multi EA 5100
Maintenance and care
165
14.14.7 Replacing the catalyst in the TOC combustion tube
CAUTION
Risk of burns at the hot furnace
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Switch off the device and allow it to cool before performing maintenance.
CAUTION
Skin and respiratory system irritation due to quartz wool
Quartz wool tends to form dust. Irritation can occur after breathing in or skin contact
with this dust.
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Avoid the formation of dust when working with quartz wool.
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Wear protective clothing and gloves.
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Work under an extractor or wear a respiratory mask.
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If the catalyst loses effectiveness, the combustion tube must be refilled. A check has
to be performed after the maintenance interval has elapsed (max. 1500 injections).
A software message will indicate when the maintenance interval has elapsed.
ð
The service life of the catalyst depends largely on the samples. On average, approx.
1500 injections can be performed, more are sometimes possible. The service life can
be lower with especially loaded samples, especially high salt content.
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Switch off the basic modules via the power switch and allow the device to cool.
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Switch off the gas supply and disconnect the power plug from the power outlet.
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Open the doors of the basic module and remove the top cover.
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Remove the FAST connector with hose 3 from the combustion tube.
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Unscrew the knurled head screw at the fork clamp and remove the fork clamp con-
necting the outlet of the combustion tube to the condensation coil.
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Disconnect the spherical joint. The condensation coil remains in the basic module.
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Remove the tube holder for holding the combustion tube.
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Carefully pull the combustion tube out of the combustion furnace toward the top.
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Remove the screw cap with septum from the combustion tube.
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Remove the used catalyst filling.
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Check the combustion tube for heavy crystallization, cracks and burst spots. Only re-
use intact combustion tubes.
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Rinse the combustion tube with ultrapure water and allow it to dry.
ü
The TOC combustion tube is clean.
Filling the TOC combustion
tube
NOTICE
Risk of devitrification of the quartz glass due to sweat
Alkaline salts in sweat from hands leads to devitrification of quartz glass when heated.
Devitrification reduces the service life of the combustion tube.
¡
Only touch the cleaned combustion tube when wearing gloves.
