老外学仪表-10 如何校准电导率传感器

Conductivity Electrodes must be calibratedwith the instrument the very first time

第一次使用电导电极测量时，

You will use it to take a measurement.

必须将其与仪表进行校准

They should also be recalibrated when yoususpect the sensor may be out of calibration

如果怀疑传感器不准，应该再次校准

Or on a periodic basis to verify that your calibrationremains accurate.

定期也要校准，确保精度

I'm Joey aqua from sensor X join me as welearn how to calibrate a conductivity sensor.

我是sensor X 的Joey Aqua，我们来一起学习怎样校准电导率传感器吧

To calibrate, connect your conductivity sensorto the instrument.

校准时，连接电导感器与仪表

If you have temperature sensor leads,connect these to the instrument as well.

如果有温度传感器引线，也要把他们与仪表相连

Follow the user instructions for connectingthe wire leads

遵循用户接线说明，

And calibration of the sensor in the ownermanual of your instrument.

和用户仪表手册中传感器校准说明

Most instruments will require that you selectthe range of measurement.

大部分仪表会对测量范围有要求

Use the setup menu as shown in the userinstructions.

使用用户说明中的设置菜单

To calibrate, you’ll need one or twoconductivity calibration standards.

校准时，需要1到2个电导率校准标准液

Sensor X offers a wide range ofconductivity solutions that are traceable to NIST standards.

Sensor X有多种依照NIST标准的导电率溶液

Most industrial users will select a mixed-allstandard.

大部分工业用户会选用混合标准液

These mixed-all standards are designed toclosely resemble real water samples

这些混合标准液经过专门设计，与现实中

that you are likely to encounter in thefield.

常见的真实水样十分相似

They will allow you to convert Micro Siemenconductivity units

能将μs电导率单位转化为

to parts per million of salt with reasonablecertainty.

具有一定稳定性的ppm盐溶液

For best results, select the conductivitystandard solution

为了实现最佳结果，要选择

that is close to the sample value youexpect to measure.

与期望的样本值接近的导电率标准溶液

If you'll measure over a large range,

如果量程较大

select a standard that's about 65 percentof your full-scale range.

则要选择浓度约为量程65%的标准液

For our example today, we will perform asingle point calibration.

在今天的示范中，我们将使用单点校准

Place the conductivity sensor into acontainer of clean rinse water.

将电导率传感器放入盛有清洁自来水的容器中

Use the ionized water or distilled water ifit's available for critical applications.

要是应用较为重要，就用离子水或蒸馏水

Remove the sensor from the rinse water and

将传感器从自来水里取出

rinse it with the small amount of theconductivity standard for best results.

用少量电导率标准液冲洗，让结果更加精确

Place the sensor into a beaker of the conductivitystandard solution.

将传感器放入盛有电导率标准液的烧杯中

Today i'll be using a solution of 731 MicroSiemens

我今天用的是731μs溶液

This is a mixed salt solution and it has500 parts per million total dissolved solids

这种混合盐溶液所溶解固体为500ppm

I'm swimming the sensor around the beaker

我在烧杯中移动传感器

to remove and trained air bubbles andensure a proper and stable reading.

赶走气泡，确保度数精确而稳定

We have to wait a minute or two for the readingto stabilize, okay.

等待一两分钟，让读数稳定下来

Most users will be using automatictemperature compensation during conductivity measurement

测量电导率时，大多数用户会使用自动温度补偿

to verify that the temperature reading ofyour sample by using a thermometer in the test beaker.

用温度计测量烧杯中的温度，验证样本温度读数

I've already tested the temperature ofthese beakers and

我已经测量了这些烧杯内的温度

my accuracy of temperature is well within 1degree Celsius.

温度误差在1℃内

If you're more than about 2 degrees Celsius,

要是超过2℃，

you'll want to perform temperature recalibrationas described in your user's manual.

就要按照用户手册重新校准温度

If you do not use automatic temperaturecompensation,

要是没有使用自动温度补偿，

you should select the manual temperature compensationmode from the setup menu in your instrument

则需在仪表设置菜单中选择手动温度补偿模式

and put the actual temperature you areusing in the calibration standard.

输入校准溶液中的实际温度

To perform the conductivity calibration, wepress the calibration key to enter calibration mode.

校准电导率时，按下校准按钮，进入校准模式

The display will flash for a minute untilit stabilizes.

显示屏会闪烁1分钟，然后稳定下来

Use the arrow up and down if necessary

如有必要，使用上下箭头

to confirm the calibration value and returnto the measurement mode.

确认校准值，然后返回至测量模式

It's a good idea to check your calibrationusing a second conductivity standard.

最好另取一杯电导率标准液核对你的校准值

In today's example, I have selected asecond standard

在今天的示例中，我还准备了另一杯标准液

that has a conductivity of about twice my calibrationstandard.

它的电导率约为校准标准液的2倍

I'll be going from 731 Micro Semen into astandard that has a conductivity of 1417 Micro Siemens.

电导率从731μs变成1417 μs

The 1417 micro semen solution has a totaldissolved solids of a thousand parts per million.

1417μs的溶液所溶固体为1000 ppm

Again，stirring the solutionto provide stable readings.

再次搅拌溶液，直到测量数据稳定

Ok, my meter has stabilized by reading fourteenhundred and nineteen micro Siemens.

读数为1419 μs

The standard that dates in is readingfourteen seventeen.

这个标准液的电导率是1417 μs

So it has very excellent agreements.

因此，二者十分相近

Visit sesorx.COM for more information aboutthe interesting products and accessories offered by sensor x.

要想了解有关Sensor X产品和配件的更多信息，请访问sesorx.com

Complete product instructions for allsensors may be found in the support section.

您可在支持部分找到所有传感器的说明

They will show you how to properly calibrate,effectively clean

这些说明演示了怎样正确校准、有效清洗

and the right way to use your sensors toobtain reliable, accurate and repeatable ratings.

和正确使用传感器，从而获得可靠精确、误差较小的测量值

Thank you for joining me today for this briefpresentation

感谢大家观看今天的简介

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编辑：门墩

翻译：苟进昌

后期：王天泽