The manual is dense. Focus on these pages for real improvement:
| Symptom | Most likely cause | Fix | |---------|------------------|-----| | | Air bubbles in cell | Purge cell at 3 mL/min with degassed mobile phase. | | Spikes (random, sharp) | Dust or crystals in flow cell | Clean cell as above. | | Gradual baseline drift | Detector not warm | Wait 60 min. Check lab temp stability. | | No signal at all | Lamp off or failed | Check lamp icon on display. Go to [FUNC] → [1] LAMP . | | High pressure in cell only | Clogged outlet tube | Disconnect outlet; if pressure drops, replace outlet capillary. | | Wavelength inaccurate | Lamp aging or misalignment | Run WAVE CHECK (use holmium oxide filter, optional). | shimadzu spd20a user manual better
Спектрофотометрические детекторы SPD-20A, SPD-20AV | Аналит The manual is dense
Shimadzu SPD-20A Service Manual | PDF | Optical Filter | Light | | Gradual baseline drift | Detector not warm | Wait 60 min