Gossen Mavospot - Manual (Page 2)

GOSSEN Foto- und Lichtmesstechnik GmbH
2
1 Applications
The MAVO-SPOT attached to the measuring instrument MAVO-MONITOR provides high precision measurements
with a measuring angle of 1 degree.
The combined set permits measuring the luminance, non- contact, at distances from 1 m to
∞
.The MAVO-SPOT is
equipped with SLR (single lens reflex) optics having a viewing area of 15° and a clearly defined 1 degree measuring
circle in the centre.
Two close-up lenses available as optional accessories permit reducing the measuring distance down to 34 cm. The light
sensor is color corrected, i.e. its spectral responsitivity is matched to the spectral photopic vision of the human eye (V
λ
),
acc. to DIN 5032, Part 7, Class B.
The combined set is especially suited for measuring:
•
Monitors, while taking into account the ambient light, e.g. inspection and constancy tests at medical imaging
systems, acc. to DIN 6868-57 and IEC 61223-2-5
(QS-RL dt. Nov. 20, 2003)
•
Lighting of streets, tunnels, airports
•
Lighting of sports areas
•
Light contrast at work stations ( Protection Laws and Regulations)
•
Lighting in museums
•
Projection screens (Checking the uniformity of illumination)
2 The Functioning of the MAVO-SPOT
2.1 Inserting the Battery
The battery compartment is located at the front of the grip of the unit.
Slide the cover of the compartment downward, insert the battery and attach the connector clip to the new battery. Then
insert battery in the compartment.
Attention: Only use new batteries or rechargeable accus according to IEC 6 LF 22.
2.2 Battery Control
When the instrument is switched on the green LED on the right of the ON/OFF switch
lights up. When the battery is exhausted the red LED at the left of the ON/OFF switch
will light up. You should then replace the battery immediately.
A new alkaline-manganese battery will last for approx. 60 hours of
continuous measurement operation.
3 Using the MAVO-SPOT
3.1 Prepairing the measurement
Screw the protective filter, supplied with the instrument, or one of the close-up lenses on the lens of the MAVO-SPOT.
For For getting correct measurement values, either protective filter or one of the close-up lenses must be placed on the
lens, but please note: one item only – either the filter or one of the lenses. Pull the stray light shield out. Use the attached
cable to connect the MAVO-SPOT with the MAVO-MONITOR. Switch both units on and select a suitable measuring
range.
3.2 Measuring
View through the eye-piece of the SLR viewfinder of the MAVO-SPOTand direct the measuring circle, you see in the
viewfinder to the area to be measured. This area should be illuminated uniformly and be as large as possible as
compared to the measuring circle. Press the key HOLD (Display Hold) at
The MAVO-MONITOR and read the value measured.
4 Accessories
4.1 Standard equipment
•
Battery
•
Instruction Manual
•
Protective filter