Operating Instructions
MAVOLUX 5032C
Digital Luxmeter
3-349-038-15
1/5.99
CALCULATOR
Sensor
Display
Light Detector
Keypad
MAVOLUX 5032C
2 GOSSEN-METRAWATT GMBH
Luminance Attachment
Table of Contents Page
1 Applications ..............................................................3
2 Operation .................................................................. 4
2.1 Battery Test ................................................................ 4
2.2 Taking Measurements ................................................. 4
2.3 Special Functions ........................................................4
2.4 Overload Display ......................................................... 5
2.5 Switching the Measuring Instrument Off ....................... 5
2.6 Measuring Luminance (accessory required) .................. 5
2.7 Tips for Taking Correct Measurements ......................... 5
2.8 Ever-Ready Case ........................................................6
3 Accessories .............................................................. 6
4 Technical Data .......................................................... 7
5 Maintenance and Calibration ....................................8
6 Illumination Regulations ........................................... 9
7 For Lighting and Illumination Technicians ..............10
8 Fundamental Light Theory ...................................... 12
9V(λ) Matching ........................................................ 12
10 Product Support ..................................................... 13
11 Repair, Replacement Parts and
1 Applications
The MAVOLUX 5032C luxmeter and Footcandle
meter is a handy, easy to use and h ig h ly accurate
measuring instrument. It allows for the measurement of illumination in either lux or footcandles as
well as luminance in cd per square meter with
optional luminance attachments which can be
screwed onto the sensor, and are available as
accessories.
The instrument is equ i pped with color correction ,
i.e. its spectral response has been matched to that
of the human eye, V(λ), in accordance with
DIN 5032, part 7, class C.
The correction filter is integr a te d in to the sensor. All
important light characteristics can thus be accu rately measured without taking correction factors
into consideratio n.
Integrated cosine correction is included as well in
order to assure that oblique, inciden t light is also
evaluated correctly.
Even very intense light (e.g. dayl ight or headlights)
can be measured without additional accessories.
Calibration Service .................................................13
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2Operation
First instal l th e inc lu d e d bat t er y (one 1.5 V mignon,
alkaline-manganese cell per IEC LR6) into the battery holder. Open the snap-fastener at the battery
compartment at the back pan el o f t he m e as u r in g
instrument. Be certai n that the battery is correctly
poled when inserted according to the poling indication in the battery compartment.
2.1 Battery Test
Battery testin g is pe rfor med auto matica lly. If the
symbol appears at the display, the battery must be
replaced.
2.2 Taking Measurements
Switch the measuring instrument on by pr essing the
“on/off” key.
After the instrument has been switched on, automatic measuring range selection is always active.
The currently selected measuring range can be
locked by briefly pressing the „Auto
key (range hold). Browsing up or down
„Range“
through additional measuring ranges is accomplished by briefly pressing the scroll keys in a
repeated fashion. If both the „Auto
keys are pressed and held simultaneo u s l y,
„Range“
the instrument is re turned f r om manua l to aut omat ic
measuring r an g e se le ct io n .
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↕“ or the
↕“ and the
2.3 Special Functions
After the MAVOLUX 5032C has been switched on,
the “auto-mode” is al ways a ctive , i.e . th e measu r ing
range with the best resolution is selected automatically, and the display is refreshed at a frequency
which is equal to the measuring rate of the A-D
converter (appro x . 2.5 measurements per se co nd).
Hold Key
When the hold key is activated, the current measurement value is frozen at the display.
“ ”
The hold functio n is ca ncelled if the key is act iv at e d
a second time.
MAX Key
Maximum illumination or lum in anc e ca n be det e rmined by activating the MAX function, after which
the highest det ected value is st o red t o memory.
The MAX function is cancelled if the key is activated
a second time.
lx/fc Key
The “lx/fc” is used to select the desired unit of
measure, eith er lux or fo ot can dles. Whe n one of the
luminance attachments is scr ewed to the sensor
(see chapter 3, page 6), the i nstr ument will automa tically switch over to reading the corresponding units
2
of cd/m
.
