Contents
MetPak RG User Manual
©
Gill Instruments Ltd
Last Change
Page 52
12 February, 2013
5.4
Barometer (on Hub PCB)
The Barometer device is maintenance-free, however, if required observe the
following with regard to the central Hub box screw cap Gore-Tex
®
filter.
Pressure Sensor Filter Replacement:
There is a small venting filter for the pressure sensor of the MetPak located on the
'Hub' box lid which ensures proper conditions are present in the MetPak '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.
5.5
Rain Gauge
Maintenance periods are site dependant but periodic maintenance every 2-3
months should be considered.
To ensure reliable and accurate measurements, we recommend that the following
checks are carried out at each visit to the rain gauge.
Please note that if the gauge is still connected to a data logger, and logger is
operating care must be taken to avoid tipping the bucket when carrying out the
following operations.
1. Inspect the funnel and filter for any damage or blockage. At certain times of the
year leaves may have accumulated in the funnel, dirt and dust can also block the
filter preventing or reducing the flow rate to a slow drip to the buckets beneath. The
leaves can easily be removed from the funnel.
2. Unscrew the 3 nylon screws securing the funnel to the case assembly and remove
the funnel.
3. Remove the end cap from the filter tube; remove the gauze filter material carefully.
End Cap
Gauze
