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阴极保护电位测试操作规程

For personal use only in study and research; not for commercial use二十三、阴极保护电位测试操作规程一准备工用具：便携式参比电极、数字万用表、铁锹。

二检查1、检查确认便携式参比电极内部必须为饱和硫酸铜溶液（液体和硫酸铜固体并存），并充满容积的1/2以上。

2、检查确认数字万用表灵敏可靠。

三操作1、测试前清理干净参比电极底端的固体和杂质，将参比电极插入管道顶部上方1M范围的地表潮湿土壤中，保持参比电极与土壤电接触良好。

2、打开数字万用表，将量程选择在直流2V电压测试档，将黑色探针接在参比电极上，红色探针接在测试桩接线柱上，读取测量数据，并记录。

如发现保护电位达不到或超过允许范围时，及时向上级领导汇报。

3、对于腐蚀比较严重的地段，测试时应在管道上方距测试点1M左右挖一安放参比电极的深坑，将参比电极置与距管壁3~5CM的土壤上，用电压表调至适当量程，测量数据。

4、测量强制电流阴极保护受辅助阳极地电场影响的管段，应将参比硫酸铜电极朝远离地电场源的地方逐次安放在地表上，第一个安放点距管道测试点不小于10米。

以后逐次移动10米，用数字万用表测量电位，当相临两个安放点测试的电位差小于5mV时，参比电极不再往远方移动，取最远处的管地电位值为该点的管道对远方大地的电位值。

5、认真记录测量数据，并按要求上报。

四注意事项1、保护电位测试采用地表参比法。

每月对沿线所有电位桩检测一次，将所测数据汇总成表，对远传数据进行校核。

2、当管道有过保护或保护不到时，应及时调整两端阴保站内仪器的电位输出，并加强沿线电位测试工作，调整仪器期间应每天测试一次，直到沿线各测试桩电位稳定在－0.85～－1.5V时为止。

3、测试过程中若发现管道上某段电位有陡降现象时，应认真观察周围环境，查找沿管道施工或管道防腐层破坏等原因，及时向上级领导汇报，并协助处理。

阴极保护站内仪器操作规程一操作1、正常工作时两台恒电位仪只能开一台，另一台必须关闭，切换时先关正在使用的恒电位仪，后开另一台。

阴极保护管线电流以及阴极保护电流密度的测定

阴极保护管线电流以及阴极保护电流密度
的测定
一、阴极保护管线电流的测量
(1)电压降法
长线的线路内的电流流动可以根据欧姆定律,先测取一段线路上的电压降,然后根据计算得到电流值。

测量操作的时候要先用数字万用表粗测,并且判断极性然后根据电位差来计算精测。

(2)补偿法
这种方法测量管段的时候长度要跟电压降法一样,然后从电流测试桩中引出4条导线,然后供接线用。

测量的时候要接好测量的回路,然后合上开关,调节可变电阻器,然后当检流计的指示是零的时候,电流表的读数就是管内电流。

二、阴极保护电流密度的测定
已经埋入地下的有覆盖层的管道,需要的保护电流应该采用馈电法。

测量步骤:
①采用夯入法,在垂直测量管道的60-100m处的位置。

②按照设计图进行回路接线,用汽车蓄电池,导线选用铜芯截面1*10m㎡的塑料线
③接通开关之前,需要先进行管段两端的绝缘装置的自然电位的
测量。

④接通开关之后先观察电流表中的电流值的变化,然后测量管地电位。

⑤调节可调电阻器使电位达到负并且跟踪C点的电位,然后在进行观察。

⑥利用开关进行通、断电时间的时候,测量各个点的通、断电电位。

⑦最后用测得的阴极保护电流跟整个管段的表面积相除,就可以得到保护电流的密度。

阴极保护电流分布及电位测量

管道阴极保护电流分布及电位测量施工技术厂家河南汇龙合金材料有限公司1概述在阴极保护中，阳极与保护结构之间的土壤电阻决定了到达保护结构的电流密度，而该电阻又决定于土壤电阻率、埋设位置土壤的截面积，以及阳极到保护结构上某一点的距离。

计算公式为：Ry=r(r/A)(1)式中Ry——阳极与保护结构之间土壤电阻，Wr——土壤电阻率，W·mr——阳极到保护结构上某一点的距离，mA——埋设位置土壤的截面积，m2以位于均匀土壤中的竖直阳极为例，电流以放射状分布，总电流为各方向电流之和。

