Desktop X-ray diffractometerXRD is a core equipment in the field of material analysis, widely used in phase analysis, crystal structure characterization, and other scenarios. The accuracy and stability of its operation depend on the daily maintenance of the system. Scientific maintenance measures can not only extend the service life of the equipment, but also avoid detection interruptions caused by faults, ensuring data reliability.

The maintenance of the X-ray generation system is the core. The high-voltage generator needs to maintain a stable working environment, with room temperature controlled at 20-25 ℃ and humidity ≤ 60%, to avoid moisture aging of high-voltage components. Before each startup, the cooling system should be checked to ensure that the circulating water level is within the scale range, the water quality is clear and free of impurities, and the deionized water should be replaced and the filter screen cleaned once a week to prevent pipeline blockage and overheating of the anode target. The maintenance of anode targets should follow the principle of "light use, light stop" to avoid frequent start stop damage to the target surface. When not in use for a long time, preheat the target material for 30 minutes every month to prevent oxidation.

The cleaning and calibration of diffractive optical systems cannot be ignored. The incident slit and receiving slit need to be wiped weekly with a lint free cloth dipped in anhydrous ethanol to remove dust and sample residue, avoiding slit blockage and abnormal diffraction peak intensity. The angle measuring instrument is the core of accuracy, and its rotational flexibility needs to be checked monthly. The guide rail should be maintained with lubricating oil to ensure that the angle repeatability error is ≤ 0.002 °. The sample table needs to be cleaned after each use. If testing powder samples, a soft bristled brush should be used to remove residual powder to prevent it from entering the interior of the angle measuring instrument and causing mechanical jamming.

The maintenance of detectors and electronic systems requires attention to detail. The scintillation detector should avoid direct exposure to strong light, cover with a dust cover promptly after each shutdown, and check the high-voltage circuit connection of the detector quarterly to prevent poor contact from causing signal noise. The data acquisition card and interface need to be regularly dusted to avoid electrostatic interference. Signal calibration should be performed once a year to ensure accurate diffraction peak positions. The instrument software needs to regularly backup data and system configuration, and it is prohibited to install unrelated programs at will to prevent system crashes and data loss.

The key to fault prevention lies in establishing a "daily inspection+periodic calibration" system.Desktop X-ray diffractometerBefore daily startup, it is necessary to confirm the status of key components such as high-voltage switches and cooling systems, and record parameters such as startup voltage and current; If there are abnormalities such as diffraction peak shift or sudden drop in intensity during the detection, immediately stop the machine for troubleshooting. Invite professionals to conduct comprehensive calibration every six months, with a focus on verifying X-ray intensity, angle measurement accuracy, and detector response, to ensure that the equipment meets measurement standards such as JJG 629.

Security maintenance is a bottom line requirement. Lead protective gloves and goggles must be worn during operation to avoid X-ray radiation injuries; Flammable materials are prohibited from being stacked around the desktop X-ray diffractometer, and specialized firefighting equipment should be provided. Establish an equipment maintenance ledger, detailing maintenance time, content, and fault handling to provide data support for long-term stable operation.