* The product is damaged due to incorrect installation and operation.
* Have been repaired, altered, refitted or replaced by anyone who is not our technical personnel.
* The instrument number is altered or inconsistent with the certification. 
* Inadvertent use or infiltration of water, or other substances into the machine, causing damage.
* Equipment for missing invoices or missing warranty cards that not providing relevant certification materials.
 

* Please maintain the warranty card properly by the user, this card can be used as maintenance certificate. 
 
* The quality problems which non-artificial damage, warranty period of host machine shall be 24 months from 
   the date of purchase . * If the equipment is under the warranty period, in the normal use and maintenance, there have problems 
  with the instrument itself, parts, materials and process problems, after the inspection is true, the company 
  will provide free maintenance. Each party bears half the freight cost.