This method is suitable for the new purchase and use of the standard curing cement and check the box after maintenance. (A) Overview of cement curing box is under the cement specimen temperature 20 ± 1 ℃, relative humidity greater than 90% of the standard maintenance. (B) technical requirements for temperature: 20 ± 1 ℃, relative humidity greater than 90%. (C) the instrument calibration standard wet thermometer (four) calibration method to monitor the temperature of dry and wet temperatures were also set at 19,20,21 ℃, into the wet thermometer, close the door, the h after the test temperature display wet and dry and wet thermometer temperature values ??on the value of the difference should not exceed ± 1 ℃. (E) verify the results of processing the check results meet the technical requirements for qualified, those who pass before use. (Vi) a year calibration cycle. (Seven) Appendix checksum record sheet format. Urumqi Xin Bridge Instrument Co., Ltd. is approved by the relevant state registration of enterprises, is a research and development, production, processing and sales for an integrated enterprise, strong technical force, complete testing means many years of great assistance in research institutions under product constantly updated to provide you with quality test equipment in line with national and industry standards. The main production and operation: concrete, asphalt, soil, cement, engineering and other test equipment and testing equipment, products are sold throughout the country, praised by users. I always follow: "integrity first, quality first" principle, with a number of enterprises established long-term cooperative relationship. Warmly welcome friends to visit, study, business negotiations. Company Name: Urumqi Xin Bridge Instruments Ltd. Tel: 0991-3841286 Fax: 0991-3841286 Mobile: 15099690705 Manager Zhao Mobile: 13319859286 Yang-mail: xjlqyq@126.com Website: http: //www.xjlqyq.com Address: Urumqi Taiyuan Nan Luya electromechanical market 242D