峡新线、司高线、禾洋线干管工程管材及设备供货国际竞争性招标项目招标文件修改澄清文件各投标人：峡新线、司高线、禾洋线干管工程管材及设备供货国际竞争性招标项目（招标编号：****-***B********）已于****年*月**日发布招标公告，并开始公开接受投标报名。根据我方已收到的投标人要求对有关技术规范进行澄清的书面申请情况，经研究，现对原招标文件中有关设备的技术参数要求作必要的修改澄清。修改澄清的具体内容如下：*、本项目招标编号为****-***B********，合同包编号G*。*、招标文件中投标文件递交截止日期修改为****年*月 **日，时间: **时*分 (北京时间)，地址为中国广东省广州市东风中路***号东照大厦，广东省*******楼***开评标室。开标时间修改为****年*月**日，时间为 **时*分(北京时间)，开标地点修改为中国广东省广州市东风中路***号东照大厦，广东省*******楼***评标室。*、招标文件第六章第***.******.***.**.*（*）—（a）PH在线分析仪修改为：（a）PH在线分析仪用途：测量、显示和传输水处理过程中的pH值和温度。pH传感器：* 测量原理：差分电极，带双阶参比电极（接地电极和参比电极），自动温度补偿；* 测量范围：*~**pH；* 灵敏度：≤*.**pH；* 工作温度范围：*~**℃；* 水样流速：最大*m/s；* 电缆长度：*.*米，可延长；* 防护等级：IP**。控制器技术参数：* 显示：图形数据点阵LCD，带LED背景灯照明，半透明反射式；在任意光线下可读；* 探头输入：单通道* 输出：两路模拟的*/*-**mA输出信号；* 外壳防护等级：NEMA*X/IP**；* 电源：***~***VAC±**%， * 通讯协议：MODBUS * 安装方式：壁挂/面板/夹管式安装；* 外壳材质：聚碳酸酯，铝质（镀粉末）；*、招标文件第六章第***.******.***.**.*（*）—(b)余氯在线分析仪修改为：(b)余氯在线分析仪用途：用于自来水厂、自来水管网中加氯消毒过程中的余氯测量、显示和传输。技术参数：* 测量原理：DPD比色法，可准确测量余氯含量；* 利用内置曲线校正；* 自动浊度、自动色度补偿；自动诊断* 测量范围：*~*mg/L的余氯* 精度：读数的±*%或±*.***mg/L 按Cl*计，取较大者；* 样品流量：***~***mL/min；* 样品压力范围：*.***~*.*Mpa；* 电源：***~***VAC，**/**Hz；* 防护等级：IP**，室内安装；** 仪器安装方式：壁挂/面板/夹管式安装。*、招标文件第六章第***.******.***.**.*（*）—(c)低量程浊度分析仪修改为：(c)低量程浊度分析仪用途：用于自来水厂和自来水管网过程中浊度的测量、显示和传输；浊度传感器技术参数：* 测量原理：**°散射光，内置气泡去除系统；* 量程：*.****-***NTU；自动选* 精度：*~**NTU：读数的±*%或±*.**NTU，**~***NTU：读数的±*%；* 分辨率：*.***NTU；* 重复性：优于读数的±*.*%或±*.***NTU；* 操作温度：*~**℃（单探头）* 水样温度：*~**℃；控制器技术参数：* 显示：图形数据点阵LCD，带LED背景灯照明，半透明反射式；在任意光线下可读；* 探头输入：单通道* 输出：两路模拟的*/*-**mA输出信号；* 外壳防护等级：NEMA*X/IP**；* 电源：*** ~ ***VAC±**%* 通讯协议：MODBUS* 安装方式：壁挂/面板/夹管式安装；* 外壳材质：聚碳酸酯，铝质（镀粉末）；*、招标文件中其他技术规范要求不作修改。******广东省**********年*月**日Clarification for Procurement of Pipe and Equipment Supply of Main Pipeline Project of Xiaxin Line, Sigao Line and Heyang LineAll bidders,Pipe and Equipment Supply of Main Pipeline Project of Xiaxin Line, Sigao Line and Heyang Line（Bidding No.：****-***B********）had published bidding advertisement on ** March **** and got ready for bid registration. According to the written documents requesting clarification on related technical specifications requirements received from the bidders, through study, we hereby make necessary clarifications and revisions on the technical parameters of related equipment in the previous bidding document. Detail clarifications and revisions are as follow:*. The Bidding Number of this project is ****-***B******** while the Package Number is G*.*. The bid submission deadline in the bidding document is revised to be **:** AM, May **, **** (Beijing time), and the address is NO. *** Bid opening room on the *th floor, Guangdong Machinery & Electric Equipment Tendering Center Co., Ltd. , Dongzhao Building, No. ***, Dongfeng Middle Road, Guangzhou City, Guangdong Province, China. And the bid opening time is revised to be **:** AM, May **, **** (Beijing time), while the bid opening address is revised to be NO. *** Bid opening room on the *th floor, Guangdong Machinery & Electric Equipment Tendering Center Co., Ltd. , Dongzhao Building, No. ***, Dongfeng Middle Road, Guangzhou City, Guangdong Province, China.*. ***.******.***.**.