一、产品简介：

数显砂浆收缩膨胀仪是我公司依据行业标准JGJ70-90《建筑砂浆基本性能试验方法》而设计，是实验室检测砂浆物流性能的仪器。采用数显千分表显示，精度0.01mm。操作简单方便。用来测定砂浆的收缩和膨胀变形量，以确定其收缩系数和膨胀参数。

Product introduction:

Digital Mortar Shrinkage Dilatometer is designed by our company based on the industry standard JGJ70-90 "Testing Methods for Basic Performance of Construction Mortar", and it is an instrument for testing mortar logistics performance in the laboratory. Digital dial indicator is used to display, the accuracy is 0.01mm. The operation is simple and convenient. Used to measure the shrinkage and expansion deformation of mortar to determine its shrinkage coefficient and expansion parameters.

二、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:

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

三、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。

Third, use method:

★ 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.

四、使用注意事项:

★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大量程范围，以免影响表的灵敏度和使用寿命。

★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。

★应安放在平整的工作台上，其四个脚应受力均匀，切忌三点着力，以防仪器变形而影响精度。

★标准杆是仪器的基准长度单位，必须轻拿轻放，防止变形。

★百分表为精密部件，试件放置及取出时应轻稳仔细，切勿碰撞表架及表杆。

★每次使用完毕，应在非油漆件表面涂少许润滑油，在百分表活动零件表面涂仪表油。

★粉尘浓度高的环境或较长时间停用，应采取防尘措施。