Apogee MI-220 Manuale d'uso - Pagina 12

Sfoglia online o scarica il pdf Manuale d'uso per Strumenti di misura Apogee MI-220. Apogee MI-220 16. Mi series infrared temperature meter

MAINTENANCE AND RECALIBRATION

Blocking of the optical path between the target and detector, often due to moisture or debris on the filter, is a common

cause of inaccurate measurements. The filter in the separate sensor of the MI series infrared temperature meters is inset in an

aperture, but can become partially blocked in four ways:

Dew or frost formation on the filter.

Salt deposit accumulation on the filter, due to evaporating irrigation water or sea spray. This leaves a thin white film

on the filter surface. Salt deposits can be removed with a dilute acid (e.g., vinegar). Salt deposits cannot be

removed with solvents such as alcohol or acetone.

Dust and dirt deposition in the aperture and on the filter (usually a larger problem in windy environments). Dust

and dirt are best removed with deionized water, rubbing alcohol, or in extreme cases, acetone.

Spiders/insects and/or nests in the aperture leading to the filter. If spiders/insects are a problem, repellent should

be applied around the aperture entrance (not on the filter).

Clean inner threads of the aperture and the filter with a cotton swab dipped in the appropriate solvent. Never use an

abrasive material on the filter. Use only gentle pressure when cleaning the filter with a cotton swab, to avoid scratching

the outer surface. The solvent should be allowed to do the cleaning, not mechanical force.

It is recommended that infrared radiometers be recalibrated every two years. See the Apogee webpage for details regarding

return of sensors for recalibration (http://www.apogeeinstruments.com/tech-support-recalibration-repairs/).