*（*）—（a）PH on-line analyzer, Section VI of the bidding document is revised as：（a）PH on-line analyzerPurpose: to measure, display and transmit pH and temperature during water treatmentPH Sensor:* measurement principle: differential electrode, with two-order reference electrode (grounding electrode and reference electrode), automatic temperature compensation;*measurement range:*~**pH；*sensitivity: ≤*.**pH；*working temperature range：*~**℃；*water sample flow rate：maximum *m/s；*cable length：*.* m, extendable;*protection level: IP**.Technical Parameters of the Controller：* display：data dot matrix LCD, LED background light, translucent reflection;Readable in any light；*probe input: single channel*output: two-channel analog */*-**ma output signal；*enclosure protection class：NEMA*X/IP**；*power supply：***~***VAC±**%， *communication protocol: MODBUS *installation: wall-mounted/panel/clamped pipe installation;*shell material: polycarbonate, aluminum (coated powder).*. ***.******.***.**.*（*）—(b) Residual Chlorine On-line Analyzer, Section VI of the bidding document is revised as：(b) Residual Chlorine On-line AnalyzerUsage: used for measuring, displaying and transmitting residual chlorine in the process of chlorine disinfection in waterworks and water pipe network.Technical Parameters：* Principle of measurement：DPD colorimetry can accurately measure residual chlorine content;*Using built-in curve correction;*automatic turbidity and chromaticity compensation; Automatic diagnosis*measurement range: *~*mg/L residual chlorine*accuracy: the reading of ±*% or ±*.***mg/L s calculated according to Cl*, whichever is larger;*sample flow rate: ***~***mL/min；*sample pressure range: *.***~*.*Mpa；*power supply：***~***VAC，**/**Hz；*protection level：IP**，indoor installation；**instrument installation: wall-mounted/panel/clamped pipe installation.*. ***.******.***.**.*（*）—(c) Low range Turbidity Analyzer, Section VI of the bidding document is revised as：(c) Low range Turbidity Analyzer,Usage: used for turbidity measurement, display and transmission in the process of water supply plant and water pipe network;Turbidity Sensor Technical Parameters:*Measuring principle: **°scattering light, built-in bubble removing system;*Range：*.****-***NTU；Automatically selection*Accuracy：*~**NTU：±*% or ±*.**NTU of the reading, **~***NTU：±*% of the reading;*Resolution：*.***NTU；*Repeatability：better than reading±*.*% or ±*.***NTU；*Operating temperature: *~**℃（single probe）*Water temperature：*~**℃；Technical Parameters of the Controller：*Display: graphic data dot matrix LCD, lighting with LED background light, translucent reflection type;Readable in any light;*Probe input: single channel*Output: two-channel analog */*-**mA output signal；*Enclosure protection class: NEMA*X/IP**；*Power supply：*** ~ ***VAC±**%*Communication protocol：MODBUS*Installation: wall-mounted/panel/clamped pipe installation;*Shell material: polycarbonate, aluminum (coated powder).*. Other technical specifications requirements in the bidding document are not revised.Chaonan Water Supply CompanyGuangdong Machinery&Electric Equipment Tendering CenterApril **, ****