Operation Guide for Low Temperature Brittle Impact Testing Machine

Basic operating steps

preparation

According to《Preparation of Test Plan for GB5470-2008 Low Temperature Brittle Test Method

Inject industrial alcohol as a heat transfer medium into the cold bath, and the liquid level should be far from the cold slotBelow 20mm, it is advisable to use immersion fixtures

Check if the power wiring of the equipment is correct and ensure good grounding

Sample placement

According to the testing standards, place the sample in a low-temperature environment under the specified conditions

Rubber sample: elongation230mm (multi sample method 8 ± 0.3mm or single sample method 11 ± 0.5mm)

Plastic sample:3.6±0.1mm

temperature control

Set the target temperature (usually-Range of 60 ℃~0 ℃

Wait for the device to reach the set temperature and maintain a constant temperature (after constant temperature)Fluctuations within 3 minutes<± 0.5 ℃)

impact test

withApply impact load at a speed of 2m/s ± 0.2m/s

Record the damage of the sample

Count a sufficient number of samples (recommended not less than)10 of them)

data analysis

Calculate the brittleness temperature using statistical theory（Temperature at which 50% of the sample is damaged

Generate test report

Operation precautions

Safety Specifications

Before modifying settings and exporting signals during instrument operation, safety should be fully considered

Avoid using organic solvents such as alcohol and gasoline to wipe the instrument. It is recommended to use a dry cloth

Without permission, it is not allowed to disassemble or modify equipment to avoid abnormal movements or dangers

Equipment maintenance

Pay attention to preventing dust, wire ends, and other foreign objects from entering during installation to avoid causing malfunctions

During the experimental process, it is necessary to record data in a timely manner to ensure accuracy

Regularly check the accuracy of impact speed and temperature control

test environment

Ensure good ventilation in the laboratory

Avoid using equipment in damp or corrosive environments

Maintain sufficient operating space around the device

Common problem handling

Unstable temperature

Check if the liquid level in the cold bath is sufficient

Verify if the temperature sensor is working properly

Confirm that the equipment has good sealing performance

Impact velocity deviation

Calibrate the impact device

Check if the transmission components are worn out

Data anomaly

Recheck the placement of the sample

Verify whether the ambient temperature affects the test

Check the grounding condition of the equipment

standard reference

The following standard requirements should be followed during operation:

GB/T 5470-2008 "Determination of Brittle Temperature of Plastics by Impact Method"

ISO 812 International Standard

ASTM D2137 American Society for Testing and Materials standard

By following the detailed operation guide above, you can safely and effectively use the low-temperature brittle impact testing machine for material performance testing. For more specific operational guidance, it is recommended to refer to the user manual provided with the equipment or contact the equipment manufacturer for technical support.