Gill Instruments Ltd
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MetPak/MetPak RG and MetPak Pro Base Stations
Page | 95
Issue 1
Doc. No. 1723-PS-0023
October 2018
Filter
8.2.3.
Barometer
The Barometer device is located internally and is not maintainable or replaceable by a user.
However, if required observe the following with regard to the central Hub box screw cap Gore-
Tex
®
filter.
Consideration should be given to checking the Pressure readings against a standard every 12
months. If required contact Gill Instruments for advice on checking the Barometer calibration.
Pressure Sensor Filter Replacement:
There is a small venting filter for the pressure sensor of the Base Station
range located on the 'Hub' box lid which ensures proper conditions are
present in the 'hub' box for pressure measurements without allowing any
moisture or other damaging pollutants into the box. This filter is made
from Gore-Tex
®
material and is designed to last a long time without
replacement, however, Gill do recommend that this filter is replaced
every 24 months to ensure proper operation of the pressure sensor and
to keep the electronics inside the 'hub' box dry.
If you do not replace the filter every 24 months you may start to see
elevated or erroneous readings of the pressure sensor with time and this
behaviour can be corrected by replacement of the Gore-Tex
®
filter unit.
The Gore-Tex
®
filter kit is available from:-
Gill Instruments
Part Number
1723-PK-024.
To replace the filter, unscrew the 4 screws retaining the hub box lid. Remove the existing Gore-
Tex filter and M12 Nut. Fit and secure the new filter with the nut provided. Re-fit the 4 lid screws.
Should you be uncertain as to how often you should be replacing the filters for your application or
if you wish to discuss this in more detail please contact Gill support and we will be able to provide
a recommendation for you.
8.2.4.
Temperature, Humidity and Dewpoint Probe (Rotronic HC2-S3-GI)
Rotronic Temperature and Humidity Filter Replacement
For extreme environments such as maritime installations, chemical
plants or other areas of high pollution or contamination, Gill highly
recommend replacement of the temperature and humidity probe filter
every 6 months to 12 months to ensure proper performance.
Corroded, discoloured or clogged dust filters should be replaced.
If the filter is not replaced it is very likely you will see elevated humidity
levels with time and if this is allowed to develop for a longer period of
time it can lead to permanent damage on the electronics of the
temperature probe due to the very high moisture content and corrosive
effect of the pollutant or salt.
Ferrule
