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4. SERVICE
This section contains contact information, calibration frequencies, and troubleshooting guidelines.
4.1 CALIBRATION
lists the recommended sensor calibration frequencies.
Table 3 Calibration Frequencies
Sensor Function
Calibration Frequency
Solar Radiation
Every 2 years
a
Rain Gauge
Not needed
Lightning
Not needed
Wind
Not needed
Barometric Pressure
Every 1–2 years
b
Relative Humidity (RH)
Every 1–2 years
b
Compass
Not Needed
a
Contact Apogee Instruments for details on sending the pyranometer in for calibration:
+1.877.727.6433.
b
METER offers a service to calibrate barometric pressure and RH sensors (contact METER Support at
for more information).
4.2 CLEANING AND MAINTENANCE
1. Check the following areas to make sure they are clear of miscellaneous environmental,
animal (specifically bird droppings), or insect debris:
a. Rain funnel
b. Solar radiation sensor
c. Anemometer opening
Do not remove the sensor from its mount to remove debris.
Be sure the sensor is still level after cleaning.
d. Sintered glass reflection plate
2. Clean the ATMOS 41
a. Scrub with light to medium pressure using a warm, damp cloth.
b. Completely dry the sensor by removing excess water using a dry cloth.
