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Aer 5400
10) Filter sealing mechanism
At first remove the both locking screws (7) from the axles. Now, both coils can be detached. The
empty fresh filter coil acts as new coil for the exhausted part of the filter. When inserting the coil,
take care for correct fitting of the tappet (A) at the axle and the slot (B) at the coil (picture below).
A
B
Attach the lock screws again after inserting the fresh filter coil too. Make sure that the fresh filter coil
can be turned without strain.
Now, the filter tape can be inserted as shown in the picture. Please take care for the correct
guidance. In case of a standard instrument with open face air inlet the access can be simplified by
removing the filter sealing plate (the plate can be shifted to left). In addition, the detector head can
be slewed sideward if the knurled screw to fix the swivel arm has been removed before. Feed the
filter tape into the slot between filter support (4) and filter sealing plate (9) in case of an instrument
with tube connector.
The filter has a smooth and a rough side. The smooth side must point
towards the detector head. Make sure that the tape runs at the outer
side of the both optical detectors (5). Check if the filter tape will be
tightened between coil and filter support by the filter tension (3). Fix
the end of the filter tape with a piece of duct tape at the empty coil
(pic. right).
Insert the filter sealing plate (9) into the notches of the filter support (4)
in case of a standard instrument. Shift it to the right to the final position
(centred with the filter support). Take care that the mark on the filter
sealing plate points in direction of the hatch.
Before starting an aerosol sampling use the cycle "Insert filter" to wrap the filter tape a few times
around the coil. This procedure shows whether the tape runs correctly through the stepper drive or
not. Finally, the front hatch can be closed.
SARAD GmbH 2023
Manual_Aer 5400_EN_27-04-2023.docx
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