The use and precautions of the ball rebounding test machine:
Scope and function:
Suitable for measuring the falling ball resilience of flexible polyurethane foam.
The instrument freely falls on the sponge foam sample at a specified height by a steel ball of standard specified diameter and mass, and automatically calculates the percentage of the maximum height of the rebound of the steel ball and the ratio of the drop height of the steel ball (both rebound rate) to The rebound rate indicates the rebound resilience of the foam.
According to the standard test requirements, each sample has 3 samples, each sample is tested three times, each time taking the maximum value, and taking the average of the three maximum values ​​to obtain the rebound height and rebound rate. The instrument fully meets the standard requirements. Automatically record data and automatically determine the maximum value, automatically calculate the average rebound height and average rebound rate, and can set numbers and save data for different batches of samples, easy to query and manage, or print data on current test data. .
Falling ball rebound tester selection and precautions
1. The difference between electric release steel ball and manual release steel ball:
A: Manual release: The principle of manually releasing the steel ball is to suck the steel ball through the magnet on the handle, and then separate the handle and the steel ball by artificial external force, which will inevitably cause the steel ball to deviate and rotate during the falling process, which will inevitably result. When the steel ball comes into contact with the sample, it will hit the wall and deviate from the center, and each person or the same operator will have different errors in each operation, which will cause errors in the result and affect the success rate of the test.
B: Electric release: The principle of electric release steel ball is that the steel ball is perpendicular to the electromagnet and fixed in the center position of the plexiglass tube. After the power is turned off, the electromagnet loses its magnetic force and then falls freely, rebounding after contact with the sample, greatly improving Test efficiency and data reliability. At the same time, it also satisfies the requirement that the steel ball is not allowed to rotate and is in the center position when it is dropped.
2. Advantages of both manual and automatic readings:
The accuracy of the automatic degree is relatively high, but if the test result is wrong due to an operation error or due to unevenness of the sample, the comparison can be made by manual reading, which effectively reduces the probability of error, thereby making the test data more rigorous.
3. Requirements for the value of the test results of the ball returning rebound:
In the standard, the test results are summarized as follows: 3 samples per group, 3 results for each sample, the maximum value from 3 results, and the average of 3 maximum values ​​as the sample The average rebound rate. However, some manufacturers' instruments on the market fail to understand the requirements of the standard for test results, which leads to unreliable test results. At the same time, the customer's attention and attention to this item is not enough, I hope to attract your attention.
After sales service
After-sales service unit: Beijing Guanzheng Precision Electric Instrument Co., Ltd.
After sales content:
First, the product is free of charge for one year from the date of acceptance of the customer, and lifetime maintenance.
Second, the product system software free upgrade for life, you can increase the experimental function according to the special requirements of users!
Equipment installation:
The product is guaranteed for one year free of charge from the date of customer acceptance and lifetime maintenance.
Equipment acceptance criteria:
The user side accepts the inspection according to the technical requirements of the order. And in line with national standards.
Equipment repair service:
Our company's products are free of charge within one year after the user's on-site test and acceptance, and lifetime maintenance. In the one-year free warranty period, the product has non-human quality problems, and our company provides free maintenance for customers. If the product fails outside the free warranty period, the repair service will only charge the material cost.
Technical Support:
For the users of the required instruments, provide professional technical solutions according to the requirements of the users. In addition to the regular instrument services, our technical department can also provide users with technical support for various non-conventional devices.
After sales response:
After receiving the user's maintenance invitation, respond within 2 hours and solve it. If it is not resolved, our company assigns engineers to arrive at the user site in time to solve the problem until the device is in normal use.
Paid service:
During the warranty period, paid maintenance services will be implemented in the following cases:
(1) Damage caused by man-made or irresistible natural phenomena
(2) Failure or damage due to improper operation
(3) Damage due to improper installation of the product
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