对于长输管道，由于管道各点距阳极地床的距离不相等，阴极保护电流到达管道各点所经路径的电阻也不相等，因此管道各点的电流密度也不相等。

2阳极与保护结构的距离分析假定其他因素恒定，储罐、管道等保护结构某一点得到的电流与其距阳极的距离成反比。

以储罐底部的阴极保护为例，如果阳极距罐底太近，则电流的分布很不均匀，造成距阳极近的一侧过保护而另一侧保护不够。

如果阳极与罐底的距离增大，则罐底各点与阳极之间的电流回路的电阻差减小，电流分布趋于均匀。

但另一方面，由于阳极与罐底的距离增大，回路的总电阻增大，阴极保护电流减小。

因此需要提高外加电压，从电流分布的角度出发，阳极将有一个最佳位置。

条件允许的情况下，阳极距罐底周边的距离不小于罐直径。

如果做不到这一点，应采用分布式阳极或深井阳极，深井阳极的上端距地面距离不小于10m，以使电流分布均匀。

英国标准BS 7361推荐罐底的阴极保护采用分布式阳极。

对于受阴极保护的长输管道，均匀的电流分布可以通过增大阳极与管道的间距或通过均匀布置阳极来获得。

阳极距管道太近，会使距阳极近的管道部位产生过保护，而距管道远的部位保护不够；阳极距管道太远，会使整条管道欠保护，此时若仍使管道得到充分保护，只有提高外加电压。

阳极的最佳位置应使管道最远端得到有效保护而汇流点处不发生过保护。

由于电流分布还受到土壤电阻率、防腐层状况、管道电阻等多个因素影响，因此阳极与管道的间距应不小于100m，一般为300～500m。

阴保参数测量方法资料

3、将万用表的红表笔插入电压、电阻测试（V.Ω）孔内，将黑表笔插入万用表的（COM）孔（公共端）。将万用表的旋转开关旋转到直流、量程为2V的档位。
4、用红表笔与测试桩的接线柱触接，黑表笔与参比电极连接线连接。
5、此时万用表显示的数据就是测得的管地电位，在没有外界干扰的情况下，管地电位是负值。
远参比法
远参比法主要用于强制电流阴极保护受辅助阳极地电场影响的管段和牺牲阳极埋设点附近的管段，测量管道对远方大地的电位，用以计算该点的负偏移电位。
远参比法的接线示意图如下：
4
V
测
试
3
5
5
5
桩
牺牲阳极或辅助阳极
阳极
1
管道 2
1—辅助阳极或牺牲阳极 5—参比电极 2—管道 3—测试桩 4—数字万用表
采用与管道相同材质的钢片制作一个检查片作为辅助电极，片面除一面中心留下一个 10mm直径的裸露孔外，其余部分全部被防腐层覆盖，埋设于管道附近冻土线以下的土壤中。埋设时裸露孔朝上，覆盖1~2mm细土层后，将长效硫酸铜参比电极底部置于裸露
孔பைடு நூலகம்方，然后回填至地平面。辅助电极的导
线和长效硫酸铜参比电极的导线分别接于测试桩
＜1m 埋地管道
管道保护电位测量接线示意图
1、在管道测试桩附近的1m范围内，选择地表相对潮湿的土壤插入参比电极。
2、插入土中的参比电极应垂直地面、稳定、可靠地与土壤接触，底部不能垫有草叶或草根。遇有干燥土壤时，应用携带的淡水润湿其周边的土壤，使参比电极与土壤保持良好接触。以防止因接触不好影响读数的准确性。
表屏上显示的数据就是测得的管地电位。
读取数据，在测试记录上做好记录，注明该电位值的测试桩号及测试值。

管道阴极保护电位数值测量及杂散电流治理原则

管道阴极保护电位数值测量及杂散电流治理原则河南汇龙合金材料有限公司(1) 地表参比法该法是埋地金属构筑物的常规测量方法，该法的测试要点是将参比电极放在地下金属构筑物的顶部地面上，并确保参比电极和土壤电接触良好。

用从金属构筑物上引出地面的测试导线的参比电极引线同时接入高阻电压表，直接测取读数。

该法可用于测试桩处的定点测量，也可用于管道顶部的长距离闭路测量，测量所得的数据代表了正对参比电极处的管／地电位。

(2)近参比法为了更精确地测得管／地电位，尽可能的减少土壤电阻压降成分，可将参比电极尽量靠近被测管道表面。

此法的测量要点是把参比电极（通常用长效硫酸铜电极或测试探头）尽量靠近被测构筑物表面，如果被测表面带有良好的覆盖层，参比电极对应处应是覆盖层的露铁点，否则意义不大。

