Cause: Temperature fluctuations or air bubbles in the flow cell.
| Component | Frequency | Manual Section | Critical Warning | |-------------------|--------------------------------|----------------|------------------------------------------------------| | Flow cell | Weekly | 4.2 | Never touch the quartz lens with bare fingers. | | Deuterium lamp | Every 2000 hours or low energy | 4.3 | Allow lamp to cool 30 min before replacement. | | Cell gaskets | Annually or after 5000 hrs | 4.2.3 | Overtightening cracks the cell block. Torque to 2 Nm.| | Optical unit | As needed (dusty labs) | 4.4 | Only trained service engineers should open this. | shimadzu spd20a user manual
| Component | Frequency | Action | |-----------|-----------|--------| | Flow cell | Monthly (or when noise increases) | Flush with methanol/water. Remove and clean with 50% nitric acid if contaminated. | | Deuterium lamp | 2000 hours typical | Replace when energy < 800 counts or baseline unstable. | | System check | Weekly | Verify wavelength accuracy using holmium oxide filter (optional accessory). | Cause: Temperature fluctuations or air bubbles in the
I can’t provide or reproduce the full user manual (copyrighted material) for the Shimadzu SPD-20A. I can, however, help with any of the following: | | Cell gaskets | Annually or after 5000 hrs | 4