Apogee Instruments S2-141 Kullanıcı El Kitabı - Sayfa 16

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MAINTENANCE AND RECALIBRATION

Blocking of the optical path between the target and detector can cause low readings. Occasionally, accumulated

materials on the diffuser can block the optical path in three common ways:

1. Moisture or debris on the diffuser.

2. Dust during periods of low rainfall.

3. Salt deposit accumulation from evaporation of sea spray or sprinkler irrigation water.

Apogee Instruments PAR-FAR sensors 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 PAR-FAR sensors be recalibrated every two years. See the Apogee webpage for details

regarding return of sensors for recalibration

repairs/).

(http://www.apogeeinstruments.com/tech-support-recalibration-