Endress+Hauser Analytik Jena Multi X 2500, Руководство по эксплуатации

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multi X 2500 Fault removal
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11.2.3 Analytical problems
Combustion at the cannula
Cause
Solution

Argon and oxygen connection on the multi-purpose
combustion tube were mixed up

Connect gases correctly (1-2 in Fig. 10, p. 23)
Low results independent of detection
Cause
Solution

Metering fault

System leaking

Temperature set too low

Wrong or unsuitable calibration

Sample loss at or before sample introduction due to
vaporization or spillage

Insufficient post-combustion period

Sooting in the system

Check metering

Check system tightness (
→
chapter 10.4.2, p. 94)

Check temperature configurations in the method

Check calibration, repeat if required

Close liquid samples
Check the sampler routine for solid samples

Particularly for solids, set a post-combustion time of
120 s in the method

Clean or replace sooted parts
Carryover
Cause
Solution

Inadequate rinsing of the sample introduction
components

Combustion tube insufficiently rinsed for EOX
determinations

Contamination within the injection port of the
combustion tube or within the ABD sluice

Rinse metering syringes prior to sampling

Rinse combustion tube with clean solvent, i.e. blank
measurements until values are constant

Replace septum, clean sluice
Scattering measured values
Cause
Solution

Metering faulty

Combustion tube contaminated or severely crystallized

Check metering

Clean or replace combustion tube