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微机进行数据处理，光、机、电紧密结合，能进行内外尺寸精密直接测量的卧式高精度万能测长仪。主要用于对平行平面状、圆柱状、球状类精密量具和零件的外形、内孔、尺寸的测量。利用各种随机附件，亦可进行内外螺纹中径等多种特殊测量。
特点：用计量光栅作仪器长度基准，长度基准溯源性好，精度高；用机动，自动代替手动操作，使仪器测量稳定可靠。按"实时综合修正"方法，用计算机软件对仪器测量误差实行总体性的一并修正。测量结果即能数字显示，又能自动打印记录。
It is one of the basic length-measuring instruments for metrological departments. It is applicable for both direct and comparative measurements of outer and inner dimensions of workpieces such as parallel planes, spheres, cylinders and bores. By using various accessories, it can be used for special measurements, such as pitches of male threads and female threads.
■特点介绍■技术规格使用范围
Measuring range外尺寸测量 Outer measurement 0-500 mm内尺寸测量 Inner measurement 1-200 mm外螺纹测量 Male thread ≤180 mm内螺纹测量 Female thread 16-140 mm直接测量范围
Direct meas.range0-100mm读数显微镜分度值
Reading microscope grad.0.1μm仪器误差
Instrument error外测 Outer ±(0.3 L/500) μm L以mm计内测 Inner ±(0.6 L/500) μm L以mm计示值稳定性
Indication stability0.1μm使用环境
Working temperature（20±5）°C, <0.5°C/小时仪器体积
Dimensions
95×39×49 cm仪器重量
Weight
90kg标准配件
Standard attachments 内测装置Internal measurement device
小孔测量装置Small bore measuring device
标准环规Standard ring gauge
外螺纹测量装置Male thread measuring device
内螺纹测量装置Female thread measuring device
各种测头测帽Variety of measuring heads & tips
JDY-4高精度万能测长仪