石膏收缩膨胀仪是检测仪器，用来测定石膏、砂浆、水泥的收缩和膨胀变形量，以确定其收缩系数和膨胀参数。使用前务必仔细阅读说明书。并由**实验人员操作，以避免操作不当引起的伤害。如需了解更多资料请与我公司客服人员联系。石膏收缩膨胀仪由上海荣计达仪器科技有限公司提供，设备质保期一年，一年内产品如有质量问题，供方负责免费维修。如果因操作不当或者人为损坏，我公司亦应提供维修、更换服务，由此产生的费用我公司会酌情收取。
Gypsum shrinkage and expansion meter is a testing instrument used to determine the shrinkage and expansion deformation of gypsum, mortar, and cement to determine its shrinkage coefficient and expansion parameters. Be sure to read the instructions carefully before use. It is operated by ** experimental personnel to avoid injury caused by improper operation. For more information, please contact our customer service staff. Gypsum contraction dilatometer is provided by Shanghai Rongjida Instrument Technology Co., Ltd. The equipment warranty period is one year. If the product has quality problems within one year, the supplier is responsible for free maintenance. If due to improper operation or man-made damage, our company should also provide repair and replacement services, and the costs incurred by our company will be charged at our discretion.
石膏收缩膨胀仪技术参数:
★标准棒长度 175mm
★标准棒膨胀系数 15×10-6/℃
★位移计精度 0.01mm
★位移计量程 ±5mm
★百分表A小刻度值：0.01mm
★百分表A大量程：10mm
★测量范围：170～180mm
★测头球面孔半径：R=3mm
★标准杆基长：175mm
★外形尺寸 220×220×510mm
Technical parameters of gypsum contraction dilatometer:
Standard rod length: 175mm
★ Standard bar expansion coefficient 15 × 10-6 / ℃
★ Displacement meter accuracy 0.01mm
★ Displacement measurement range ± 5mm
★ Small scale value of dial indicator A: 0.01mm
★ Large range indicator A: 10mm
★ Measuring range: 170 ～ 180mm
★ Probe ball face radius: R = 3mm
★ Base length: 175mm
★ Dimensions 220 × 220 × 510mm
石膏收缩膨胀仪使用方法：
★先将标准棒置于工作台上，拧动调整螺丝使之近似垂直。
★将测量框架置于标准棒的顶头，调整螺杆和螺母，使百分表对准零位（或记下百分表之刻度）。
★将制作养护好的试件两端擦拭净，然后放置在工作台上，然后把测量框架套在试件上，并左右移动表框，使试件与测量框架的测量头准确地接触，此时即可开始读数，并记录下表盘上的刻度值。
★如果实验不是连续进行或实验历时较久后，则在测试前须先在标准棒上校准测量框架。
How to use gypsum contraction dilatometer
★ Put the standard rod on the workbench first, and turn the adjustment screw to make it almost vertical.
★ Place the measuring frame on the top of the standard rod, adjust the screw and nut to make the dial indicator align with the zero position (or write down the dial indicator scale).
★ Wipe the two ends of the prepared and cured test piece, then place it on the workbench, then put the measuring frame on the test piece, and move the table frame left and right, so that the test piece and the measuring head of the measuring frame accurately contact. You can start reading and record the scale value on the dial.
★ If the experiment is not continuous or the experiment lasts a long time, the measurement frame must be calibrated on the standard bar before the test.
SP-175石膏收缩膨胀仪使用注意事项:
★使用时，忌用手直接与标准棒接触，应持外外套部分，以防止标准棒受人体手温的影响。
★仪器用毕后，应将测量框架的测量头和百分表探拭净，并涂以钟表油；测试过程中，应使百分表的测头缓慢而平稳地与试件接触，不允许冲击和碰撞，严禁将百分表测杆顶过A大量程范围，以免影响表的灵敏度和使用寿命。
SP-175 plaster contraction dilatometer precautions:
★ When in use, do not touch the standard rod directly with your hand, and you should hold the outer jacket to prevent the standard rod from being affected by human hａnd temperature.
★ After the instrument is used, the measuring head and dial indicator of the measuring frame should be cleaned and coated with clock oil; during the test, the dial indicator should be brought into contact with the test piece slowly and smoothly. For impact and collision, it is strictly forbidden to push the dial gauge rod over a large range of A to avoid affecting the sensitivity and service life of the meter.
