Hitachi F-4700 - Stability

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3.2.4 Stability
Determine the variation with time of emission intensity (including scattered light) under fixed measurement
conditions. Conduct the measurement simultaneously with that in 3.2.3. The results will be indicated as
in Fig. 3-13.
 Auto parameter setting (fixed)
Time scan mode
 EX and EM Slits : Both 10 nm
 EX WL : 350 nm
 EM WL : Raman peak wavelength
 Response : 4 s
 Scan time : 600 s
 PMT Voltage : 700 V
 Calculation method
As in Fig. 3-14, divide all of the data into 10-second intervals, and obtain the average for all of the
intervals. Calculate the amount of drift by way of the following equation.
Stability (drift)=  100
Specification: within 1.5%/10 min
(max. average value) - (min. average value)
(max. average value)