Operating Instructions GM35
Probe Model
Maintenance
8009389/07-2006 © SICK MAIHAK GmbH • Germany · All rights reserved 71
ATTENTION
Correct handling when maintaining the filter
‡ Avoid creating dust clouds to prevent the system from becoming contaminated.
‡ Do not use any detergents, since deposits will falsify the measurement results. Always
use clean cloths, moistened with water only, if necessary.
‡ A new filter insert is required.
‡ Remove the filter housing cover by unlocking the two snap locks on the side.
‡ Remove the filter insert from the filter housing by turning it counterclockwise.
‡ Clean the inside of the filter housing using a cloth and brush. Only use water to moisten
the cloths, since detergent deposits can falsify the measurement result.
â– If it is still uncertain whether the filter insert is to be replaced:
‡ Check the filter insert for deposits (without creating any dust clouds).
‡ If the filter insert is not contaminated significantly, it can be reinstalled instead of a new
filter.
‡ To install the new (or previous, uncontaminated) filter insert, secure it to the spindle in the
filter housing by turning/pressing it in a counterclockwise direction.
‡ Mount the filter housing cover and align it with the filter housing so that the two snap locks
on the side snap into position.
8.3.3 Restarting and checking the purge-air unit
‡ Make sure that any dust escaping from the open end of the purge-air hose when the
purge-air unit is switched on again, e.g., cannot be deposited on the measuring system:
‡ Align the open end of the purge-air hose in such a way that the air flow can escape
unhindered without creating dust clouds in the direction of the measuring system or
measuring probe.
‡ After the measuring probe has been removed from the duct, cover the purge-air inlet
on the probe temporarily to protect it from dust.
‡ Switch on the power supply to the purge-air unit briefly (for approx. 2 min.) to remove any
loose dust. The purge-air hose is not connected to the measuring probe yet. In doing so,
knock the filter housing lightly to remove any dust particles.
‡ While the purge-air unit is switched on, connect the purge-air hose to the purge-air inlet
on the measuring probe or optional differential pressure monitor again. Make sure that
the hose clamp is secure.
‡ With the purge-air unit switched on, check
– whether it generates a uniform air current at the openings of the measuring probe
– whether the fan is operating quietly, without any noticeable vibrations or irregular
noises
‡ Test whether the low-pressure monitor and the connected signal unit are functioning cor-
rectly:
‡ Instruct the control room personnel, where the filter monitor signals are received, to
monitor the signals.
‡ Partly cover the extraction aperture of the air filter briefly using a piece of cardboard or
similar object that cannot enter the filter or cause it to be contaminated.
‡ Check whether the low-pressure monitor responds by signaling that a filter change is
necessary.
To Next Page
Loading...
Need help?
General
