Lightmeter LM10
in the audible range. If no dominant frequency is available in the range between 10 kHz and
400 kHz, the starting frequency 10 kHz is reproduced. The scan process can be repeated by
pressing the
Selection
button. The dominant flicker frequency is displayed, ″
USa
″ appears
on display in this mode.
Manual ultrasonic
A frequency range from 10 kHz to 400 kHz can be run manually at kHz levels. The reproduced
frequency is increased with the
Selection
button, decreased with the
Record
button. The
currently set frequency is displayed, ″
USm
″ appears in this mode.
The audio functions are reproduced via the integrated loudspeaker by default. Optionally, a head-
phone can be connected to the headphone connector; then the loudspeaker becomes inactive.
Using a headphone is recommended in noisy surrounding or in case of deeper frequencies as
reproduction by loudspeaker is limited here.
3.4. Switching of measurement function
Besides the standard measuring probe, various other measuring probes can be operated on Light-
meter LM10 for the range of visible light. For this, the measurement function corresponding to that
probe is selected via
Selection
button.
The function of measuring probes is described in Chapter Measurement (
.
This additional probe must be activated in menu via the function
Setting
→
Probe X
for operation.
Moreover, the peak-value display for standard measuring probes is selected via
S
election
button. The peak values are indicated by the symbol Ê; the peak value can be deleted via the
menu function Peak-Hold or
Record
button.
7
