TECHNICAL INFORMATION
19
87-900-120-01 (A)
Management of filter elements
The PHD-4 is fitted with two different filter elements: the
internal glass wool filter and the sintered filter.
Replacement of the Glass wool filter
1. Remove the housing, as described above.
2. Position the inside block of the PHD-4 on a flat
surface able to support its weight, positioning it so
that the lower part is accessible (sampling/filter
zone).
3. Holding
filter
A
still, turn fitting
B
fitted on the top
by ¼ of turn.
4. Remove the saturated filter
A
pulling this delicately
in an upward direction.
5. Exerting a slight pressure, insert a new filter.
6. Position the fitting on the top of the new filter and
secure it with a ¼ turn in a clockwise direction.
Maintenance of the sintered filter
The sintered filter is positioned on the top of the
analysis probe and can be accessed removing the
sampling nozzle (see figure). This filter is also
accessible with the housing fitted.
1. Extract
probe
A
from its housing.
2. Unscrew the sampling cone
B
on the top of the
probe.
A
B
A
B
B
A
