Model: HOH-G-02
Description:
The flowmeters utilize the transit-time method of stream velocity calculation. This method operates by measuring the time of flight of an ultrasonic beam that is alternately transmitted in and against the direction of flow of liquid in pipes. Since the transmitted beam will be faster in the direction of the flow and slower against it, a differential in the times of flight will occur. This differential is directly proportional to the velocity of the stream inside the pipe.
Practical Applications
Applied to on-line measure and system monitor for nearly all liquids from petrol chemical, metallurgy, electric power plant, irrigation, city water company, energy monitor fields, realize the functions of measuring and checking of flow velocity, flow rate, accumulation and heat quantity of different liquids, and flow rate on/off, liquids distinguish.
Key Features:
- Better than 1% accuracy, better than 0.2% repeatability.
- 128 times of measurement and the revised software make the performance better and the indicated flow more stable.
- RS232 and RS485 serial port
- One or two analog inputs.
- Optional 4-20mA analog output.
- Two OCT output channels
- Ability to measure sew water.
- 4 kinds of different types of transducers can be used, addition with user-defined transducers.
- The internal universal serial bus enables several output modules to be connected to it.
- All the parameters can be solidify into the flash memory.
- Several optional function module to be chosen to add to the main module.
- 3 different kinds of communication protocol supported by the same time, include MODBUS.
- Date totalizers that can record as much as 128 sets of data by day, 64 sets of data by month. All the data can be retrieved by use of the MODBUS registers
- 32 times of records of power-on and power-off data. Data can be read through MOBUS.
- built-in data logger/printer, full programmable with what to be print ,the start time, interval, and duration.
- Programmable pulse width of OCT output.
- Parallel interface for display and keypad.
- plug-on-and-off display and keypad module can be connected to the serial port of the meter.
- Almost the same menu arrangement make the users of previous version of flow meter very easy to operate.
- A fluid velocity threshold enables the identification of the kinds of fluid.
- Digital inputs can be inputted by used of the analog inputs.
- A full programmable built-in batch controller which can be started by key-pressing, inputs to the analog inputs or through MODBUS protocol.
- Power supply by 15VDC~24VDC/50mA or 15VAC~17VAC/50mA.
Specifications:
1: Operating power: AC 85—264V or isolation DC 24V
2: Current: 50mA (under the condition of connection without keyboard display and sound of buzzer)
3: Signal output: one channel standard isolation RS485 output
One channel isolation 4-20mA or 0-20mA active output.
One channel OCT output (programmed between the pulse width (6-1000ms),default before leaving factory (200ms))
One channel isolation relay output, with positive, negative, net accumulation pulses and different alarm signals.
4: Signal input: two channel three wire system PT100 platinum resistor input loop, to make heat meter has the function of displaying heat quantity.
Three channel 4-20mA input optional, accuracy: 0.1%,has the ability to input the signals of pressure, liquid level, temperature and so on.
5: Display: 2*20 backlit LCD (Chinese and English optional)
6: Operating: 4*4 tactile keypad or magnetic 4 keypads operating (F4 mainframe)
7: Other functions: automatic memory the positive, negative, net totaliser flow rate and heat quantity of the last 512 days, 128 months, 10years
Automatic memory the time of power on/off and flow rate of the last 30 times, realize to replenish by hand or automatically, read the datas through Modbus communication protocol.
8: Protection level: mainframe: IP65, IP68 (F4 mainframe), transducer: IP: 68
9: Ex-proof: EXd װ BT4 (TDS-100F2 type)
10: Transducer: clamp-on type, insertion type, in-line type.
应用范围：可广泛应用于石油化工、冶金、电力、水利、自来水公司、能源监测等几乎所有管道液体的在线计量与系统监测，实现各类流体的流速、流量、累积量及热量的计量与检测及流量开关、流体辨别等功能。
功能特点：
分体式：主机分为壁挂标准型、壁挂防爆型、盘装型和壁挂变送型，传感器分为外夹式、插入式、管段式等，可适应不同的管材及安装环境。
一体式：超声波流量计主板连接一个20 线4 键并口键盘显示器后封装到一个密封的机壳中，实现现场的在线显示与操作。该款产品解决了外缚式和插入式传感器在安装过程中由于人为等原因造成被测管道参数不准确引起误差而造成测量精度下降的问题。具有精度高、量程比宽、无压力损失、安装简单、无需设参等优点。
技术指标：
·测量介质：
种类：水、海水、污水、酒精、各种油类等能传导超声波的单一、均匀、稳定的液体。
浊度：≤ 20000 ppm，且气泡含量小。
温度：-40℃ ~160℃。
流向：可对正反向流量分别计量，并可计量净流量。
·可测管道：
管材：钢、不锈钢、铸铁、PVC、铜、铝、水泥管等一切质地密致管道，允许有衬里。
内径：15mm~6000mm（π 型管段式内径可小至2 mm）。
直管段长度：上游≥ 10D，下游≥ 5D，距泵出口处≥ 30D。
·传感器：
外缚式：
标准S1 型，适用管径DN15~100mm。
标准M1 型，适用管径DN50~700mm。
标准L1 型，适用管径DN300~6000mm。
插入式：
测量管道材质不限（不停产安装），适用于管径DN80 以上。
管段式：
π 型管段式：适用于管径DN15~DN40，整机测量精度±0.5%。
标准管段式：适用于管径DN50~DN1000，整机测量精度±0.5%。
信号电缆：
专用屏蔽双绞线缆，特定场合单根可加长至500m。
防护等级：
IP68（可浸水工作）。
·测量主机：
准确度： 1.0 % ( 时差分辨率40 皮秒)。
重复性：0.2%。
最大流速：64m/s。
测量周期：500ms 时（每秒2 次，每个周期采集128 组数据）。
测量原理：超声波时差原理，4 字节IEEE754 浮点运算。
输入：3 路4~20mA 输入可选，准确度0.1% ，可输入压力、液位、温度等信号，
也可以作为数字接口使用。
输出：电流信号 ( 可选模块)：4~20mA, 阻抗600Ω 浮空，准确度0.1% 。
频率信号 ( 可选模块)：1~9999Hz 之间任选，OCT 输出。
脉冲信号：正、负、净流量及热量累计脉冲，双路OCT 输出
( 其中1 路脉冲宽度6~1000ms 间可编程，默认200ms。) 。
报警信号：双路OCT 输出，可选近20 种源信号。
数据接口：隔离RS485 串行接口。
通讯协议：MODBUS 协议、M-BUS 协议、FUJI 扩展协议 。
工作电流：50mA ( 不连接键盘显示和蜂鸣器不响的条件下)。
环境温度：-10℃ ~70℃。
工作电源：85~264VAC/24VDC。