Operator`s manual

27
Manual
Sensors
Figure 9: Q-7¬.1-L REBS Radiometer
The operation of the Net Radiometer is fully automatic and no user actions are required. The appropriate
instructions to this end are included in the BUOY_METSTAT datalogger program.
3.2.3 Maintenance
The following maintenance is required:
During every visit to the Met Station, inspect the silica gel to ensure it is still blue and white. If the color •
changes to pink and white, replace it with dry silica gel. Wet silica gel can be dried by removing it from the
desiccant tube and baking at 130 C until it returns to a blue and white color. The desiccant tube is located in the
support arm and is accessible by removing the end plug and vinal cap. Remove the desiccant tube and replace
the silica gel. If the level of the Radiometer is perfectly horizontal (the air bell of the spirit level should be in
the middle of the circle on the glass), correct if necessary with the adjustment screws. The primary objective
of the desiccant is to prevent condensation inside the polyethylene windshields.
If internal condensation develops inside the dome, replace the desiccant with a dry one. Also check that the •
windshields and O-rings are in good condition and are properly seated against the radiometer frame. If there
is still no obvious reason for the internal condensation, check for possible leaks in the sensor as follows:
remove the desiccant tube.1.
immerse the Radiometer in water and blow gently into the open end of support arm. A stream 2.
of bubbles will indicate the location of any leaks.3.
dry the instrument with a soft facial tissue.4.
Note: Remember to replace the support arm vinal cap. Orient the vinal cap so that the holes point towards the
ground.
Remove any dust or debris from the windshields by washing with a camel hairbrush or with a paper tissue •
Support Arm Level Bubble
Thermopile Sensor (inside)