一、简介：
本产品是一款经济型分析仪器,选配RS232接口输出. 优良的测光精度高于一般的同档仪器.广泛应用于医疗检测，食品，石化工业，环境保护与监控等众多领域。

二、产品特点：
1、数字显示测量数值
2、自动光门，自动调零调百仪器校正
3、采用原装进口钨灯，保证仪器的使用寿命
4、宽大的样品室，最大可放置10cm的比色皿
5、选配输出端口RS232，可实现连接打印机和连接电脑功能

三、技术参数对比：
型号                                  VIS-721                           VIS-722                           VIS-722(N.S)
光学系统消色差                   Czerny-Turner (1200L/mm grating)
波长范围                      350-1020nm                  320-1020nm                       320-1020nm
波长准确度                         ±2nm                              ±2nm                                  ±2nm
光谱带宽                                6nm                               5nm                                     4nm
波长重复性                          ≤1nm                              ≤1nm                                   ≤1nm
杂散光                        ≤0.1%T @360nm         ≤0.05%T@360nm            ≤0.05%T@360nm
光度准确性                         0.5%T                              0.3%T                                   0.3%T
光度重复性                         0.2%T                              0.2%T                                   0.2%T
漂移                                   ≤0.2%T                            ≤0.1%T                                 ≤0.1%T
噪声                                   ≤0.3%T                            ≤0.2%T                                 ≤0.2%T
稳定性                        ±0.004A/h @500nm       ±0.004A/h @500nm          ±0.003A/h @500nm
工作方式                            T、A、C                           T、A、C                                T、A、C
调零方式                               自动                                   自动                                         自动
波长驱动方式                     手动波长                          手动波长                                  手动波长
打印接口                               选配                                   选配                                           选配
能量（灯源）                     进口钨灯                           进口钨灯                                  进口钨灯
净重                                         8kg                                    8kg                                            8kg
软件支持                                   否                                      否                                               否


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