I. Principle of Scanning Electron Microscope 1. Electron Optical System: Components: Electron gun, electromagnetic lens, scanning coils, and sample chamber. Function: The electron gun generates a high-energy electron beam, which is focused by the electromagnetic lens and raster-scanned across the sample surface. 2. Signal Detection and Processing: Interaction: Electron beam interacts with the sample to produce signals such as secondary…
Month: September 2024
Rheometer: Principles, Brand,Usage, Common Faults, and Maintenance
1. Principles of Rheometer A rheometer is an instrument used to measure the rheological properties of fluids under different conditions. Its measurement principles are based on applying stress or strain to the fluid and measuring the fluid’s response under these conditions. The specific principles include: Rotational Rheometer: By rotating the measuring element (such as a rotor or cone), shear strain…
Trace Oxygen Analyzer: Principles, Brands & Models, Usage, and Troubleshooting Guide
I. Classification of Trace Oxygen Analyzer Principles Trace oxygen analyzers are crucial tools for detecting minute amounts of oxygen in the environment. Their principles are mainly categorized into fuel cell and zirconia methods. 1. Fuel Cell Trace Oxygen Analyzer Principle: Utilizes a fully sealed fuel cell oxygen sensor consisting of highly active oxygen and lead electrodes immersed in a KOH…
ACS530 VFD 5098 Alarm Fault Analysis and Troubleshooting
ACS530 VFD 5098 Alarm Fault Analysis and Troubleshooting When working with ABB’s ACS530 series VFDs (Variable Frequency Drives), encountering specific fault alarms such as the 5098 alarm can be a concern. While the ACS530 series manual may not directly mention this alarm code, by referencing the manual of its similar ACS580 series VFDs, also from ABB, we can gain insight…
Working Principle, Operation, and Maintenance of Dispensing Machines
Working Principle and Operation of Dispensing Machines Working Principle:Dispensing machines primarily utilize compressed air or pressure systems to transfer adhesive from the reservoir to the dispensing nozzle, with precise control of adhesive flow rate and direction achieved through control valves. During operation, the machine applies adhesive accurately onto workpieces at predetermined positions and shapes, based on preset parameters such as…
Understanding and Using a Colorimeter: Principles, Instructions, Faults, and Brands
Colorimeter: An Optical Measurement Instrument Simulating Human Eye’s Response to Red, Green, and Blue Light I. Working Principle of Colorimeter Optical System: The colorimeter typically consists of a light source, a sample, and a detector (or sensor). The light source emits light (which can be white light or specific wavelengths, such as the D65 light source simulating natural lighting conditions),…
Introduction to Colorimeter: Working Principle, Usage, Faults, and Repair by Longi Ectromechanical Company
Colorimeter: An Optical Instrument for Color Measurement 1. Introduction to Colorimeter A colorimeter is an optical measurement instrument that simulates the human eye’s response to red, green, and blue light. It assesses color differences by measuring the intensity of light reflected or transmitted from the surface of an object, based on the concept of color space. 2. Working Principle of…
Potentiometric Analyzers: Common Faults, Maintenance, and Specifications
Potentiometric Analyzers (e.g., Zeta Potential Analyzers) in Laboratory and Industrial Applications: Common Faults and Maintenance I. Common Faults and Repair Methods No Power, Power Indicator Not Lit Fault Causes: Main power circuit breaker tripped. Power fuse blown. Indicator light damaged. Repair Methods: Check for short circuits in the device and reset the circuit breaker. Replace the fuse or indicator light.…
Comprehensive Guide to Particle Size Analyzer Faults, Repairs, and Preventive Measures
Particle Size Analyzer (Also known as: Particle Size Tester, Automatic Laser Particle Size Tester, Laser Particle Size Analyzer, Laser Particle Size Tester, Nano Image Particle Size Analyzer, Mean Particle Size Determinator, Particle Size Determinator, Spray Particle Size Tester, Particle Diameter Analyzer) I. Common Fault Conditions and Troubleshooting 1. Instrument Running Unstably or Stopping: Possible Cause: Power supply issues or internal…
Ozone Analyzer: Composition, Working Principle, Faults, and Repairs
I. Introduction to Ozone Analyzer Basic Composition The ozone analyzer primarily consists of a low-pressure UV lamp, optical wave filter, incident UV light reflector, ozone absorption cell, sample photoelectric sensor, sampling photoelectric sensor, output display, and circuit components. These components work in unison to achieve precise measurement of ozone concentration. Working Principle The working principle of the ozone analyzer is…