对于热油管道，采用近参比法时要注意管道的热地场对参比电极的不良影响，用辅助试片拉出一定距离，便可解决。

(3)滑动参比法此法主要用于大型储罐底板外壁阴极保护电位分布的测量。

对于新建储罐，一般可不用滑动参比法，而是在设计期间，在罐底中心及半径上每5～lOm布置一支参比电极（通常用长效硫酸铜电极或带填料的锌参比电极），如同近参比法，测知罐底板的电位分布。

对于已建储罐，滑动参比法可能是一种可行的方案。

杂散电流腐蚀也叫干扰腐蚀。

是指在工程实际中，从其它电源来的直流或交流电流，由于某种特殊的原因，流经被干扰管道，在电流流入的地方，金属结构不会发生腐蚀问题，但是在电流流出的地方（经常是漏点，电阻比较小的地方），由于是失去电子，金属会发生严重的腐蚀。

导致杂散电流腐蚀的电流源的形式很多，如电气化铁路、电解工厂的直流电源、交、直流高压输电系统的接地极、通信基站，相邻的阴极保护设施等。

油管接近高压输电线时，由于电磁耦合而在油管上感应交流电压，产生交流干扰，其危害在于高压输电线故障时产生瞬间危险电压，它既威胁人身安全，又可能击穿油管，或者在接触不良处产生电火而造成危害。

阴极极化曲线测定实验报告

阴极极化曲线测定实验报告实验目的本实验旨在通过阴极极化曲线测定的方法，研究金属在不同电位下的电化学行为，并探索阴极极化曲线在材料表征中的应用。

实验原理阴极极化曲线是一种描述金属在电解质溶液中的电化学行为的曲线。

通过在恒定电流下改变电位，可以得到一条曲线，称为阴极极化曲线。

该曲线通常包括三个区域：Tafel区、过渡区和析气区。

Tafel区是曲线的起点，对应着金属表面的电化学反应速率受到电势控制的过程。

在该区域，电流随电位的变化呈线性关系。

过渡区是在Tafel区和析气区之间的区域，此时电流密度增加，但电位变化较小。

析气区是曲线的终点，电流密度随电位的变化呈非线性关系，电位继续增加但电流密度不再增加。

阴极极化曲线可以提供有关金属电化学反应动力学和电极过程的信息。

通过分析曲线的斜率和形态，可以了解金属在特定电位下的电极反应速率、电子传递速率和电化学反应机制。

实验步骤1.准备实验材料：金属试样、电解质溶液、参比电极等。

2.清洗金属试样：使用去离子水和乙醇等溶剂，将金属试样表面的杂质彻底清洗干净。

3.准备电解质溶液：根据实验要求配制合适的电解质溶液，确保其浓度和pH值符合要求。

4.搭建实验电化学池：将准备好的电解质溶液倒入电化学池中，将金属试样和参比电极分别插入池中，并连接电位计和电流计等仪器设备。

5.开始实验：通过改变电位，记录不同电位下的电流密度，并根据测量数据绘制阴极极化曲线。

6.数据处理：根据阴极极化曲线的斜率和形态，分析金属试样在不同电位下的电化学行为，如电极反应速率、电子传递速率等。

7.结果分析：根据实验结果，对金属试样的电化学性能进行评估，并与理论预期进行比较和讨论。

实验结果与讨论根据测得的阴极极化曲线，我们可以得到金属试样在不同电位下的电流密度随电位的变化关系。

通过分析曲线的斜率和形态，我们可以得到以下结论： 1. 在Tafel区，金属试样表面的电化学反应速率受到电势控制，电流密度随电位的变化呈线性关系。

阴极保护电流在线检测注意事项_

河南汇龙合金材料有限公司刘珍阴极保护电流在线检测注意事项1管道内部清洁度阴极保护电流在线检测技术并非适用于任何管道。

作为直接测量工具，阴极保护电流在线检测器需要与管道内壁良好接触，以便能够测量阴极保护电流产生的小电压降。

由于原油管道定期清管，因此其影响检测器与管壁接触的问题较少。

而成品油管道通常输送规格产品，一般不存在碎片堆积物，因此，其清管频率明显小于原油管道。

只要成品油管道末端油品污染程度轻，就可以认为该成品油管道是“清洁”管道。

为了确保阴极保护电流在线检测成功进行，在进行成品油管道检测前，通常需要对其进行较高质量的管道清管。

目前，市面上已有用于成品油管道的简便和较低成本的清管器产品。

这些清管器产品在进行清管的同时，也能测量管道内壁的清洁度，并能确定阴极保护电流在线检测时，检测器与管内壁是否能够充分接触。

由同一条成品油管道在间隔1年时间内进行的两次阴极保护在线检测测得的电压降变化曲线可以看出，由于管壁没有充分清洁及电接使用阴极保护电流检测器定位电流源触不良，使得检测过程产生大量噪音，从而导致电压降变化曲线(上河南汇龙合金材料有限公司刘珍方)波动较大，而在进行两次清管之后，测得的电压降变化曲线(下方)明显平缓。

