5.19 QOL111 Maintenance
QOL111 can operate maintenance-free for a long time. Vaisala recommends that you visually
inspect the obstruction light once a year to make sure correct operation. Clean it using a
soft, lint-free cloth moistened with mild detergent.
5.20 Calibration Services
Vaisala oers calibration services for the following sensors in the preconfigured sensor set:
• Relative humidity and temperature sensors
• Pressure sensors
• Wind sensors
• Solar radiation sensors
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