Combining Special Functions
The hold and MAX functions ar e mutua lly in co mpat ible. If one is selected, the other is automatically disabled. If a measurement value has been obtained with
the hold or the MAX function, it cannot be converted
into the other unit of measure by activating the “lx/fc”
key . The hold or MAX function is exited in such cases.
2.4 Overload Display
If a measuring range is exceeded, “OL.” (overload)
appears at the display.
2.5 Switching the Measuring Instrument Off
Switch the measuring in strum ent off by pres sing the
“on/off” key. The instrument is switched off automatically if none of its keys are activated for a period of
approximately 2 minutes.
2.7 Tips for Taking Correct Measurements
Make sure that the illuminated surface is lit up in a
complete and uniform fashion (e.g. no shadows
cast by hand or body). Hold the sensor parallel to
the surface to be evaluated, if illu mination of the surface is to be measured (e.g. workstation lig hting).
Please observe the following:
– Artificial sources of light do not reach full power
until after they have be en on fo r a lengthy peri od
of time, and should therefore be switched on
15 minutes before measurements are taken.
– Mains voltage influences the intensity of light
generated by artificial light sources.
Check the main s vo lt a g e w i th a v o lt meter. We
recommend the handy METRAVOLT
10D from
GOSSEN-METRAWATT GMBH.
2.6 Measuring Luminance (accessory required)
Illumination defines the am ount of li ght whi ch stri kes
a surface, and lumi nance is a measure of the
amount of light refle cted from a surface.
When the luminance attachment has been screwed
onto the sensor, the measuring instrument is automatically switched to the luminance mode and indicates the measurement value with the correct
numeric value at the display (you do not have to
convert the value as is the case with older measuring instruments!).
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2.8 Ever-Ready Case
A leather ever-ready case for the luxmeter and a
leather quill for the sensor are included as standard
equipment. A clip is pro v ided at the rear for attaching the instr ument to a belt .
A window in the ever-ready case, as well as an
opening for the sensor in the quill, allow for outdoor
use even und er in clement weat her conditions .
The leather quills for the sensor and the luminance
attachment (access o r y ) can be fastened to the everready case with Velcro strips at the right and le ft .
When storing the equipment, please place the sensor in the quill with the measuring aperture turned
away from the opening. So the light sensitive surface will be protected.
3 Accessories
Separately available accessories expand the
applications ran ge of the instrument.
Calculator for the camera man
and the professional photographer
The measuring res ults from any luxmeter can be
selected at this exposu re calculating dis c wi th a
diameter of appr o x imately 110 mm, and the corresponding exposure time / aperture combinations
can be viewed. Values can be read from the calculating disc in the following units of measure: lux (lx)
and footcandles (fc), or candela per square meter
(cd/m²) and footlamberts (fL).
Luminance Attachment
The luminance attachm ent mea sur es reflected light,
i.e. the luminance of a surface, with a measuring
angle of ±10°.
The measuring instrument is informed by a touchsensitive switch as to whether or not the luminance
attachment has been attached and which one.
The luminance measu rement value is indicated at
the display w ith the correct nu m eric value and u nit
of measure (see also chapter 2.6, page 5).
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4 Technical Data
Light Detector silicon photodiode with V(λ) filter per DIN 5032/7, class C
Measured Quantity Measuring Range Resolution
in Lux (lx) in footcandles (fc)
Illumination I0.1 … 199,9 0.01 … 19,99 0.1 0.01
II 1 … 1 999 0.1 … 199,9 1 0.1
III 10 … 19 990 1 … 1 999 10 1
I V 100 … 199 900 10 … 19 990 100 10
in Candela/m² in cd/m²
Luminance
(with luminance attachment for cd/m
I1 … 1 999 1
I I 10 … 19 990 10
2
)
III 100 … 199 900 100
I V 1 000 … 1 999 000 1000
in lx
Resolution
in fc
Error Limits per DIN 5032, part 7, class C
Most Important Error Limits
Characteristics Allowable Error
V(λ) Matching 9% 7.5%
True Cosine Evaluation 6% 2%
Linearity 5% 1.5%
Adjustment Error 2% 1%
Total Error 20% 15%
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Limits per
DIN 5032 Class C
Actual Error,
MAVOLUX5032C
Measuring Rate approx. 2.5 measurements per
second
LCD Field 50 mm x 25 mm
Display 7 segment
Char. Height 13 mm
Digits 3½ places
Overload Display “OL.” is displayed
Power Supply
Battery 1.5 V mignon alkaline-
Technical Data, Accessories
Luminance Attachment (mea s . an g l e ε
1
/10 = 20° )
manganese cell pe r IEC LR 6
Service Life approx. 75 hours continuous
operation, equivalent to
approx. 2500 measurements
Battery Test Automatic display of “ ”
symbol when batt ery voltage
drops to below approx. 1.0 V
Electromagnetic Compatibility (EMC)
Interf. Emission EN 50081-1: 1992
Interf. Immunity EN 50082-1: 1992
Mechanical Design
Housing Plastic
Dimensions Meter: 65 x 120 x 19 mm
(without ever-ready case)
Sensor: 31 x 105 x 30 mm
Weight Meter and sensor:
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 clea nsers, abrasiv e s o r s o lv en t s .
