DQL-6J型经纬罗盘仪是一种集多种测量功能于一体的精密仪器，广泛应用于矿山开采、森林资源调查、农田水利、土地规划、地形测绘等一般工程测量。该仪器主要由望远镜组、磁罗盘组、水平度盘组、竖盘组和安平组五部分组成。其望远镜为16倍内调焦式，可在垂直面内360度回转，有效孔径20mm，视场角2°30′，视距乘常数为50，最短视距2米。磁罗盘的磁针长度为67mm，度盘格值1°，能够精确测量磁方位。水平度盘和竖直度盘的度盘格值均为1°，竖直度盘的测角量程为±50°。此外，仪器还配备有角值为30′/2mm的水准器。

DQL-6J型经纬罗盘仪的设计注重实用性和便携性，能够满足多种复杂环境下的测量需求。其安平机构采用球臼式结构，可快速方便地与三脚架连接并调节水平。仪器还设有横轴止动螺旋和微调螺旋、竖轴止动螺旋和微调螺旋，用于精确调整测量角度。在操作过程中，用户可以利用望远镜组的分划板测定目标直径，同时通过磁罗盘组和水平度盘组分别测量磁方位角和水平角。竖盘组则用于测量目标的倾角。这种多功能集成的设计使得DQL-6J型经纬罗盘仪在野外测量中能够高效完成多种测量任务，为相关领域的作业提供了可靠的测量工具。

The DQL-6J Theodolite Compass is a precision instrument that integrates multiple measurement functions and is widely used in various fields such as mine exploitation, forest resource surveys, farmland water conservancy, land planning, and general engineering surveys. The instrument is mainly composed of a telescope group, a magnetic compass group, a horizontal circle group, a vertical circle group, and a leveling group. The telescope is a 16x internal focusing type, capable of rotating 360 degrees in the vertical plane, with an effective aperture of 20mm, a field of view of 2°30′, a stadia constant of 50, and a minimum sighting distance of 2 meters. The magnetic compass features a needle length of 67mm and a degree plate with a graduation value of 1°, allowing for precise magnetic azimuth measurement. Both the horizontal and vertical circles have a graduation value of 1°, and the vertical circle has a measuring range of ±50°. Additionally, the instrument is equipped with a level with an angular value of 30′/2mm.

The DQL-6J Theodolite Compass is designed with practicality and portability in mind to meet the measurement needs in various complex environments. The leveling mechanism uses a ball-and-socket structure, which can be quickly and conveniently connected to a tripod and adjusted to a level position. The instrument also features horizontal and vertical axis locking screws and fine-tuning screws, which are used for precise angle adjustments. During operation, users can use the reticle in the telescope group to measure the diameter of the target, while the magnetic compass group and horizontal circle group are used to measure the magnetic azimuth and horizontal angle, respectively. The vertical circle group is used for measuring the inclination angle of the target. This multifunctional integrated design enables the DQL-6J Theodolite Compass to efficiently complete a variety of measurement tasks in the field, providing a reliable measurement tool for operations in relevant fields.