XRW-300MB热变形、维卡软化点测定仪运用PLC可编程控制器进行温度调节采用汉字液晶显示操作。该产品操作简单、使用方便、性能稳定、产品精度高，并在试验过程中可时实监控试验温度和变形量；试验结束时系统自动停止加热，该机可设定目标温度具有温度保护功能。该机是各质检单位、大专院校和各企业自检的*仪器。
该机主要用于非金属材料如塑料、橡胶、 尼龙、电绝缘材料等的热变形温度及维卡软化点温度的测定。产品符合IS075(E)、IS0306(E)、GB/T8802、GB／T1633、GB／T1634等标准要求。
      XRW-300MB型具有试样架升降功能，可在试验开始或结束时对试样架进行提升或下降。
主要技术参数：
    温度控制范围：环境温度—300℃
    升温速率:（120±10）℃/h (12±1)℃/6min
                     (50±5)℃/h   (5±0.5)℃/6min
    温度示值误差：0.1℃ 
    温度控制精度：±0.5℃
    zui大形变示值误差：±0.01mm，
    变形测量范围：0—1.5mm
    试样架个数：3个
    负载杆及托盘质量：68g
    加热介质：甲基硅油（运动粘度一般选择200厘斯）或变压器油
    冷却方式：150以上自然冷却，150以下水冷或自然冷却。
    加热功率：4kw
    仪器尺寸：540mm×520mm×970mm

 XRW-300MB thermal deformation, VEKA softening point measuring instrument using PLC programmable controller for temperature adjustment with Chinese character LCD operation. The product is simple, easy to use, stable performance, high accuracy, and can be used to monitor the temperature and deformation during the test. The system automatically stops heating at the end of the test. The machine can set the target temperature with the temperature protection function. The machine is the essential equipment of the quality inspection unit, the tertiary institution and the enterprise self check.
The machine is mainly used for the thermal deformation temperature of non-metallic materials such as plastic, rubber, nylon, electrical insulation materials and the determination of the temperature of the VEKA softening point. Products comply with IS075 (E), IS0306 (E), GB/T8802, GB / T1633, GB / T1634 and other standards.
The XRW-300MB type has the function of the test sample holder, which can improve or decrease the specimen shelf at the beginning or end of the test.
Main technical parameters:
Temperature control range: ambient temperature - 300
Temperature rising rate: (120 10) /h (12 + 1) /6min
(50 5) /h (5 + 0.5) /6min
Temperature indication error: 0.1
Temperature control accuracy: 0.5
Maximum deformation indication error: + 0.01mm,
Deformation measurement range: 0 - 1.5mm
Sample rack number: 3
Load lever and tray quality: 68g
Heating medium: methyl silicone oil (viscosity of the general choice of 200 per cent) or transformer oil
Cooling mode: more than 150 natural cooling, 150 below water cooling or natural cooling.
Heating power: 4kw
Instrument size: 540mm x 520mm x 970mm