1、 Preparation before operation

1. Equipment inspection
   • mechanical partCheck whether the various components of the testing machine (such as jaws, screws, and transmission mechanisms) are loose, worn, or deformed to ensure that there are no abnormal noises or jamming.
   • Electrical systemConfirm that the power and grounding wires are securely connected and the voltage is stable (usually 380V ± 10%) to avoid voltage fluctuations affecting the test results.
   • sensor calibrationRegularly calibrate the force sensor (such as once a year) to ensure that the measurement accuracy meets the standard (usually with an error of ≤± 1%).
   • software systemCheck whether the control software of the testing machine is running normally, whether the parameter setting interface is clear, and whether the data storage function is reliable.
2. Sample preparation
   • dimensional accuracyAccording to the standard (such as GB/T 228.1), process the sample to ensure that parameters such as gauge length and diameter meet the requirements, and avoid test failure caused by sample defects.
   • surface treatmentRemove oil stains, rust, or burrs from the surface of the sample to prevent any impact on clamping stability or test results.
   • Clamping positionMark the sample clamping area to ensure symmetrical clamping of the fixture and avoid data deviation caused by eccentric loading.
3. environmental conditions
   • temperature controlMaintain the laboratory temperature within the range of 10 ℃~35 ℃ to avoid changes in material properties caused by high temperatures or equipment lubrication affected by low temperatures.
   • humidity controlRelative humidity ≤ 80%, to prevent electrical components from being affected by moisture, short circuiting, or rusting of samples.
   • vibration isolationPlace the testing machine on an independent foundation, away from vibration sources such as punch presses and air compressors, to reduce external interference.

2、 Standardized operation

1. Parameter Settings
   • loading rateChoose the appropriate strain rate (such as 0.00025/s~0.0025/s) based on the material type (such as metal, composite material) to avoid dynamic effects caused by too fast a rate.
   • Range selectionSelect the sensor range based on the estimated maximum force value of the sample (usually within 80% of the maximum force value) to prevent damage to the equipment caused by exceeding the range.
   • test modeSelect stretching, compression, bending and other modes according to the requirements, and set stopping conditions (such as fracture, reaching the specified displacement).
2. Fixture usage
   • Fixture matchingSelect specialized fixtures based on the shape of the sample (such as circular or flat) to ensure even distribution of clamping force and avoid sample slippage or local stress concentration.
   • clamping forceAdjust the fixture pressure to a moderate level. If it is too tight, it may damage the sample, and if it is too loose, it may cause slippage.
   • Alignment adjustmentConduct a functional or visual inspection through a testing machine to ensure that the axis of the specimen is consistent with the loading direction, with a deviation of ≤ 2%.
3. real-time monitoring
   • Data observationDuring the testing process, pay close attention to the force displacement curve. If there are any abnormal fluctuations (such as sudden drops), stop the machine immediately for inspection.
   • Device StatusListen to the sound of the testing machine running. If there is abnormal noise or increased vibration, it may indicate that the components are loose or damaged.
   • safety protectionEnsure that the protective cover, emergency stop button, and other functions are functioning properly, and the operator should stay away from the area where the sample fractures and splashes.

3、 Post operation maintenance

1. Data storage and backup
   • After the test is completed, the original data (such as force values, displacement, time) should be saved in a timely manner and backed up to the cloud or external storage devices to prevent data loss.
   • When generating a test report, it is necessary to include sample information, testing conditions, result analysis, and other content to ensure traceability.
2. Equipment cleaning and maintenance
   • Mechanical cleaningWipe the oil stains on the surface of the testing machine with a dry cloth, clean the residue on the jaws, and avoid corrosion or wear.
   • Lubrication maintenanceRegularly add lubricating oil (such as lithium based grease) to moving parts such as lead screws and guide rails to reduce friction and wear.
   • Electrical inspectionClean the dust inside the control box, check if the wiring terminals are loose, and prevent poor contact from causing faults.
3. Fault handling
   • Common FaultsIf there is no signal from the sensor or the motor is not running, you can refer to the manual to check the power supply, connection wires, or software settings.
   • Professional maintenanceIf core components (such as servo motors and sensors) are damaged, it is necessary to contact the manufacturer or professional maintenance personnel to avoid disassembling and causing secondary damage.

4、 Safety precautions

1. personal protection
   • Operators are required to wear protective goggles, gloves, and anti smashing shoes to avoid injury from splashing objects when the sample breaks.
   • Long hair needs to be tied up to prevent it from getting caught up in transmission components.
2. safe operation
   • It is strictly prohibited to adjust the position of the fixture or sample during the operation of the testing machine.
   • After the test is completed, unload the force value first and then remove the sample to prevent accidents caused by residual stress.
   • Regularly check the emergency stop button function to ensure quick shutdown in case of emergency.
3. Training and Qualification
   • Operators need to undergo professional training, familiarize themselves with equipment principles, operating procedures, and safety regulations.
   • Newly hired personnel need to operate under the guidance of experienced personnel until their independent operation ability meets the standard.