The Shimadzu SPD-20A Go to product viewer dialog for this item.
is a high-performance UV-Vis detector designed for the Prominence HPLC series. It is widely recognized for its high sensitivity and low noise levels, making it a staple in analytical laboratories. Core Specifications & Features Wavelength Range: Covers
, allowing for the detection of a wide variety of compounds.
Dual-Wavelength Mode: Capable of monitoring two different wavelengths simultaneously, which is essential for identifying peaks and ensuring purity. Sensitivity: Features a noise level of and a drift of , ensuring reliable data even at low concentrations.
Temperature-Controlled Cell: Includes a standard thermostatic flow cell to minimize the impact of ambient temperature fluctuations on the baseline. Operational Guidelines
Based on standard Shimadzu Prominence manuals, the following steps are critical for safe and effective use: System Initialization: Ensure the waste line is properly secured.
Perform a "Lamp ON" command via the front panel or LabSolutions software. Allow at least 30 minutes for the Deuterium ( D2cap D sub 2 ) lamp to stabilize. Purging and Priming:
Flush the flow cell with a mobile phase that is transparent at your target wavelength.
Use the "Zero" or "Autozero" function once the baseline has stabilized to set the current absorbance to Wavelength Calibration:
The unit performs a self-diagnostic check upon startup, using the emission lines of the D2cap D sub 2 lamp to calibrate the monochromator automatically. Maintenance and Troubleshooting Lamp Replacement: The D2cap D sub 2
lamp typically has a lifespan of approximately 2,000 hours. If the "Energy" levels drop significantly or the baseline becomes excessively noisy, the lamp likely needs replacement.
Flow Cell Cleaning: If you notice high backpressure or ghost peaks, the flow cell may be contaminated. Flush with a compatible strong solvent (like Isopropanol) or a dilute nitric acid solution (refer to the specific manual for concentrations).
Leak Management: Always check the leak sensor at the bottom of the unit. If a leak is detected, the system will automatically stop the pump to prevent damage. Safety Precautions
UV Exposure: Never look directly into the lamp or the end of the fiber optic cable while the lamp is on, as UV radiation can cause permanent eye damage. shimadzu spd20a user manual
Solvent Compatibility: Ensure all buffers and solvents are filtered ( or finer) to prevent clogging the delicate flow cell. D2cap D sub 2
lamp or how to configure dual-wavelength settings in LabSolutions?
Shimadzu SPD-20A UV-Vis detector Go to product viewer dialog for this item.
is more than just a standard benchtop tool; it’s a high-sensitivity workhorse designed for the Prominence HPLC series. While the user manual covers basic operations, its most "interesting" capabilities lie in how it handles light and temperature to achieve extreme precision. Hidden "Superpowers" of the Go to product viewer dialog for this item.
Simultaneous Multi-Wavelength Detection: You don't have to choose just one wavelength. The
can monitor two different wavelengths simultaneously. This is ideal for qualitative purity checks using ratio chromatograms, where you compare the signals to see if a peak is truly a single compound or two overlapping ones.
The "Eco-Product Plus" Edge: This detector is certified as a Shimadzu Eco-Product, meaning it uses 35% less power than previous models without sacrificing its world-class noise level (0.5 x 10⁻⁵ AU). SR-Cell (Sensitivity and Resolution):
It features a specialized "SR-Cell" that significantly reduces peak dispersion, which is what allows it to transition smoothly between standard HPLC and high-speed UHPLC applications.
Thermal Control: Most detectors are at the mercy of room temperature. The
includes a temperature-controlled flow cell as standard, which eliminates baseline drift caused by shifting air conditioning or lab temperatures. Quick Troubleshooting "Cheat Sheet"
The Nexera Virtual Advisor highlights key indicators often missed in the manual: Power Indicator Bar: Green: All systems go. Orange: The unit is in Sleep Mode to save lamp life.
Red: An error has occurred (often a lamp failure or communication break).
