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美国NDT James  C-CL-3000 Chlorimeter混凝土氯离子含量测定仪

The Chlorimeter Chloride Test System

A field kit for the determination of chloride ion content in concrete, fresh cement, masonry, most other construction materials, and water.

Applications

Service life prediction

Corrosion analysis

Features & Benefits

Fast - Results within minutes at the site.

Economical - Low cost per sample compared to laboratory testing.

Accurate - Results are comparable to laboratory testing.

Covers wide range from 0.002% to 2% chloride by weight

Internal Memory to store readings for later upload to a PC  via USB.

Digital display for direct reading of percentage of chloride by weight.

Conforms to AASHTO-T- 260.

Menu in English and Spanish.

The Chlorimeter produces results on-site, within minutes that are accurate and comparable to expensive laboratory tests. It measures the electrochemical reaction of a weighted sample placed in an extraction liquid. It automatically shows a temperature compensated reading of percent of chlorides on its digital display. A wide range - from 0.002 to 2% chloride by weight - is covered.

Technical

The determination of the chloride ion concentration in concrete is essential in assessing the need for maintenance on, for example, bridge decks and parking structures. The test can also be used to ensure that materials used in new construction are free from potentially harmful chloride ion levels.

With this method, the concentration of acid soluble chlorides is measured. In most cases, this is equivalent to total chloride concentration.

A sample of powder is obtained by drilling and careful quartering. Then an accuray weighed 3 gr. (0.1 oz) sample is dissolved in 20 ml (0.67 fl. oz.) of extraction liquid which consists of a precise, measured concentration of acid. For sampling wet concrete a 3 gr. (0.1 oz.) sample of mortar (i.e. without coarse aggregate) is used.  Typically for concrete, samples that are to be analyzed for chloride are obtained at various depths, thereby supplying the engineer with a chloride ion profile.

The chloride ions react with the acid of the extraction liquid in an electrochemical reaction. An electrode, with integral temperature sensor, is inserted into the liquid and the electrochemical reaction measured.

A uniquely designed instrument converts the voltage generated by the chloride concentration and sensor into a reading for the user. The instrument automatically applies the temperature correction and it shows the chloride concentration on a LCD display percentage by weight.  The unit uses 4 'AA' batteries for power.  The Chlorimeter can also store test results and upload them to PC via USB.

Once the sample is obtained, test results can be determined and read in less than five minutes.  These initial values give a valuable indicator of the current chloride concentration values.  Accurate results are typically obtained after the sample has been in the extraction liquid for 24 hours.

To avoid contamination, the electrode should be thoroughly washed with de-ionized water after each test.

Replacement packs, containing twelve bottles of extraction liquid, each for one time use, are available. Five calibration liquids each with known concentrations are supplied with each pack.  Bulk packs of one hundred extraction liquids are also available for larger testing jobs.

Thecalibration liquids are used to establish the calibration curve, and to check that the system is functioning correctly. Calibration is not required for each use. The calibration liquids are colored to avoid confusion between them and with the extraction liquid.

All equipment necessary to complete the chloride test is supplied in a standard size carrying case.

Components

美国NDT James  C-CL-2000 Chlorimeter混凝土氯离子含量测定仪

这是一个能装在手提箱内的测量混凝土内含氯量的试验室。

特 性 :

『 在工地现场，能在几分钟内快速测得混凝土的含氯量。

『 与试验室分析相比，费用低廉。

『 与试验室试验相比，结果准确。

『 环境温度变化时，仪器具有自动补偿功能。

『 含氯量以百分比和 ppm 表示，可直接读数。

工作原理 :

『 混凝土内含氯量十分重要，桥面及停车场等混凝土内的含氯量的评估尤为关键，因为这直接关系到确定该构筑物是否需要维护及确定其维护范围的大小。混凝土内增添新材料时也能对其含氯量进行分析，从而避免混凝土结构受到过高含氯量的损害。

用这种方法可以测出混凝土内酸溶性氯化物的含量，其单位为重量百分比和 ppm 浓度。在大多数情况下，上述数值与总含氯量是相当的。『 在混凝土构筑物上，用钻孔法取样，将钻出的 3 克混凝土粉溶入 20 毫升的酸性萃取液内，萃取液的浓度是经过精确标定的。混凝土中的氯离子与萃取液中的酸发生电化学反应。

『 将一个带温度传感器的电极，插入上述萃取液中，对电化学反应进行测量，经特殊设计的仪器能把氯化物反应所产生的电压经温度修正后转换为含氯量的浓度，直接在液晶显示器上显示。

『 一旦获取混凝土粉样品，用该仪器在几分钟之内即可得到准确结果。

『 为避免污物影响测量精度，每次测试前应用蒸馏水对电极加以*清洗。

『 仪器带有一盒萃取液，内装 12 瓶，每次测试用一瓶。盒内还有两瓶校准液，每瓶校准液的浓度已预先标定，其用途是使操作者能校准仪器的精度。为避免在使用中发生混淆，校准液有两种颜色，一瓶是红色的，一瓶是蓝色的。

『 所有与含氯量有关的东西都装在一个手提箱内，携带十分方便。

C-CL-2000 混凝土含氯量测定仪由下述部分组成：

C-CL-3700 带有温度补偿传感器的氯化物测量电极

C-CL-2020 由电池供电用来直接显示氯的百分含量的带有温度补偿电路和微处理器的高阻抗读数器

C-CL-2012 备件盒。内有塑料瓶装萃取液 12 瓶，每瓶 20ml ，盒内还有 5 瓶有颜色的校准液

C-CL-1030 电极浸润剂瓶

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