河南汇龙合金材料有限公司刘珍相比原油管道和成品油管道，对天然气管道进行阴极保护电流在线检测较为困难。

由于天然气管道内的氧化物和管壁上脱落的碎片不能像原油或成品油管道那样被油流带走，因此天然气管道的清管难度较大。

管壁清洁度不足导致天然气管道的内壁电接触不够充分，影响了测得的直流电数据的准确性，而管壁清洁度问题对交流电数据影响不大。

同时，由于阴极保护电流在线检测器质量轻且与管道内壁间摩擦力小，因此天然气管道的介质流速波动对检测数据的准确性影响不容忽视。

较新的管道内壁存在大量轧屑，使得其与检测器接触和电压降测量难度增大。

同时，较新的管道防腐层完好，因此需要的阴极保护电流较小。

由于旧管道阴极保护电流较高，因此可一定程度上忽略其管壁接触问题对检测结果的影响，但是对于较新的施加低阴极保护电流的管道，其内壁接触问题对检测结果的影响不容忽视。

电解槽阴阳极电流分布测量作业操作及技术要求

电解槽阴阳极电流分布测量作业操作及技术要求1.1测量工具：
数字表或万用表（带接线），测量叉，笔，记录表。

1.2 测量的方法与步骤：
a) 确认测量叉接好数字表或万用表；
b)双手执测量叉，使两根测量叉纵向排列；
c)平行接触水平母线下的30公分导杆表面；
d)待读数稳定后，记下阳极电流分布值。

1.3 注意事项：
a) 发生阳极效应时应停止测量；
b)当发现对地电压异常时应停止测量；
c)降电流时停止测量；
d)进行出铝、换阳极、抬母线时停止测量；
e)非数字式电表应采取屏蔽措施。

f)正确区别测量叉的正负极。

1.4 阴极电流分布测量作业
所用的工具：
阴极测量棒，数字表或万用表（带接线），笔，记录本。

1.4 测量步骤与方法：
a) 确认测量棒接好数字表或万用表；
b) 将正极插在阴极钢棒与阴极软带的焊接处；
c) 将负极插在阴极软带与阴极母线的焊接处；
d) 待数字表读数稳定时，记下读数，继续下一个点的测量。

1.5 注意事项：
a) 发生阳极效应时应停止测量；
b)当发现对地电压异常时应停止测量；
c)降电流时停止测量；
d)进行出铝、换阳极、抬母线时停止测量；
e)非数字式电表应采取屏蔽措施。

f)正确区别测量棒的正负极。

埋地管道阴极保护电流测量技术分析

埋地管道阴极保护电流测量技术分析摘要：为了解交流干扰管道阴极保护系统防护交流杂散电流腐蚀的有效性，建立了埋地钢质管道杂散电流干扰的试验装置，研究了阴极保护电流对试片交流腐蚀行为的影响。

随着外加直流电压的变化，利用数据记录仪监测了试片阴极保护断电电位、交流电流密度、直流电流密度等参数随时间变化情况。

在外加直流电流增大和减小的过程中，对试片造成的影响是不可逆的;增大外加直流电流，交流电流密度降低，扩散电阻增大;通过交直流电流密度比显示，不能仅通过增加阴极保护电流来降低交流干扰程度，需要采用交流排流方式来降低交流干扰的影响。

关键词：管道阴极保护；电流；测量引言随着经济的高速发展，高压输电线路和高速铁路在国内大范围建设，交流干扰影响随之而来，特别是对于埋地钢质管道，交流干扰会造成管道的交流腐蚀。

