Lightmeter LM10
All the functions of various buttons are illustrated in the following table. The buttons saved in light-
grey colour are available only in Lightmeter LM10L/LS.
Button:
Sound
Audio
Selection
Record
pressed briefly
sound off
off
illumination
intensity E
start recording
sound
illumination
intensity
audible range
infrarot IR
end recording
sound
flicker rate
ultraviolet UV
store single-spot
colour
temperature Tf
Peak-Hold
→
Peak-Hold delete
ultrasonic
→
automatic
start scan
ultrasonic
→
manually
increase
frequency
decrease frequency
pressed for 2s
on/off
USB-mode
Menu-mode
leave single-spot
in menu
Esc
back
next
selection/enter
Table 1: Button functions of Lightmeter LM10
3.2. Acoustic display
The acoustic display is controlled via the
On/Sound
button. The sound signal proportional to
measured values can be allocated to illumination intensity or flicker rate or deactivated. The func-
tion is displayed by the symbol
.
3.3. Audio functions
The Lightmeter LM10 has three audio functions to show the flickering of lamps acoustically. The
various audio modes can be selected by pressing the
Audio
button.
Scan mode
Shows the flicker rate in % and the dominant flicker frequency in kHz. The acoustic reproduc-
tion is inactive. This mode is shown by ″
Sca
″ on display. If the illumination intensity is less than
50 lx or greater than 20 klx, a question mark is displayed in flicker frequency and flicker rate as
no distinct specification of values is possible in such conditions. A flicker rate of at least 5% is
necessary for displaying frequency.
Audible range
With this, the flickering is reproduced in the frequency range from 50 Hz to 16 kHz directly via
the loudspeaker. Flicker rate is displayed in % and the dominant flickering frequency in kHz in
scan mode. This mode is signaled with ″
S
″.
Automatic ultrasonic
This mode transfers the flickering in frequency range from 10 kHz to 400 kHz in audible
frequency range. The LM10 thus scans the dominant flicker frequency and transfers it optimally
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