Woodward 5437-672模块备件

Woodward 5437-672

笔记在继续之前，确保所有开关
在电子装置的右侧设置为OFF–
见图2.3。
a） 确保所有外部电气和管道连接
已正确制作。
b） 用钠钙晶体填充防护管（自指示）。
防护管夹在外壳背面，并
通气管穿过密封圈孔，然后到达
标准溶液瓶。
c） 填充试剂瓶和标准溶液瓶并连接
显示器上的按钮。（详见第8.1节）
解决方案。）
d） 按照中的说明组装和安装探头
第8.2.5节和第8.1.6节。
e） 连接电源并打开。
笔记温度控制块多需要半小时
达到正常控制温度的时间。在此期间
这次是临时工。显示屏上显示“控制错误”。任何
在此期间，微处理器会阻止校准
时间
f） 验证是否有足够的样品供应给供应商
监视器是一个恒定的主机。
g） 将泵压板安装到蠕动泵上（请参见第节
8.2.7）并在开关位于泵侧的情况下打开泵
监视器。注意蠕动泵旋转，并检查
该样本和试剂由以下人员吸入监测器：
观察容器中存在的任何小气泡的进展
入口管。
h） 运行监视器至少一个小时，以确定温度
为了稳定，将溶液泵入系统
清除管道中的空气。检查周围是否有泄漏
检查管道连接，必要时进行矫正。
i） 如果监视器表现出良好的稳定性，即±2%的读数，则进位
进行校准–请参阅编程页。
j） 检查样品过滤器的状况，如有必要，请更换
必需的采取以下措施确保新滤清器安装正确：
注意过滤器主体上指示的流动方向。
4.1操作原则
无论是碳酸氢根离子含量还是总二氧化碳含量都不会降低
可以在未处理的样品中直接测量
只能对游离二氧化碳气体作出反应。碳酸氢盐
因此，离子必须通过化学反应转化为游离二氧化碳
调整样品溶液的pH值至小于
3.4.这是通过将硫酸溶液添加到溶液中实现的
在样品被提供给探针之前。
8237监视器中的气体传感探头包含一块玻璃
pH电极，其pH敏感玻璃膜形成
略微凸出的和坚固耐用的长寿命参比电极。
将两个电极组合成单个组件
作为pH测量对通过内部电极连接
含有碳酸氢根离子的填充溶液的贮存器。
填充溶液为0.05M碳酸氢钠，饱和
氯化钠，并用蒸馏器从样品中分离
气体渗透疏水膜，安装在膜的顶端
探查使样品流过探针膜，
因此
膜两侧的两种溶液平衡，
通过膜传递气体。

Woodward 5437-672

Woodward 5437-672

Note. Before proceeding any further, ensure that all switches are set to OFF on the right hand side of the electronics unit – see Fig. 2.3. a) Ensure that all external electrical and plumbing connections have been made correctly. b) Fill the guard tubes with soda lime crystals (self-indicating). The guard tubes clip onto the rear face of the enclosure and breather tubes pass through grommeted holes and then to the standard solution bottles. c) Fill reagent and standard solution bottles and connect them the the monitor. (See Section 8.1 for details of these solutions.) d) Assemble and fit the probe according to the instructions in Sections 8.2.5 and 8.2.6. e) Connect the electrical supply and switch on. Note. The temperature controlled block requires up to half an hour to reach the normal control temperature. During this time, 'Temp. Control Error' is indicated on the display. Any calibrations are prevented by the microprocessor during this time. f) Verify that there is an adequate supply of sample to the monitor constant head unit. g) Fit the pump platen on the peristaltic pumps (see Section 8.2.7) and switch the pumps on with the switch on the side of the monitor. Note that the peristaltic pumps rotate, and check that sample and reagents are being drawn into the monitor by observing the progress of any small bubbles present in the inlet tubes. h) Run the monitor for at least one hour to allow the temperature to stabilize, solutions to be pumped into the system and to purge the air from the pipework. Check for any leaks around the pipe connections and rectify as necessary. i) If the monitor exhibits good stability, i.e. ±2% of reading, carry out a calibration – see Programming Page. j) Check the condition of the sample filter and replace it if necessary. Ensure that new filters are fitted correctly by taking note of the flow directions indicated on the filter bodies. 4.1 Principle of Operation Neither bicarbonate ion content nor total carbon dioxide can be measured directly in an untreated sample, since the probe can respond only to free carbon dioxide gas. The bicarbonate ions must therefore be converted to free carbon dioxide by adjusting the pH of the sample solution to a value less than 3.4. This is effected by addition of a sulphuric acid solution to the sample before it is presented to the probe. The gas sensing probe in the 8237 Monitor contains a glass pH electrode whose pH sensitive glass membrane forms a slightly convex tip and a robust long-life reference electrode. The two electrodes are combined into a single assembly and are connected as a pH measuring pair through an internal reservoir of filling solution containing bicarbonate ions. The filling solution is 0.05M sodium bicarbonate saturated with sodium chloride and is separated from the sample by a gas-permeable hydrophobic membrane fitted in the tip of the probe. Sample is caused to flow past the probe membrane, whereupon the partial pressures of carbon dioxide gas in the two solutions on either side of the membrane equilibrate, transferring gas across the membrane.