Gossen Mavolux 5032C/B - Manual (Page 5)

GOSSEN Foto- und Lichtmeßtechnik GmbH 5
Combining Special Functions
The hold and MAX functions are mutually incompati-
ble. If one is selected, the other is automatically dis-
abled. 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 instrument off by pressing the
“on/off” key. The instrument is switched off automat-
ically if none of its keys are activated for a period of
approximately 2 minutes.
2.6 Measuring Luminance (accessory required)
Illumination defines the amount of light which strikes
a surface, and luminance is a measure of the
amount of light reflected from a surface.
When the luminance attachment has been screwed
onto the sensor, the measuring instrument is auto-
matically switched to the luminance mode and indi-
cates 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 measur-
ing instruments!).
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 illumination of the sur-
face is to be measured (e.g. workstation lighting).
Please observe the following:
– Artificial sources of light do not reach full power
until after they have been on for a lengthy period
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 mains voltage with a voltmeter. We
recommend the handy METRAVOLT
â
10D from
GOSSEN-METRAWATT GMBH.