Common "Drift" Culprit: If your baseline is drifting, it’s often dirty cell lenses rather than the lamp itself. You can dismantle the flow cell to clean or replace these lenses. The Shimadzu SPD-20A Go to product viewer dialog
The Bubble Fix: If you see "sawtooth" or regular spikes in your data, it's usually air in the cell. A common lab trick is to apply light backpressure to the cell outlet using a syringe or specific tubing to force the bubbles out. SPD-20A vs. SPD-20AV If you have the
variant, it adds a Tungsten lamp to the standard Deuterium lamp. This allows it to cover the full spectrum (190–900 nm) with simultaneous illumination, meaning no warm-up delays when switching between UV and visible light ranges. UV-VIS detector / Photodiode Array Detector - Shimadzu
The Shimadzu SPD-20A user and service manuals outline operation, maintenance, and technical specifications for the high-sensitivity UV-VIS detector. Key details include a 190 to 700 nm wavelength range, 0.5 x 10⁻⁵ AU noise levels, and maintenance procedures such as lamp replacement. For the full service manual, visit
Shimadzu SPD-20A Service Manual | PDF | Optical Filter | Light
The Shimadzu SPD-20A Prominence UV-VIS detector is a foundational component of high-performance liquid chromatography (HPLC) systems, valued for its sensitivity and reliability. This guide provides a comprehensive overview of the essential information typically found in the SPD-20A user manual, from technical specifications to routine maintenance. 1. Key Technical Specifications
Understanding the hardware capabilities is the first step toward optimal performance. Wavelength Range: 190 nm to 700 nm. Light Source: Deuterium (D2) lamp. Noise Level: 0.5 x 10⁻⁵ AU (world-class sensitivity).
Linearity: Up to 2.5 AU (ASTM standard), allowing for the analysis of major components and trace impurities in a single run.
Dual-Wavelength Mode: Enables simultaneous monitoring of two different wavelengths to verify peak purity. 2. Installation & Setup
Before operation, ensure the environment meets these critical safety and performance standards:
Environment: Install in a well-ventilated room, away from corrosive gases, sparks, or strong magnetic fields.
Physical Space: Place on a stable, level surface with at least 600 mm of depth and maintain 100 mm of clearance at the rear for proper airflow.
Connection: The SPD-20A can be operated as a standalone unit using the front panel keypad or integrated into a system via a Shimadzu CBM-20A controller for centralized software control. 3. Operating Procedures
Standard daily operations follow a specific sequence to protect the instrument: The Complete Guide to the Shimadzu SPD-20A User
Power On: Turn the main power switch to ON. The power indicator bar on the right side of the display will turn green.
Lamp Activation: For standalone use, navigate to the SPD-20A panel and switch the lamp from "off" to "D2". If using software, the lamp can be programmed to ignite upon method download.
Equilibration: Allow the lamp to warm up (typically 30–60 minutes) and the baseline to stabilize before starting an analysis.
Baseline Zeroing: Use the [Auto-Zero] function to set the current absorbance to zero. 4. Routine Maintenance
To prevent downtime, users should adhere to the following maintenance schedule:
Shimadzu SPD-20A Service Manual | PDF | Optical Filter | Light
This can be used as a product description, a training guide summary, or a technical documentation overview.
The Shimadzu SPD-20A is a cornerstone of modern high-performance liquid chromatography (HPLC). As a UV/Vis spectrophotometric detector, it is renowned for its sensitivity, dual-wavelength capability, and exceptional noise reduction. However, to truly leverage its power, one must master its documentation: the Shimadzu SPD-20A user manual.
Whether you are a seasoned chromatographer, a graduate student, or a lab manager training new staff, this guide will walk you through everything you need to know about the official user manual—from where to find it, how to interpret its sections, and how to use it to solve real-world problems.
Before injecting samples, you must zero the detector.
The official PDF is available from Shimadzu’s global support portal. Here are trusted sources:
www.shimadzu.com → Support → Document Library → Search "SPD-20A".manualslib.com and manualmachine.com host scanned copies—but verify they match your revision (look for Revision A or B on the cover).Warning: Avoid sites requiring credit card information. Shimadzu provides user manuals for free as PDFs.
| 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). |
The manual divides maintenance into three categories. Ignoring these voids your warranty.
| 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. |