The vacuum gauge is the core equipment for measuring the pressure (vacuum degree) inside the vacuum system. Its maintenance needs to be combined with the working principle of the vacuum gauge type (such as thermocouple vacuum gauge, ionization vacuum gauge, capacitance film vacuum gauge, etc.), following the process of "fault diagnosis → safety preparation → targeted maintenance → calibration verification" to ensure that the accuracy and safety standards are met after maintenance.
Vacuum gauge maintenance is a service aimed at troubleshooting, repairing, and maintaining vacuum gauge equipment, mainly involving the following core contents:
Maintenance Content
Fault detection: Conduct a comprehensive inspection of the vacuum gauge using professional equipment to locate specific causes such as sensor faults, circuit issues, or mechanical damage.
Component replacement: Replace damaged sensors, sealing rings, hot wires, and other key components to restore measurement accuracy.
System calibration: Use a standard vacuum gauge to calibrate the repaired equipment to ensure the accuracy of measurement data.
Routine maintenance: deal with problems such as poor contact and aging of circuits in daily use.
Deep repair: Disassemble and repair complex faults such as sensor failure and mechanical deformation.
Calibration steps:
Connect the repaired vacuum gauge and the standard vacuum gauge to the calibration system simultaneously;
Gradually stabilize the pressure from low vacuum to high vacuum (covering the measurement range of the vacuum gauge), and record the readings of both;
If the error exceeds the allowable range (such as the thermocouple vacuum gauge's allowable error of ± 15%), adjust it through the vacuum gauge's "calibration button" or software (some models support computer calibration).
Maintenance points:
Check if the calibration parameters drift and recalibrate if necessary.
Check whether the sensor is damaged, such as whether the heating wire is broken or contaminated.
Check if the power circuit is connected properly and if there are any internal circuit faults.