1. Turn on the power, the temperature controller and timer indicator lights up.
2. Inject the freezing medium (usually industrial ethanol) into the cold well. The injection volume should ensure that the distance from the lower end of the holder to the liquid surface is 75 ± 10mm.
3. Hold the specimen vertically on the holder. The clamp should not be too tight or too loose to prevent the sample from deforming or falling off.
4. Press the gripper to start freezing the sample and start timing control switch timing. Specimen freezing time is specified as 3.0 ± 0.5min. During the freezing of the sample, the temperature fluctuation of the freezing medium shall not exceed ± 0.5 ° C.
5. Lift the lifting clamp so that the impactor impacts the specimen within half a second.
6. Remove the sample, bend the sample to 180 ° in the direction of impact, and carefully observe for damage.
7. After the specimen is impacted (each specimen is allowed to be impacted only once), if damage occurs, the temperature of the refrigerating medium should be increased, otherwise the temperature should be lowered and the test shall continue.
8. Through repeated tests, determine the minimum temperature at which at least two samples do not break and the maximum temperature at which at least one sample breaks. If the difference between the two results is not greater than 1 ° C, the test is over.
| Test temperature | -80 ºC -0 ºC |
| Impact speed | 2m / s ± 0.2m / s |
| After constant temperature, the temperature fluctuation within 3 mins of the test | <± 0.5 ºC |
| The distance from the center of the impactor to the lower end of the holder | 11 ± 0.5mm |
| Overall dimensions | 900 × 505 × 800mm (length × height × width) |
| Power | 2000W |
| Cold well volume | 7L |
Our service:
During the whole business process, we offer Consultative Selling service.
FAQ:
Moreover, If your machine doesn’t work, you can send us an e-mail or call us we will try our best to find the problem through our conversation or by video chat if necessary. Once we have confirmed the problem, the solution will be offered within 24 to 48 hours.