Other Product Q&A

• Do you provide annual maintenance service?
• What should I do if my condition is not due to the above reasons, or if it cannot be resolved according to the above methods?
• Do I need to remove the rubber band in the sulfuric acid measuring machine?
• The sulfuric acid tester cannot operate but the rest of the functions are displayed normally, why?
• The liquid level is normal, the whole machine still can not operate, why?