Gently pull the plastic lamp power connector out of its socket.
Comprehensive Guide to the Shimadzu SPD-20A User Manual: Operation, Maintenance, and Optimization
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Connect the fiber optic or digital link cable (CBM link) from the detector's rear panel to the Shimadzu system controller (e.g., CBM-20A) or directly to the PC if using an specialized interface card. Flow Cell Piping:
Allow the lamp to warm up for to stabilize the baseline. Step 2: Setting Parameters Gently pull the plastic lamp power connector out
What specific (if any) is displaying on the screen?
For detailed troubleshooting or to download the official PDF, search the for the "SPD-20A Instruction Manual." Flow Cell Piping: Allow the lamp to warm
Disclaimer: This article is a summary based on common knowledge and provided search results. Always consult the specific, official Shimadzu manual provided with your instrument for the most accurate information.
The unit uses advanced, high-stability mirrors and filters designed for longevity, which the manual describes for proper calibration. 3. Operation and Method Development
| Symptom | Probable Cause | Corrective Action | |---------|----------------|--------------------| | High baseline noise | Air bubbles in cell | Flush with degassed mobile phase or remove cell and rinse. | | Negative peaks | Sample absorbs less than mobile phase at set wavelength | Change wavelength or check mobile phase UV cutoff. | | Lamp fails to ignite | Lamp expired or power supply issue | Check lamp hours; replace D2 lamp. | | No signal at high sensitivity | Flow cell window dirty | Clean cell with 1M HNO₃, then water, then methanol. | | Wavelength error | Stepper motor failure or filter stuck | Run Wavelength Calibration from service menu (qualified personnel only). |
Ensure instrument is away from drafts. Flush the flow cell with 0.1M Nitric Acid, followed by copious amounts of water. Contaminated flow cell or column bleed.