: Maintain at least 15 cm of clearance around the cooling vents to prevent overheating.
The Hitachi U-2800 spectrophotometer is a double-beam instrument that offers high accuracy, precision, and reliability in measuring absorbance and transmittance of light by samples. Its advanced features include a wide wavelength range (190-900 nm), high sensitivity, and a user-friendly interface. The device is designed to meet the needs of various applications, including quantitative analysis, qualitative analysis, and kinetics.
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: General brochures and software control guides for the U-series can be found on the Hitachi High-Tech website .
provide summaries of features and handling performance that can serve as a quick-start guide for the Key Features of the Hitachi U-2800 Description Optical System Double-beam system for superior stability and accuracy. Wavelength Range 190 nm to 1100 nm, covering UV and visible regions. Data Storage : Maintain at least 15 cm of clearance
Ensure the downloaded file ends strictly in .pdf . Never open files ending in .exe , .bat , or .msi , as these are executable programs that may contain malware.
| Issue | Potential Cause | Suggested Solution | | :--- | :--- | :--- | | | Instrument not fully warmed up. | Allow the instrument to warm for at least 15–30 minutes. | | | Dirty cuvettes. | Thoroughly clean cuvettes with distilled water and ethanol. | | | Air bubbles in sample solution. | Gently tap the cuvette to remove bubbles. | | Low Light Intensity / High Noise | Aging light source (deuterium or tungsten lamp). | Check the lamp's usage hours in the software. The lamp may need to be replaced. | | Tungsten Lamp Not Illuminating | Burnt-out lamp filament. | Check the lamp with a multimeter for continuity. Replace if necessary, a common point of failure. | | Instrument Fails to Initialize | Obstructed light path. | Inspect the sample compartment and ensure no cuvettes or debris are blocking the light beam. | | Inconsistent Results / High Error | Loose or incorrectly seated cuvette holder. | Remove the cuvette holder and firmly re-insert it until it clicks into place. | | | Path length setting incorrect. | Verify the "path length" in the system settings matches the cuvette used (e.g., 10 mm). | The device is designed to meet the needs
Absorbance (Abs), Transmittance (%T), Reflectance, and Concentration. Installation and Lab Setup
Visit the official Hitachi High-Tech website. Navigate to the documentation, support, or downloads section.
While Hitachi requires registered ownership for certain software updates, standard hardware user manuals can often be downloaded for free via open-access scientific repositories and documentation archives.