METROTEC GSM, Руководство по эксплуатации, Страница: 12 / 33

METROTEC
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5.4.4 Location of condensate collectors
When fitting a condensate collection vessel, especially one for water, it should be ensured that
it is located at the lowest point in the entire piping system..
It should be borne in mind that the filling of empty space in condensate collectors and filters
will result in some delay in effecting measurements
5.4.5 Filter system arrangement:
The provisions made for the pretreatment of gases to be measured need to be adapted to the
task concerned.
A standard system generally includes:
1. An initial water separator which may be equipped to empty itself of any condensate it
2. may collect.
3. A coarse filter for the filtration of particles with a grain size exceeding 50
m
.
4. (Only necessary where a great deal of dust is involved)
5. A fine filter for the filtration of particles with a grain size exceeding 25
m
.
6. It is advantageous for this filter to be equipped to close off the gas flow immediately
in the event of any liquid being applied to it's filter element.
5.5 Switching off the measurement unit
It is preferable for the unit to be kept in continuous operation. As the sensor then remains
heated there is less risk of it suffering the presence of condensation. that could lead to corro-
sion but if it is required to put the unit out of operation, the power plug should be withdrawn
and attention be paid to the following points:
Heated sensors:
Inline sensors:
Remove carefully while still hot and allow to cool, taking care to avoid mechanical or thermal
stress!
Compact sensors:
Flush with air before switching off
Unheated sensors:
These are generally left in place
Putting the measurement unit briefly out of operation:
When the unit is switched on again after being switched off for a short time, the instructions
given above under "Switching the unit on" should be followed.