Gossen Mavomonitor - Manual (Page 13)

GOSSEN Foto- und Lichtmeßtechnik 13
Close-up Lenses
The MAVO-SPOT with the included protective filter
attached to the lens permits measuring from a dis-
tance of 1 m to
∞
.
For shorter distances two different close-up lenses
are available as optional accessories. The close-
up lens 1 reduces the measuring distance to
approx. 51 cm to 1 m. Lens no. 2 permits reducing
the measuring distance to approx. 34 to 51 cm.
Please note that one of the close-up lenses or
the protective filter must be mounted to the
lens.
Ever-ready Case and Transport Case
An ever-ready case is included with the MAVO-
SPOT where also the protective filter and one
close-up lens can be placed.
As an optional accessory a sturdy transport and
storage case for the combined set comprising both
the MAVO-SPOT and the MAVO-MONITOR and
also for two close-up lenses and two spare batter-
ies is available.
11 Maintenance
11.1 Calibration Service
The instruments are calibrated at the light of
a scientific standard lamp having a colour
temperature of 2856 K, fully in accordance with
the PTB standard.
Depending on how the instrument is being used
we recommend a recalibration interval between
12 and 18 months.
For this purpose please contact our
Calibration Service Department
(telephone +49 911 8602 172).
11.2 Cleaning and Maintenance
Keep the instrument dry and clean, away from
dust and with the protective cover placed on the
lens.
Please use a slightly damp cloth only for cleaning
the plastic surfaces; avoid the use of cleaning
agents or other strong chemicals. The lenses
should be cleaned either with a special cloth or
brushes as used for optics.