Agilent Technologies 8860 User Manual page 80

5 Maintenance and Troubleshooting
Chromatographic symptoms
Peak Areas Not Repeatable
1 There may be a restriction or leak in the selector system.
2 Refer to the GC troubleshooting manual to screen the GC system.
Low Peak Area or Height (Low Sensitivity)
1 There may be a restriction or leak in the selector system.
2 Refer to the GC troubleshooting manual to screen the GC system.
Contamination or Carryover
1 Make sure the vent outlet is not end capped.
2 Check for sample carryover from previous runs. Try to use the
3 Run the
4 Remove all the gas bags from the selector. Run
5 Clean or change the filters. (See
6 Refer to GC troubleshooting manual to screen the GC system.
To check the chromatographic symptoms for cylinder version
Peaks Not Displayed/No Peaks
1 Check if the Selector is connected correctly to the GC.
2 Check that the actuator gas supply is connected correctly to the Air/N
3 Check if needle valve fitting on the back of the Selector is tightly closed.
4 Check the sample pressure of the cylinder and make sure it has a pressure of at
80
(See Restriction and leak check
(See Restriction and leak check
on the Maintenance tab when connecting sample bags to the selector.
Purge mode
ghost peaks/carryover go away or get smaller.
purging the whole system using N
or get smaller. (See Sweep mode
on the back of the Selector and confirm the supply pressure is 380 kPa (55 psi).
least 1 bar.
Agilent Gas Sample Selector for 8860 and 8890 User Manual
on page 82).
on page 82).
in maintenance, purging the system using N
to see if the ghost peaks/carryover go away
2
on page 74).
Replace gas filter for bag version
Sampling mode
to see if the
2
Sweep mode in maintenance,
on page 62.)
fitting
2