Apogee Instruments S2-431 Owner's Manual - Page 15

Browse online or download pdf Owner's Manual for Accessories Apogee Instruments S2-431. Apogee Instruments S2-431 18 pages. Red - far-red sensors

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Apogee Instruments S2-431 Owner's Manual

MAINTENANCE AND RECALIBRATION

Dust or organic deposits are best removed using water or window cleaner and a soft cloth or cotton swab. Salt
deposits should be dissolved with vinegar and removed with a soft cloth or cotton swab.
Blocking of the optical path between the target and detector can cause low readings. Occasionally, accumulated
materials on the diffuser of the upward-looking radiometer and in the apertures of the downward-looking
radiometer can block the optical path in three common ways:
1. Moisture or debris on the diffuser (upward-looking) or in the apertures (downward-looking).
2. Dust during periods of low rainfall.
3. Salt deposit accumulation from evaporation of sea spray or sprinkler irrigation water.
Apogee Instruments Red - Far-red have a domed diffuser and housing for improved self-cleaning from rainfall but
active cleaning may be necessary. Dust or organic deposits are best removed using water, or window cleaner, and
a soft cloth or cotton swab. Salt deposits should be dissolved with vinegar and removed with a cloth or cotton
swab. Salt deposits cannot be removed with solvents such as alcohol or acetone. Use only gentle pressure when
cleaning the diffuser with a cotton swab or soft cloth, to avoid scratching the outer surface. The solvent should be
allowed to do the cleaning, not mechanical force. Never use an abrasive material or cleaner on the diffuser.
It is recommended that two-band radiometers be recalibrated every two years. See the Apogee webpage for
details regarding return of sensors for recalibration
recalibration-repairs/).
(http://www.apogeeinstruments.com/tech-support-