早期人们认为交流干扰造成的腐蚀轻微，但随着管道防腐层等级的不断提高，管道上产生的交流干扰电压增大，造成的交流腐蚀危害越来越受到了人们的重视。

在没有交流干扰的情况下，埋地管道的阴极保护系统能够阻止或减缓土壤环境的腐蚀，然而交流杂散电流造成埋地钢质管道的腐蚀问题更加复杂化。

据报道，欧洲、北美和我国曾发生过多起交流干扰腐蚀，虽然管道的保护电位符合传统的阴极保护准则要求，但是埋地钢质管道依然遭受交流干扰腐蚀的情况。

1基本情况概述某天然气公司的天然气利用工程高压管线项目于2016年12月投运，该高压管线在运行检查中发现部分阴极保护装置电位异常现象。

管线的基本情况如下：该高压管线总长约6500m，管道规格为Ф813×14.3mm，管道材料为L415M，设计压力为4.0MPa，设计温度为常温，设计介质为天然气，管道敷设方式为埋地，管道防腐层材料为3PE加强级，管道牺牲阳极系统采用镁合金牺牲阳极。

2试片法测量电位管道阴极保护电位有效性的评价，主要由断电电位负于850mV且不负于-1200mV判断，因此必须对管道的电位进行正确测量，否则会造成误判。

CDCN442 浓度导电性分析仪操作手册说明书

CDCN442Concentration Conductivity MeterCDCN442OmegaInstruction Manual Conductivity and Concentration AnalyzerCDCN442Index Specifications (3)Mechanical Description (4)Dimensional (5)Typical Installation (6)Electrical Installation (7)Interconnection Barr (8)Electrical Schematic (9)Equipment Operation (10)Equipment Operation - Concentration Set Up (14)Equipment Operation - Concentration Calibration (16)Equipment Operation - Concentration Read (17)Equipment Operation - Conductivity Set Up (18)Equipment Operation - Conductivity Calibration (20)Equipment Operation - Conductivity Read (21)Cell Maintenance (22)Communication Protocol (23)Troubleshooting (24)Cable InletCable kncokout 3/8” (4x)Weight1.3Kg.Electrical Power90 thru 240 Vac ( 50/60 Hz)Analyzer/TransmiterAnalogic 4 - 20 mA w/ adjustable output range. Digital RS-485 bilateral thru software up to 36Line Resistance 1KOhmControler Actuation TypeFrequency Modulation, P+DiACCESSORIES: supplied with the equipment : installation hardware (2x), Instruction Manual, SS Clamps with nuts and washers. SensorProcess Connection Threaded Point 2” (CIP and others upon request)R 485S125463This equipment is offered in SAE-323 aluminum with lower oxidation level, anti corrosion treatment and electrostatic epoxy paint finishing and frontal lid in ABS . Built in small and light size, complying with IP-68 Standard. Under the same case you will find: Local Indicator, Analyzer, Transmitter and Controller.The mounting of the instrument can be done on 2” Tube" or in Flat Surface or Panel (DIN144).The electrical connection is possible through a terminal block located internally at the lower portion of the case and the cable knockouts are located in the bottom of the case, 4x 3/8” BSP.1 - Frontal Lid in ABS.2 - Display alphanumeric 2 lines x 16 characters.3 - 3 keys Tactile Membrane Keyboard:= Select the desired operation, flashing option.= Enter the program commands for analysis, confirm above Selected Function. = Move back one step at every touch.4 - Cable knockouts (4) 3/8” BSP .5 - Aluminum Case (SAE-323)6 - Installation Hardware for Wall Mounting, 2” tube and panel.<SELECT><ENTER><ESCAPE>CDCN442Omega¢73Note: Dimensions in millimetersFlat Surface InstallationThe CDCN442 can be installed in 3 different ways: Panel, 2” Tube and Flat Surface.For installation purpose the instrument is offered with the following hardware: 2 Installation Support, 4 SS screws ¼" x ½", 4 plain SS washers ¼", 2 "U" SS clamps , 2 SS screws and 2 SS plain ¼".These hardware allow 3 different ways for installation, to know:a) Installation in 2” tube: Uses 2 installation support + 2 "U" clamps with nuts and washers.b) Installation in Panel: Uses 2 installation support ; the edges will be placed against the internal surface of the panel, 4 screws. ¼" x ½” will be used to hold it in place.c) Installation in Flat Surface(Wall Mount): Uses 2 installation support and “U” clamps holes are also used to Hold the instrument in place at flat surface.1.1. The electrical power of the equipment, must be independent from other system components. Being so,the cable that powers the Control Valves, Solenoids, Alarms and others, must be connected directly to the Distribution box and "never" at the connection barr of the equipment.1.2.Verify if thecable knockouts of the equipment and probes are firmly attached to its respective interconnection cables. This procedure is necessary in order to preserve the enclosure protection (IP-68).1.3.Be careful with Humidity !!. It diminishes the impedance, generating reading errors. Verify the cable knockouts and if necessary, dry the interconnection barr using a hair dryer.1.4.Never cut or mend the cell cables .1.5.ON-OFF outputs are thyristor type, offering many advantages for the equipment, such as : spark free,quicker commutation, noise practically zero, exempt of RF interference and many more. Outputs can commutate any charge, since they are powered by alternate tension (VAC), limited