Troubleshooting
multi N/C pharma HT
112
7.3
Device errors
This section describes a number of device errors and analytic problems, some of which
the user can rectify himself. Most of the device errors described are easy to identify.
Most of the analytic problems lead to implausible measurement results. If the suggested
solutions do not eliminate the errors/problems, and if such problems occur frequently,
contact the customer service department of Analytik Jena GmbH.
Error
Water traps clogged
Cause
Remedy
¡
The service life of the water traps has
elapsed.
¡
Measuring of samples with strong
aerosol generation.
¡
Replace the water trap.
Error
Scattering measurements
Cause
Remedy
¡
The combustion tube filling is used up.
¡
Replace the catalyst.
¡
The dosing is faulty.
¡
Check the dosing.
¡
The canula is damaged.
¡
Replace the canula.
¡
Inhomogeneous samples.
¡
Warm up cold samples before analysis.
¡
Filter samples prior to analysis.
¡
Sensitive samples can be affected by
ambient air.
¡
Prevent the addition of CO
2
or organic
vapors from the ambient air.
¡
Check the ambient conditions and rem-
edy the source of the fault.
¡
Cover the sample vessels on the au-
tosampler with aluminum foil.
¡
Treat the headspace of the sample with
gas.
¡
NDIR-based drift:
Unsuitable integration criteria.
The software ends measurement too
early.
¡
Check the method settings.
¡
If necessary, increase the maximum in-
tegration time.
Error
Autosampler does not draw in sample
without air bubbles
Cause
Remedy
¡
The sample intake path is leaky.
¡
Check the hose connections.
¡
If necessary, tighten loose hose connec-
tions to the canula or to the valve of the
syringe pump.
¡
The sample intake canula is clogged.
¡
Remove the canula and clean it in an ul-
trasonic bath.
¡
Replace the canula.
¡
The dosing syringe is leaky.
¡
The PTFE sealing lips of the plunger are
damaged.
¡
Remove and check the dosing syringe.
¡
Replace the dosing syringe.
Error
Incomplete dosing in the reactors
Cause
Remedy
¡
The dosing path is leaky.
¡
Check the hose connections. If neces-
sary, tighten the following connections:
Syringe pump to change-over valve,
change-over valve to injection canula,
change-over valve to TIC condensate
container.
