The photodiode array measures the absorbance of the sample at multiple wavelengths, providing a spectrum of the analyte. The detector then calculates the absorbance value based on the difference between the sample and reference beams.
Request help or baseline symptom you are currently experiencing on your unit. shimadzu spd20a user manual
The SPD-20A is designed for high-sensitivity detection in the UV range, while the SPD-20AV expands this capability into the visible spectrum. The photodiode array measures the absorbance of the
: A standard feature that minimizes baseline drift caused by ambient temperature changes, significantly increasing analysis reliability Dual-Wavelength Mode The SPD-20A is designed for high-sensitivity detection in
Users can perform a "System Check" to verify lamp energy and wavelength accuracy. A "Complete" check level evaluates both the light source and internal calibration. 3. Maintenance and Safety
: Switch on the main power at the bottom left of the unit.