主要规格及技术指标

"Technical Specification:
Main configuration: 1. Sensor head 2. Custom Chamber kit 3. System controller (host) 4. CO2 injection system 5. LED red and blue light source 6. 9901-013 External light quantum sensor 7. Soil CO2 Efflux Chamber.
主要配置： 1. 传感器头 2. 用户自制叶室 3. 系统控制器（主机）4. CO2 注入系统 5. LED 红蓝光源 6.9901-013 叶室外置光量子传感器7. 土壤呼吸叶室
Main technical parameters:
1. Analyzer Principle: The design principle uses an infrared analyzer positioned at the head of the leaf chamber, eliminating errors caused by time delays and pressure gradients due to the analyzer being located inside the main unit, achieving synchronization between the reference chamber and sample chamber measurements;
2. CO2 Analyzer: Measurement range of 0-3000 µmol mol⁻¹, bandwidth of 10 Hz; 4-second signal noise less than 0.2 µmol mol⁻¹;
3. H2O Analyzer: Measurement range of 0-75 mmol mol⁻¹, bandwidth of 10 Hz; 4-second signal noise less than 0.03 µmol mol⁻¹;
4. Airflow Rate: 0-700 µmol s⁻¹ (with CO2 injection system), 150-1000 µmol s⁻¹ (without CO2 injection system);
5. System Controller: 128MB memory, 64MB hard disk storage space; can be directly connected to a local area network, allowing file drag-and-drop between the photosynthesis instrument main unit and computer; 8 rows x 40 characters display (240×64 dots), LED graphic and backlight display; complete ASCII keyboard, sealed, dustproof, and waterproof; output signals: RS-232 output interface and USB conversion interface;
6. Expansion slot supports plug-and-play flash memory cards and Ethernet cards (the main unit must be equipped with a flash memory card of 512M or more and a 10/100M Ethernet card);
7. Red and Blue LED Light Source: Composition: 40 red LED lights, 20 blue LED lights, output range of 0-2000 µmol m⁻² s⁻¹;
8. CO2 Concentration Control Range: CO2 injection system, 0~> 2000 µmol mol⁻¹;
9. Light Intensity Linear Control Range: 0~>2000 µmol mol⁻¹;
10. Photosynthetically Active Radiation Sensor (includes two sensors: one built-in and one external): Measurement range of 0 ~> 3000 µmol mol⁻¹; absolute calibration: ± 5% (based on NIST standards); stability: changes < ± 2% over more than one year; response time of 10 µs; temperature effect: maximum ±0.15% /°C; cosine correction for incident angles up to 80°; highly stable silicon photodetector (blue light enhanced type).
11. Teaching simulation software and Internet remote control software.

Net photosynthetic rate (PN), stomatal conductance (GS), and transpiration rate (E), intercellular CO2 concentration (CI), atmospheric CO2 Concentration (CA), light quantum flux density (PPFD), leaf temperature (TL), air relative humidity (RH), soil respiration and so on.

主要技术指标：
1.分析器原理：采用红外分析器定位于叶室头部的设计原理，消除了由于分析仪位于主机内所造成的时滞和压力梯度造成的误差，实现了参比室和样品室测量的同步性；
2.CO2分析器：量程0-3000µmol mol-1，带宽10Hz；4秒信号躁声小于0.2µmol mol-1；
3.H2O分析器：量程0-75mmol mol-1，带宽10Hz，4秒信号躁声小于0.03µmol mol-1；
4.气流流速：0-700 µmol s-1（装置CO2注入系统），150-1000 µmol s-1（未装置CO2注入系统）；
5.系统控制器：128MB 内存，64MB硬盘存储空间；可以直接联入局域网，在光合仪主机和计算机之间拖放文件；8行X40个字符显示(240×64点)，LED图形和背景光显示；完整的ASCII键盘，密封、防尘、防水；输出信号：RS-232输出接口和USB转接口；
6.扩展槽支持即插即用闪存卡和以太网卡(主机需配有512M以上容量闪存卡和10/100M以太网卡)；
7.红蓝LED光源：组成：红色LED灯40个，蓝色LED灯20个，输出范围0-2000 µmol m-2 s-1；
8.CO2浓度控制范围：CO2注入系统，0~> 2000 µmol mol-1；
9.光强线性控制范围：0~>2000 µmol mol-1；
10.光合有效辐射传感器（包含内置与外置共两个）：量程0 ~> 3000 µmol mol-1；绝对校准：± 5%（依据美国NIST标准）；稳定性：1年以上变化 < ± 2%；响应时间10µs；温度影响：最大±0.15% /°C；达80°入射角余弦校正；高度稳定的硅光电探测器 (蓝光增强型)。
11.教学模拟软件与Internet远程操控软件.

其主要测量参数包括：净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（E）、 胞间 CO2 浓度（Ci）、大气 CO2 浓度（Ca）、光量子通量密度（PPFD）、叶温（TL）、空气相对湿度（RH）、土壤呼吸等。
"

主要功能及特色

Features and application:
Application: the Li-6400XT measurement system can not only be used to study plant photosynthesis, but also to measure chlorophyll fluorescence, plant respiration, plant transpiration, community photosynthesis and soil respiration. The perfect integration of these functions makes li-6400xt become an important and essential basic research equipment in the field of physiological and ecological research. If equipped with 6400-02 LED red and blue light source and 6400-01 CO2 injection system, a variety of response curves can also be measured, such as light response curve, CO2 response curve, and other important physiological and ecological indicators such as light saturation point, light compensation point, apparent quantum efficiency, CO2 saturation point, CO2 compensation point, carboxylation efficiency and other important physiological and ecological indicators can be further calculated with the support of relevant models.
应用领域： LI-6400XT 测定系统不仅可用于研究植物光合作用，还可用于叶绿素荧光、植物呼吸、植物蒸腾、群 落光合及土壤呼吸等多项指标的测定，这些功能的完美集成使得 LI-6400XT 成为引领生理生态学研究领域 重要的必不可少的基础研究设备。若配备 6400-02LED 红蓝光源和 6400-01CO2 注入系统还可进行多种响应曲线测定，如光响应曲 线、CO2 响应曲线等，并在相关模型支持下进一步计算光饱和点、光补偿点、表观量子效率、CO2 饱和点、CO2 补偿点、羧化效率等多项重要生理生态指标。

主要附件及配置

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