to 250V / 1A.1- Remove the equipment from the box and inspect for any possible damage caused by the transportation;2- Install the instrument in an area that offers easy access and handling, exempt of vibrations, following the installation procedures Topic 5 - Typical Installation - page 6;3- Avoid exposing the equipment to direct to solar rays and if necessary provide a covering;4- Verify if the electrical installation is correct, if security hardware is available (circuit breakers);5- Proceed with the equipment installation.1- Remove the front lid of the equipmentNever mend the Toroidal Cell cables! This may cause reading errors!Electrical installationImportant RecommendationsSlots1 & 234 & 56 , 7 & 89 & 1011 thru 16Connections Electrical Power 90-240Vac - 50/60 Hz Grounding Set Point 1Output (SP 1)Digital Rs485 Output Transmission Output 4 - 20mA Toroidal Cell Connection FusesF1F2ConnectionsGeneral Fuse (1A / 250V)Set Point 1 Fuse (1A / 250V)CDE-442 Cell Connection to the Inteconnection BarrThe CDE-442 cable cell offers terminal pin type, in order to be screwed in a connector Conexell Type 6 pins. For the connection, insert the cell cable and screw the terminals at the connector obeying the numerical sequence identified below.After connecting the cell at CN1 at the interconnection board, tie the cable knockout firmly.Colorless (14)RedRed(13)Black(15)Colorless Black(16)Blue (11)Colorless Blue (12)M A I N B O A R D C o n n e c t o r s D e s c r i p t i on F 2 = 1A / 250V (S P 1) F 1 = 1A / 250V (G E N E R A L )P o w r ea l e e m n c t o r n eG r o u n d i n gThe equipment is offered for many process element analysis. For this, equipment leaves factory with a pre-recorded memory with all elements listed below, allowing the user to select the desired element suitable for the desired application.For Conductivity application the offered range is from 5 through 2000 mS/cm. For Concentration, verifybelow table showing all elements and its respective ranges for selection. User can also select during Set UpOperation the Unit being used g/L or %.ElementRange2 41-While at Reading , it is possible to obtain the following information:When key is pressed, it is possible to obtain the Set Point and transmission values.If key is pressed the equipment will go to STAND BY. While in STAND BY the outputs will be turned off, that means, the Current Output will go to 4mA and the contact to NO (Normally Open). The outputs must be programmed by the user during Set Up Mode.2- key is recognized, only when pressed and held for about 5seconds. This time is necessary to certify the desire to exit this operation.3- When a power failure occurs, the equipment, when powered again, will return to prior conditions, the Outputs and the indication will follow the conditions prior to the power failure.4- During certain steps of the analysis program , it is allowed to adjust certain values, such as: Calibration,Reading Time, Set-Point, Hystereses, 4mA and 20mA values.<SELECT > <ENTER > <ESCAPE >Important InformationOperation ModeAs the equipment analysis program was developed obeying a standard structure, it is supplied as an example the Conductivity flow and also for Concentration for NaOH. For other elements, the only change would be the reading range.Read OperationSet Up OperationThe menus are self explanatory with its respective options, that are selected by pressing key. When the selected option flashes, press key to confirm the selected option.If a mistake is made, press key to go back (one step at every touch) and modify the option, except while during Reading Mode, when key needs to be held for about 5seconds in order to exit this mode.The equipment offers a non-volatil memory (E2PROM ), in order to store operations functions (resolution,reading, Calibration and more). Even when turned off from power, all functions chosen during set up will remain stored.Before starting any work with the equipment, it is recommended to to certify that you have chosen the correct options for the operation .When at the , press key in order to select the desired function, flashingoption, then press , press key until SET function flashes, then press . A Password will be requested, press in sequence ,, then follow step by step the options shown at the screen. In case the user desires to change the flashing option, press key until the desired option flashes then press In order to move to the next screen, user must press .