Endress+Hauser analytikjena multi N/C UVHS Operating Manual page 95

multi N/C UVHS, multi N/C pharma UV
Error
Cause
¡ The measuring gas flow is below the
range of 140 ml/min.
Error
Cause
The measuring gas flow drops below the
¡
minimum flow during measurement
pauses. The UV lamps switches off for
safety reasons.
¡ Lamp does not switch on despite correct
gas flow. UV lamp defective
Error
Cause
¡ Selected sample volume too large.
¡ Number of measurements too high.
Error
Cause
¡ Flushing reservoir insufficient.
Error
Cause
Dosing faulty.
¡
The dosing syringe is leaky.
¡
¡ Instable reagent addition.
Inhomogeneous samples.
¡
¡ Sensitive samples can be affected by
ambient air.
NDIR-based drift:
¡
Unsuitable integration criteria.
The software ends measurement too
early.
UV lamp does not switch on during initial-
ization
Remedy
¡ Check the gas flow, see Status errors.
UV lamp switches off during operation
Remedy
Check the gas flow, see Status errors.
¡
¡ Inform customer service and have the
UV module replaced.
Minimum sample volume > vessel volume
Remedy
¡ Check and adjust the sample volume,
flushing volume and number of determi-
nations settings in the method.
Flushing water insufficient (for sample feed
with autosampler)
Remedy
¡ Check and adjust the sample volume and
backwash settings in the method.
Scattering measurements
Remedy
Check the dosing.
¡
Ensure that samples are drawn in with-
¡
out bubbles.
¡ Check that enough sample is provided.
¡ Install a new dosing syringe.
¡ Ensure that reagents are drawn in with-
out bubbles.
¡ Take the reagent blank value into ac-
count.
¡ Adjust the purge flow for reagents.
Check that sufficient reagent is provided.
¡
Insert the hose further into the reservoir
¡
bottle.
Filter samples prior to analysis.
¡
Stir samples prior to injection. To do
¡
this, use an autosampler with stirring
function.
¡ Prevent the addition of CO
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.
Check the method settings.
¡
¡ If necessary, increase the maximum in-
tegration time.
Troubleshooting
or organic
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