Specifications
| Swing bar type | Persoz pendulum |
| Swing rod Mass | 500g±0.1g |
| Ball diameter | 8mm（0.3in） |
| Initial swing angle | 12º |
| terminal swing angle | 4º |
| swing period | 1s |
| Glass swing time | 430±10s |
| counting function | automatic |
| size | 400*400*775mm |
Packing list
After-sales instructions
Warranty days: 365 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/47355/Specification.html , which is only used by users who purchase commodities from the NBCHAO.