Maintenance Recommendations
● maintain the eLS detector in a clean laboratory environment.
● if the eLS detector will not be used for one hour, flush out any mobile phase that contains
acids, bases, or salts to prevent foreign matter deposits on components or instrument
corrosion.
● only use clean, particle- and oil residue-free gas.
NOTICE
after each run and before shutting down the PLC Purification System, the eLS detector
should be cleaned to ensure good performance. follow the preventative maintenance steps
below to clean the eLS detector after the final anaysis:
1. allow the mobile phase to continue flowing after analysis to flush any remaining particles
from the detector. the mobile phase should not contain any additive or buffer.
2. incrementally increase the temperature to dissolve any remaining deposits.
3. Stop the mobile phase flow, but allow the gas to flow for at least 30 minutes to prevent
particle deposit.
● if needed, stop the gas flow at the source.
● if needed, shut down the system.
The time required for each step depends on the application, so solvent type and sample
concentration should be determined accordingly. Access the inside of the instrument is not required
for routine operation. If the suggestions provided in this chapter do not remedy the problem,
contact your local Gilson representative. Refer to
NOTE
The LED has a long but finite lifetime (5000 hours) and should be replaced periodically by trained
personnel. Decreasing light intensity from a failing LED will result in decreasing signal heights.
Contact your local Gilson representative to replace the LED.
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PLC with inteGrateD eLSD ConfiGuration PLC with inteGrateD eLSD ConfiGuration
Closing the gas supply while the pump is still running may result in serious nebulizer
damage.
If the ELS detector will not be used for one hour, close the shut-off valve on the splitter to
avoid clogging the nebulizer or depositing foreign matter into the detector.
Customer Service
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PLC 2050/2250/2500 PurifiCation SyStemS PLC 2050/2250/2500 PurifiCation SyStemS
on page 19.