METER ATMOS 41 - Page 33

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ATMOS 41
Table 5 Troubleshooting the ATMOS 41 (continued)
Problem Possible Solutions
Not reading any rain or not
measuring rain accurately
Remove any debris from rain gauge funnel. The ATMOS41 must be
within approximately ±2 degrees of dead level (0, 0) in both the X and
Y directions to accurately measure rainfall. If not within this range,
drops from the flared hole can miss the gold electrodes entirely. Use
the internal level measurements that are available in the ATMOS41
data stream to confirm that the ATMOS41 is level.
Gently twist the top of the weather station and remove the rain
gauge funnel.
NOTE: BE CAREFUL TO UNPLUG THE PYRANOMETER CONNECTOR INSIDE THE
FUNNEL BEFORE REMOVING THE FUNNEL COMPLETELY.
Check to make sure that there are no obvious problems and that the
gold electrodes are aligned correctly Figure18.
Pyranometer
Figure17 Pyranometer Figure18 Gold electrodes
The accuracy of the rain gauge measurement can be checked using
the procedure described in How to check the drip counter calibration
(metergroup.com/atmos-41-drip-counter-calibration).
Water not flowing
through rain gauge
Check spring, screen, and the outflow to ensure there is no lodged debris.
No wind speed
Check anemometer pathway to make sure there is no debris blocking
the path of the sonic transducer measurement (between transducers
and acoustic mirror on base).
Check the sonic transducers for water build-up; if there is moisture,
take a dry cloth and dab it away.
Check to see that the sintered glass plate (Figure7) is not dirty.
Clean by flushing with water and dry with a dry cloth (Section 4.3).
Be sure the ATMOS41 is level.