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HBRV(D)－187.5D1型布洛维硬度计采用了旋转式试验力变换机构和光学测量系统，在机体上装有显微镜测量装置。因采用低速同步电动机控制自动加卸试验力, 试验力保持时间可通过延时电位器实现无级可调，除洛氏硬度试验要求表盘人工对零外，布氏硬度试验和维氏硬度试验分别通过显微镜测量压痕的直径和对角线，没有人为的操作误差。
该机具有较高的测试精度，操作简便、灵敏度高、使用方便，变荷可靠，示值稳定，广泛适用于工厂车间、试验室、大专院校和科研机构。
HBRVD-187.5D1 Brinell Rockwell &Vickers Hardness Tester using rotary power conversion and optical measuring system in the body microscope equipped with measuring devices. As a result of using low-speed synchronous motor control unloaded automatic test force, tester force dwell time through change of the delay potentiometer, with the exception of Rockwell hardness test requirements of artificial dial zero, the Brinell hardness test and Vickers hardness test through microscopes and measuring the diameter of the indentation diagonal, not man-made error of the operation.
The hardness tester has high test accuracy, simple, sensitive and easy to use, reliable the Pressure selecing changed , showing the value of stability, applicable to the wide range of factory floor , Laboratories, universities and research institutions.
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主要技术参数
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Main technical parameters
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初试验力(N)：98
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Preliminary test force(N)：98
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总试验力
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Total test force
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维氏硬度试验(N)：294、588、980
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Vickers hardness test(N)：294、588、980
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洛氏硬度试验（N）：588、980、1471
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Rockwell hardness test(N):588、980、1471
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布氏硬度试验(N)：306、613、1839
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Brinell Hardness test(N):306、613、1839
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显微镜放大倍率：37.5×、75×
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magnification of microscope：37.5×、75×
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测微鼓轮ZUI小分度值:
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Measure tiny drum wheel minimum scale division value：
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37.5×时为0.004毫米
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0.004mm for 37.5×
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75×时为0.002毫米
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0.002mm for 75×
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总试验力保持时间(s)：1-30
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Total test force dwell time(s)：1-30
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试件允许ZUI大高度(mm)：170
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Max height of speciments(mm)：170
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压头中心到机身距离(mm)：140
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Distance from indeneter, s center to outerwall(mm)：140
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硬度计外形尺寸(mm)：463×241×660
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Machine size(mm)：463×241×660
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电源电压：AC220V
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Power supply：AC220V
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光源电压:5V/5W
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Light voltage:5V/5W
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仪器重量(kg)：75
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Weight(kg)：75
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硬度测试范围
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Degree of hardness test seope
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洛氏硬度试验
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Rockwell hardness test
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(70-85)HRA
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(70-85)HRA
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(30-100)HRB
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(30-100)HRB
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(20-67)HRC
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(20-67)HRC
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示值精度：±1HR 示值重复性:0.8HR
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Show value accuracy：±1HR repeatability：0.8HR
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布氏硬度试验
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Vickers Hardness test
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(8-650)HB
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(8-650)HB
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示值精度(δ/％):±2.5 示值重复性(Hcf/％):≤3.0
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Show value accuracy(δ/％):±2.5 repeatability(Hcf/％):≤3.0
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维氏硬度试验
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Vickers hardness test
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(14-1000)HV
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(14-1000)HV
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示值精度(δ/％):±2 示值重复性(Hcf/％):≤2.5
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Show value accuracy(δ/％):±2 repeatability(Hcf/％):≤2.5
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