HTA HT2800T - Bar Code Reader Troubleshooting

HT2800T_en_c.doc Page 230 of 275
8.19.2.4 Carry over issue
Possible causes Solutions
Type or number of washes are
inappropriate
Check if the washing modalities are suitable for your specific application.
The solvent is almost finished If the solvent level is too low, the needle cannot reach it. Top up the
solvent vial. If the waste vial is almost full, replace or empty it.
Syringe is dirty or worn If there is dirt in the syringe or the plunger is sticking, clean the syringe
according to the manufacturer's cleaning instructions.
Samples are immiscible. In this case the washes should not rinse properly the syringe. Increase the
wash number or use solvent that can rinse different types of samples.
8.19.2.5 Signal/Peak issue
No signal/No peak
Possible causes Solutions
Syringe plunger is not working
properly
Check that the plunger is secured by the plunger locker. See paragraph
4.2.2 “Setup: Syringe warmer assembly installation/ replacement
(Headspace mode)”.Check if the syringe needle is plugged. If so,
replace or clean the syringe.
Sample volume is insufficient If the sample level in the vial is too low, the needle cannot reach it (see
paragraph 3.7.1). Increase the sample volume in the vial or change
needle draw depth inside the sample vial (see paragraph 4.2.1.5).
Sample is viscous
Increase the viscosity delay (see paragraph or dilute the sample in a
proper low viscosity solvent.
Injection depth too high Ensure the needle goes deep enough into the GC.
8.20 Bar Code Reader Troubleshooting
Problems Possible causes/solutions
Bar Code not readable Check the horizontal orientation of the Bar Code lines.
Check the Bar Code length.