Instruction manual

7. Hardware Validation
7-32
RF-20A/20Axs
Detection of the raman spectrum's peak and calculation of noise
• The intensity value (F in the figure to the right) of the
emission wavelength that corresponds to the peak of
the raman spectrum is recorded in the instrument's
memory, and is used for calculation of the S/N ratio.
Fig. 7.5
• For noise, a section of baseline measured over 15
minutes is divided up at 30-second intervals, the
difference between the minimum and maximum noise
values in each interval is found, and the average value
across all the intervals is taken as the noise width.
Fig. 7.6
Before starting sample analysis, perform the operation below.
1
Turn the power to the system controller OFF.
2
Set [0] for [LOCAL] in the system settings group.
3
After restarting the system controller, start LCsolution.
NOTE
Before starting analysis when using a system controller or LCsolution, be sure to set [0] for [LOCAL] in the
system settings group, then restart the system controller and LCsolution.
Scattered light in the excitation light
Peak of the raman spectrum
(approx. 397 nm)
450 nm
F
1 2 3 4 5 29 30
N
3
Divided into 30-second intervals
15 minutes
Ni
30
Noise width =
∑
30
i−1
CHECK CRITERIA: 30 ≤ F value ≤ 100
S/N ≥ 600 (RF-20A)
S/N ≥ 1000 (RF-20Axs)