Should the instrument nevertheless not work to your
complete satisfact io n, please send it to our Service
Division who will speed ily carry thorough the ne cessary repairs. The equipment will be calibrated while
using a standard light source of 2856 K corresponding to the PTB Stan dard Specificat io n s .
Recalibration Schedule
We recommend re-calibration every 1 to 3 years
depending upon how the instrument is used. Please
contact our calibration service, who s e address is
included on page 13.
approx. 200 gr. w/o battery
Light Detector Light collector surface
at diffuser: approx. 20mm dia.
Cable from Meter
to Sensor Permanently attached coil cord
Cable Length approx. 1.5 m
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6 Illumination Regulations
The following definitions are included i n part 1 of the
DIN 5035 standard under the heading “Terms and
General Requirements”:
Nominal Illumination
Nominal illumina tion 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 illumin ation value which is assig ned t o
a specific typ e of room o r activity is related to th e
difficulty of the respective visual task. The assumption is made that the n o minal illuminati on va lu e and
its influence on ones ability to see are not impaired
by interfere nce ef fect s such as dire ct glar e, r ef lecte d
glare and loss of contrast, as well as unsuitable
color and color rend it ion.
Illumination at the Workplace
Nominal illumination of at least 200 lx is required for
continuously occupied indoor workstations, unless
another value is required due to operational or
optical, physiological reasons.
In rooms or indoor areas which are continuously
occupied by personn el, nominal illumination of at
least 100 lx is required.
Planning Values and Minimum Values
The nominal illu min ation value shoul d be mu l ti p lie d
by a factor of 1.25 for planning purposes.
The mean, arithmetic i llumination value at the workplace may not have a value of 0.8 times less than
the nominal illumination value, independent of the
aging factor of the lighting system. However, illumination at any given workstation may never have a
value of less than 0.6 times the nominal illumination
value.
The assignment of a sp ecific nominal illumination
value to a visual task is based upon persons with
average sight. A sight de fe ct w h ich has not been
fully corrected with glasses etc., can be partially or
fully compensated for by increasing illumination.
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DIN 5035 Part 2, Illumination with Artificial Light
Under the hea d in g “Recommend ed Values for
Indoor and Outdoor Work Areas”
This standard in cludes an exten s iv e t ab l e w h ic h
classifies types of work ar eas an d acti vitie s, i ll umin ation values, the color of the light, characteristic color
rendition levels an d classificati ons for the limitation
of direct glare. Important notes concerning speci al
requirements for lighting systems are included in an
additional column, for example, under which circumstances additiona l illumination at any singl e
workstation would be recommended, or even
required.
A table with recommended values for outdoor work
areas has also been added since the version issued
in October, 1979. In addition, characteristic color
rendition levels have been updated to correspond to
the classifications set forth in DIN 5035 part 1.
7 For Lighting and Illumination Technicians
The measurement o f illumination is r equired for the
planning, and during the installation of lighting systems for which testing and mon itoring i s r e quir ed by
law, as well as for the definition of illumination values
for hygienic, physiological, psychological or safety
reasons.
Scope of applicability, terminology, responsibility,
requirements and practical guidelines have been set
forth to a great extent in various DIN standards.
Definitions:
General Lighting
Uniform lighting within a room which provides for
roughly equal seeing condi tions at all points within
the room.
