As an advanced analytical tool in the field of materials science,The Zeiss EVO series scanning electron microscope, with its modular design and intelligent operating interface, provides researchers with a full process solution from basic imaging to complex analysis.This article systematically outlines its operational process and key technical points.

　　1、 Power on preparation and device self-test

Before starting the Zeiss scanning electron microscope, it is necessary to confirm the environmental parameters: temperature control at 20-24 ℃, humidity below 65%, and normal UPS power supply. Operators need to wear anti-static gloves to avoid contaminating samples or damaging electronic components. After turning on the air switch on the back of the host, press the Standby and On buttons in sequence to enter the self-test program of the system. At this point, it is necessary to observe the operating status of the vacuum pump to ensure that the mechanical pump and molecular pump start normally, and the vacuum gauge reading gradually decreases to below 1.3 × 10 ⁻⁴ mbar.

　　2、 Sample loading and parameter setting

After releasing the vacuum in the sample chamber through the inflation valve, use annular tweezers to install the sample stage fixed with conductive adhesive into the five axis stage. For non-conductive samples, it is necessary to perform gold spraying or carbon coating treatment in advance to eliminate the charge effect. Set the acceleration voltage (EHT) in SmartSEM software. For conductive samples, it is recommended to use 10-30kV, while for non-conductive samples, a low voltage mode of 1-5kV is used in conjunction with electron beam deceleration technology. The working distance (WD) is usually set to 8.5mm, which directly affects the image resolution and signal strength.

　　3、 Imaging mode selection and optimization

The EVO series is equipped with an OptiBeam lens system that supports switching between five observation modes:

1. High vacuum SE mode: using a secondary electron detector (SE2) to obtain surface morphology information, suitable for conductive samples such as metals and ceramics;

2. Backscattered Electron Mode (BSD): Distinguishing material composition differences through atomic number contrast, commonly used in composite material analysis;

3. Low vacuum mode: Water containing or contaminated samples can be observed without spraying gold, and the vacuum degree can be maintained at 20-260Pa;

4. Electron beam deceleration mode: By applying a bias voltage to reduce the effective landing energy, the imaging quality of non-conductive samples is significantly improved.

During operation, it is necessary to combine joystick control to move the stage, use Reduce window for step-by-step focusing, and finally obtain sub nanometer resolution images at a magnification of 100000 times.

　　4、 Integrated operation of energy spectrum analysis (EDS)

After connecting the Oxford Inca X-Act spectrometer, create a project file in AZtec software and select point scan, line scan, or area scan mode. During surface scanning, the number of collection passes needs to be set, and the system will automatically generate element distribution maps and quality percentage reports. Experimental data shows that at a working distance of 8.5mm, the output count rate can be stably maintained above 1000cps, ensuring data accuracy.

　　5、 Shutdown maintenance and data management

After completing the analysis, press Shutdown Gun to turn off the filament, and then turn off the SmartSEM software, EM Server, and host power in sequence. After the system cools down for 30 minutes, turn off the air switch and record the equipment operation log. The raw data needs to be labeled with experimental conditions, and cross device data association can be achieved through ZEN Core software to provide a complete traceability chain for subsequent analysis.

Zeiss scanning electron microscopy reduces the complexity of traditional electron microscopy operations by over 60% through intelligent navigation cameras and automated workflow design. Its modular architecture supports multi scenario applications from basic scientific research to industrial quality inspection, providing efficient and reliable solutions for material characterization.