Buchi Alltech 3300 ELSD User Manual

BÜCHI Labortechnik AG
www.buchi.com
27
TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
No LCD dis
play
Electrical problem.
Contact your local BUCHI Customer Service office
which can be found on www.buchi.com.
No peak(s) detected
Sample is below the detection limit.
Sample is volatile at current detector
conditions.
Sample is being retained on the
column.
Gain is set too low.
Autosampler needle is not pulling up
sample properly, or sample loop
blockage.
Bad laser or other electronics error.
Increase the sample concentration or
injection volume and re-inject.
Lower temperature settings are needed for
semi-volatile compounds. Refer to Section
4.6, Optimization Procedure, for details.
Use a different column for your separation.
Increase the gain value.
Repair or replace equipment as needed.
Contact your local BUCHI Customer
Service office which can be found on
www.buchi.com.
Change in peak height or loss in
sensitivity
Nebulizer, drift tube, and/or optics are
dirty.
Autosampler needle not pulling up
sample properly, or sample loop
blockage.
Bad laser or other electronics error.
Clean the nebulizer, drift tube, and optics
as needed. Following the cleaning
procedures in Sections 5.1 – 5.4.
Repair or replace equipment as needed.
Contact your local BUCHI Customer
Service office which can be found on
www.buchi.com.
Broad peaks
Leak(s) (especially between the column
and detector) present.
Tubing between column and detector is
too long or too large of an i.d..
Check for loose fittings and tighten if
necessary.
Use a shorter piece of 0.005 - 0.010" i.d.
tubing.
Cut
-
off peaks
Sample concentration too high.
Gain set too high.
Decrease sample concentration until peaks
are on-scale.
Reduce gain value until peaks are on-
scale.

Buchi Alltech 3300 ELSD Specifications

General

Brand	Buchi
Model	Alltech 3300 ELSD
Category	Security Sensors
Language	English