Bronkhorst 布琅轲锶特 MV-302 流量计

The new MASS-VIEW® flow meter series are a digital alternative to the conventional VA meters (variable area meters) or rotameters. The MASS-VIEW® flow meter series incorporates a digital bar graph of actual gas flow, which is, thanks to the OLED (organic light emitting diode) technology, clearly visible from all angles, as well as indicating flow units, gas type and totalised figures. Also available with an optional in-built needle valve for flow control duties, it is designed to mimic the straightforward features and vertical format of the VA meter, but with the considerable added benefits of an electronic output signal, high measuring accuracy, virtual independence from gas temperature and pressure variations, freedom from parallax error and inherently safe construction, by eliminating fragile glass components in the flow path.","The MASS-VIEW® series operates on the principle of direct thermal mass flow measurement, for gas flow ranges from the lowest range (0-0,2 ln\/min) up to the highest range (0-200 ln\/min). Note: * ln\/min equals SLM at 0°C and 1 atm(STP)","It offers a standard accuracy rating of ± 2%RD if the flow is higher than 50% of it’s maximum full scale and ±(1%RD + 0.5%FS) on lower flows, handling pressures up to 10 barg (150 psi). Power consumption is low and mechanical process connections are fitted for straightforward VA meter replacement. The MASS-VIEW®incorporates the latest OLED technology, which gives a brighter readout than LCDs, can be viewed from virtually any angle and has fast signal response times. Alarm settings and the selection of a pre-installed gas or pre-set range are accessed via a user-friendly menu, using a 4-way navigation button mounted on the front plate. An analog output signal enables data logging against various parameters and full accountability of gas flow, such as for shared ring main applications.","Features:

特性

• 清晰指示： -实际流量（条形图和数值） -所需流量单位 -气体类型 -总流量
• 明亮的广角oled显示屏
• 无视差误差
• 几乎不受压力和温度变化的影响
• 低压降
• 宽的流量范围
• 快速响应
• 高精度
• 报警和计数功能(表上有2个报警接点)
• 模拟（0..5 Vdc）和数字通信（Modbus RTU/ASCII，RS-232接口）
• 可配置的密码保护
• 10种预装气体（空气、n2、o2、ar、co、co2、ch4、c3h8、c4h10、n2o）或h2或he
• 4个可选范围（最大满标度范围的100%、50%、25%和10%）
• 数字化校准
• 快速反应
• 报警和计数器功能（仪表上提供2个报警触点）
• 模拟(0 . .和数字通信(modbus-rtu/ascii, rs-232接口)
• 4个可选择的范围(100%，50%，25%和10%的最大full scale范围)
• 数字校准