Gossen Mavolux 5032C/B - Manual (Page 10)

10 GOSSEN Foto- und Lichtmeßtechnik GmbH
5 Maintenance and Calibration
No special maintenance is required if the instrument
is handled correctly. Keep outside surfaces clean.
Use a slightly dampened cloth for cleaning. Avoid
the use of cleansers, abrasives or solvents.
Should the instrument nevertheless not work to your
complete satisfaction, please send it to our Service
Division who will speedily carry thorough the neces-
sary repairs. The equipment will be calibrated while
using a standard light source of 2856 K correspond-
ing to the PTB Standard Specifications.
Recalibration Schedule
We recommend re-calibration every 1 to 3 years
depending upon how the instrument is used. Please
contact our calibration service, whose address is
included on page 15.
6 Illumination Regulations
The following definitions are included in part 1 of the
DIN 5035 standard under the heading “Terms and
General Requirements”:
Nominal Illumination
Nominal illumination values for indoor areas include
20/50/100/200/300/500/750/1000/1500 and
2000 lx.
The nominal illumination value is related to the mean
aging factor of the lighting system in question.
The nominal illumination value which is assigned to
a specific type of room or activity is related to the
difficulty of the respective visual task. The assump-
tion is made that the nominal illumination value and
its influence on ones ability to see are not impaired
by interference effects such as direct glare, reflected
glare and loss of contrast, as well as unsuitable
color and color rendition.
The assignment of a specific nominal illumination
value to a visual task is based upon persons with
average sight. A sight defect which has not been
fully corrected with glasses etc., can be partially or
fully compensated for by increasing illumination.