10.2.5 Replacing the ne safety lter
To replace the lter, proceed as follows:
• Loosen the two lid screws on the back of the unit. Push the lid about 2 cm towards the rear
panel. You can then lift the lid upwards.
• Remove the hoses from the lter.
• Remove the old lter.
The lter must be disposed of as residual waste.
• Insert the new lter.
When installing the lter, make sure that the arrow on the lter points in the gas ow
direction.
• Push the cover back onto the housing and screw tight.
10.2.6 Maintenance work on the bench-top unit
10.2.6.1 Emptying the condensation trap
Proceed as follows:
1. Switch o the pump by pressing the <PUMP> key.
2. Loosen the condensation trap on the front of the analyzer by tilting it slightly, and pull
downwards carefully.
3. Empty the trap and dispose of the condensate according to the composition of the sample
gas.
4. Push the condensation trap on again from below.
CAUTION
Condensate in the analyzer
If condensate is spilled onto the analyzer during this process, it can penetrate into the analyzer
through gaps in the housing.
Such an analyzer is not suitable for measurements, and therefore must not be used any longer!
10.2.6.2 Replacing the coarse lter
Proceed as follows for this:
1. Switch o the pump by pressing the <PUMP> key.
2. Loosen the condensation trap on the front of the analyzer as described in section Emptying
the condensation trap (Page 171).
3. Remove the contaminated lter.
Service and maintenance
10.2 Maintenance work
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012 171
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