Workplace Oriented General Lighting
General lighting with specified relationships between
lamps and specific workstations (see
DIN V ENV 26385 for definition of workplace).
Individual Workstation Illumination
Illumination for a single workstation in addition to
general lighting.
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Applications Examp les f o r t he Mea s ure ment o f Il lumi nat i on
• Planning and inst allati on of lig hting sys tems and
monitoring of same for aging, contaminatio n
and efficiency
• Daylight in indoor rooms (DIN 5034)
• Inspection of safety lighting (minimum illumina-
tion is equal to 1 lx in accordance with German
workplace regu la t io n s )
• Traffic illumina ti o n with street lights f o r tr a ns por-
tation vehicles and systems (DIN 5044)
• Technical evaluation of automotive headlights
(DIN 5037)
• Gymnastics and sports (DIN 18032 part 1)
• Lighting for sports facilities (DIN 67526-1)
• Illumination of construction sites, railway yards,
Illumination with Artificial Light (DIN5035)
This standard applies to the artificial illumination of
indoor rooms, and is generally applicable to the arti-
ficial illumination of outdoor areas which are used for
the same purposes as the cor responding indoor
rooms. In cooperation with all interested parties, the
standards committee has made an effort to estab-
lish minimum illumination requirements wh ic h are,
on the one hand, technically f easib le, and which , on
the other hand, do not represent any unreasonable
requirements for the user. In combination with
ASR 7/3, the standard repre s ents an accepted and
binding technica l s pecification, by means of whose
application the r equirements set forth in ArbStättV O,
paragraph 7, section 3 dated March 1975, are ful-
filled.
airport aprons and other outdoor areas
• Illumination of buildings, towers and smoke-
stacks
• Illumination of greenhouses and plants
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8 Fundamental Light Theory
The illumination value indicates how intensel y a su rface is illumina t ed. T he unit o f m ea sure used for illumination is lux (abbreviated lx). The lux is defined as
follows: a light source with a luminous intensity of
1 candela (abbreviated cd) generates an illumination
value of 1 lux from a distance of 1 meter. Candela is
equal to the light intensity which is radiated in a ce rtain direction by a source, emitting a monochromatic radi at i o n at a frequency of 540 x 1 0
12
cps
mean value which w as de termined based upo n
tests cond ucted with a la r g e n umber of perso ns.
The integrated silicon photodiode has been so well
matched to the spectral response of the human eye
through the use of filt ers, that it has achieved a
rating of accuracy class C in accordance with
DIN 5032, part 7.
Additional details can be found in the DIN 5032
standard.
and whose radiation power in that direction is
1/683 Watt by sterodiant.
Another illumination unit of measure which is most
9V(λ) Matching
commonly used in England and the USA is the footcandle. One foot candl e is equal t o the i llumin ation of
a light source with a luminous intensity of 1 candela
at a distance of 1 foot.
Footcandles and lux can be converted as follows:
1 footcandle = 10.76 lux
1 lux = 0.0929 footcandles
Light must be evaluated based upon the sensitivity
of the human eye in accordance with the internationally accepted definition for the spectral
response, V(λ), of the human eye whi ch is ad justed
to bright light. This response curve represents the
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10 Product Support
If required please contact:
GOSSEN-METRAWATT GMBH
Product Support Hotline
Telephone +49 911 86 02 - 112
Telefax +49 911 86 02 - 709
11 Repair, Replacement Parts and
Calibration Service
If required please contact:
GOSSEN Foto- und Lichtmeßtechnik GmbH
Lina-Amm o n-Strasse 2 2
90471 Nuremberg, Germany
Phone +49 911 86 02 - 172
Fax +49 911 86 02 - 142
e-mail info@gossen-photo.de
GOSSEN-METRAWATT GMBH 13
14 GOSSEN-METRAWATT GMBH
GOSSEN-METRAWATT GMBH 15
Printed in Germany • Subject to change without notice
GOSSEN-M ETRAWATT GMBH
Thomas-Mann-Str. 16-20
D–90471 Nürnber g
Telefon+49 911 8602-0
Telefax +49 911 8602-669
e-mail: info@gmc-instruments.com
http://www.gmc-instruments.com
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