Lightmeter LM10
6.7. Measurement of the colour temperature with the measuring probe TF10
For this, the measuring probe TF (Article no. 266) must be used
and the Tf unit for the colour temperature must be selected
using the selection button.
For this, the function
Settings
→
Measuring Probe TF10
must be
activated.
The unit for the colour temperature is K (Kelvin). The measure-
ment range is from 2000 K to 3500 K.
The display of the flicker rate, the flicker frequency and the
audio functions are not available.
6.8. Signal analysis at the voltage output
The Lightmeter LM10S/LS has a voltage output for signal analysis (
→
8.5).
The entire measurement signal (AC and DC) is at connection no. 1 and only the AC signal is at
connection no. 2. The AC voltage signal has auto range and is boosted by the factor ten under
1000 lx.
The brightness of a lamp can be made visible on the entire signal with an oscilloscope. The
frequency spectrum of the flicker frequencies are seen with a frequency analyser.
Frequency range of a compact fluorescent lamp
17
