| 仪器型号 | DS20 | DS24 | DS28 | DS32H | | 每公里往返测量标准偏差 | ±2.5mm | ±2.0mm | ±1.5mm | ±0.5mm | | 放大倍率 | 20× | 24× | 28× | 32× | | 物镜口径 | 36mm | 36mm | 40mm | 40mm | | 视场角 | 1º20´ | 1º20´ | 1º20´ | 1º20´ | | 最短视距 | 0.3m | 0.3m | 0.3m | 0.3m | | 视距乘常数 | 100 | 100 | 100 | 100 | | 视距加常数 | 0 | 0 | 0 | 0 | | 防水 | 是 | 是 | 是 | 是 | | 工作范围 | ±15´ | ±15´ | ±15´ | ±15´ | | 安平精度 | ±0.5" | ±0.5" | ±0.4" | ±0.3" | | 圆水泡精度 | 8´/2mm | 8´/2mm | 8´/2mm | 8´/2mm | | 度盘分度值 | 1º | 1º | 1º | 1º | | 仪器净重 | 1.8kg | 1.8kg | 1.8kg | 1.8kg | | 三脚架连接尺寸 | M16or5/8" | M16or5/8" | M16or5/8" | M16or5/8" | | 仪器箱尺寸 | 30*20*20cm | 30*20*20cm | 30*20*20cm | 30*20*20cm |
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