Gill Instruments Ltd
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MetPak/MetPak RG and MetPak Pro
Page | 84
Issue 1
Doc. No. 1723-PS-0022
October 2018
The Rotronics polycarbonate dust filter screw-on cap is available from:-
Gill Instruments
Part Number
1723-PK-025 (2 filters).
Rotronic
Part Number
NSP-PCW-PE (1 filter).
If you need to replace the dust filter cap, carefully unscrew it and withdraw carefully avoiding
contact with the Temperature and Humidity circuit board. When re-fitting the filter cap, ensure the
circuit board connections are not bent.
Consideration should be given to an annual calibration check of the HygroClip sensor by the
manufacturer.
If you are replacing the whole cartridge, unscrew the metal ferrule and return the probe to Rotronic
for calibration. Refer to the Rotronic Website for more details:
NOTE.
If you return the sensor to a HygroClip supplier for exchange, please request that the
return unit has the dewpoint feature enabled (HCS2-S3-GI).
8.2.5.
Tipping Bucket Precipitation Sensor.
MetPak RG and MetPak Pro (optional).
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.
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.
Unscrew the 3 nylon screws securing the funnel to the case assembly and remove the funnel.
Remove the end cap from the filter tube; remove the gauze filter material carefully.
The external plastic funnel surface should be cleaned with clean water and a sponge; this will
generally remove any green Verdi Gris should this have been allowed to grow.
Chemicals/detergents should not be used if the water is to be collected for later analysis.
Otherwise mild detergents can be used if required.
End
Cap
Gauze