<SEL><SEL> <SEL><SEL><SEL><ENT> <ESC><ESC><ESC> verify the SET UP parameters, FUNCTION SELECT SET UP menu key. In order to access the key to confirm the option chosen key to confirm the option.key <ENT> <ENT> <ENT><ENT> <ENT> At this operation user will have options to and . In case the desire is to , press key until . From this point on the program will guide the user step by step on how to proceed with the perfect calibration. In case the desire is to Read, press key until option key to confirm, then theDisplay show the following form:1- The "Prompt " is a signal that flashes every time a reading is performed, depending upon the time between readings, that can be selected during Set Up Mode.2- The measured value and the element unit.3- Sample Temperature.4 - Read Element.CALIBRATE READ CALIBRATE Cal Read the Sensor option flashes, then press key to confirm the option chosen flashes, then press <SEL> <SEL> <ENT> <ENT >1) The CDCN442 equipment software , offers self-explanatory menus interacting with the user. Thedialog between the Analysis Program and the user, is achieved thru a 2x6 alphanumeric display. The main menus and hidden options menus are displayed to the user. The hidden option menus, are displayed using arrows where one of them will flash and in order to access the hidden options, press <SELECT> key and to confirm the option chosen press <ENTER> key. Always use <SELECT> key in order to change the option at the menu, then use <ENTER> key to confirm the option chosen.Note: at this manual the hidden options are displayed on the side of the function, as shownbelow:alternate betwen options decrease (<) or increase () from the valuedisplayed, then confirm by pressing <ENTER> key.>Press <SELECT> key alter the value. When reached the desired value, press <ENTER> key accept the valueand move to next step.Note: at this manual the active Menus will be displayed in color.2) If a mistake or error happens and it is necessary to change data or to return to a previous screen, press <ESCAPE> key.Find below an example.Blue 3)In certain program steps, where value adjustments are offered, the symbols “<” (decrease) and “>” (increase), follow steps as shown below:24) The equipment stores the configuration on a non-voltile memory (EPROM). Even when turned off, the last working conditions will be sustained.Hidden option for Set Up & CalibrationAnalyzer CDCN442 V.1.0Read:NaOH 0-100g/L SELECTCalibration ->When powering the equipment, the display will show the model and software version then the aplication where the equipment was last being used at the process.Finally the Process Reading will be displyed.NaOH 25ºC -> 10.0 g/LThe Element chosen during Set Up.Ex. NaOH, range 0 thru 100 g/L.Press <ENTER> key to go to Stand By, press again to go back to Reading Mode...Press and hold <Escape> key in order to move back to the Main Menu where the arrows indicate hidden options Main MenuSELECT Read _>The read value obtained for NaOH from the sample, just after being powered (instantaneous read).Equipment Model and Software Version will be displayed.SELECT Read _>Press <SELECT> key, in order toaccess the Set Up or Calibration option (hidden options). Confirm the chosen option by pressing <ENTER> key.SELECIONE Setagem _>SELECTSet Up _>Select Set Up option, press <ENTER>key then follow the flow diagrham from item 9.1 on page 14.OrCocentration Set Up Menu : allows user to prepare the equipment for process concentration analysis, asdesired by the user.WAITConfigure R 485? _>Yes SELECT_>Portuguese Bits per Second _>9600Configure Analyzer?_>Yes Data Bits _>8FUNCTION _>Concentrat.Parity _>Even UNIT_> g/L work Number: 1 <>SELECTNaOH 0-15 g/L_>Configure 4-20mA? _>Yes CALIBRATION _>Manual Value 4mA0g/L <>Calibrate in? _>Concentrat.Thermostatize *********ºC<E>Calibration Pt.100g/L <>New Cell?_>No WAITConfigure Output:_>Yes >>>>>>>>>>>>>>StabilizingReading Mode _>Continuous Ready?Time bwetween Read 1s. <>Adjust : 4mA <Sel> - <Esc> +Config. Transmis.?_>Yes Adjust : 20mA <Sel> - <Esc> +Hidden Option 12002400480019200Press<ENTER>to continueHidden Options English or Spanish Value 20mA 150g/L <>Burnout 4-20mA 20mA _>Adjust 4-20mA ? _>Yes Place Ampmeter @ 4-20mA OutputHidden Option NoThermostatize *********ºC<>Adjust values.See page 12SELECTSet Up _>Hidden Option Using the arrows < or > to adjust Calibration Point..Confirm pressing <ENTER> key. See page 12.Hidden OptionOddCGo to Page 15SConfigureControl?_>Yes Control On-Off _>Set-Point 100g/L <>WAIT ................Hystereses 0g/L <>Burnout ControlOpen _>Go to page 14Acting Direct _>DSELECT _>C a libr a tion Place Cell @100g/LNaOH Ready?CALIBRATINGVerify Standard<ENTER>Verify the Standard conditions being used!If good, press <ENTER>Attention Verify Cell Verify Cell physicaland function conditions.SELECT_>Read If during Set Up Manual Calibration was chosen, Press <Select> key in order to adjust the value read..Read ValueConductivity Value will be displayed18.50 mA10.0 g/L <>Press<SELECT> keyNaOH 25ºC -> 10.0 g/L25ºC -> 908.1 mS /cmCurrent Value refering to read will be displayed. Press<SELECT> keyPress<SELECT> keyNOTE : during read Mode, pressing and holding <ESCAPE> key will instruct the program analysis to exit the mode, moving back to the Main Menu. This action will not halt the Reading Operation while user performs another operation, reading will still be performed by the instrument. If user desires to halt Reading Operation, first place the instrument in Stand-By pressing<ENTER> key, then press and hold <ESCAPE> key to exit reading and access other program area.WAIT...............Configure RS485?_>Yes SELECT_>Portuguese Bits per Second_>9600Configure Analyser?_>Yes Data Bits _>8FUNCTION _>Conductivity RANGE5 - 2000 mS /Cm work Number: 1 <>RESOLUTION0.1 _>Configure 4 - 20mA?_>Yes CALIBRATION _>Manual Value 4mA10.0mS /cm <>Thermostatize Cell:25.0ºC<E>Calibration Pt. 111.9 mS /cm <>New Cell? _>No WAITConfigure Display:_>Yes >>>>>>>>>>>>>>StabilizingReading Mode _>Continuous Reading Time1s <>Adjust : 4mA <Sel> - <Esc> +Configure Transmis.?_>Yes Adjust : 20mA <Sel> - <Esc> +Press <ENTER>Value 20mA 10.0mS /cm <>Burnout 4 - 20mA 20mA _>Adjust 4 - 20mA ? >Yes _Place Ampmeter @ Output 4-20mAThermostatize Cell:25.0ºC<>SELECTSet Up _>ACReady?Conductivity Set Up Menu : allows user to prepare the equipment for process conductivity analysis, asdesired by the user.Hidden Options English or Spanish Hidden Option < or > to adjust Calibration Point..Confirm pressing <ENTER> key.See page 12.Adjust value.See page 12Hidden Option NoHidden Option Parity _>Even Hidden OptionOddGo to Page 19ConfigureControl?_>Yes Control On-Off _>Set-Point 10.0 mS /cm <>WAIT ................Hystereses 0.0 mS/cm <>Burnout ControlOpen _>Go to page 18Acting Direct _>DSELECT _>C a libr a tion Place Cell @ 111.9 mS/cmReady?CALIBRATING Verify Standard <ENTER>Verify the Standard conditions being used!If good, press <ENTER>Attention Verify CellVerify Cell physical and function conditions.SELECT _>Read If during Set Up Manual Calibration was chosen,Press <Select> key in order to adjust the valueread..Read Value 18.50 mA 908.1 mS/cm <> Press<SELECT> keyCurrent Value refering to read will be displayed.Press<SELECT> keyNOTE: during read Mode, pressing and holding <ESCAPE> key will instruct the program analysis to exit the mode, moving back to the Main MenuIf <ENTER> key is pressed, the equipment will go to Stand -by Mode.25ºC -> 908.1 mS/cm NOTE : during read Mode, pressing and holding <ESCAPE> key will instruct the program analysis to exit the mode, moving back to the Main Menu. This action will not halt the Reading Operation while user performs another operation, reading will still be performed by the instrument. If user desires to halt Reading Operation, first place the instrument in Stand-By pressing <ENTER> key, then press and hold <ESCAPE> key to exit reading and access other program area.It is recommended a visual inspection of the cell periodically and if noticed the cell is dirty, please wash it using neutral detergent and wash it throughly.After the cleaning please proceed with the cell calibration.1) Proprietary:Order:ESC ID P CR LF0x1B 0x50 0x0D 0x0A HexadecimalThe ID is configured at the instrument from 1 to 32.Answer:L > > V V V V V V mS C C C C C C m AExample of answer for an un-stable valueL > 20 mS 1 2 . 0 0 m AExample of answer for a stable valueL > > 20 mS 1 2 . 0 0 m ANote: a) When the answer comes a C instead of a L, it means that the equipment is under calibration function (is being operated in location by the user, executing the calibration operation at the instrument).b) When the answer comes an S instead of a L, it means that the equipment is under Set Up function and it is being operated in location by the user.2) RS485 – It is a “physical location”, where the proprietary protocol will be “transported”. As factory default, this communication comes configured as:Speed = 9600Parity = noneNumber of Bits = 8Stop Bit = 1ID = 1M-4516/0209。