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海扬词说--使用TDS测试有哪些注意事项?
发布时间: 2021-5-14 | 来源:潍坊海扬磁水处理设备有限公司 |  本文被阅读 0 次
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(一)测量时的水温应维持在摄氏25度左右,温度过高会使TDS值增加,影响正确性。

(二)液晶屏幕所显示的数值即为TDS值,若TDS计显示数字愈高,表示水中的物质愈多。

(三)一般地区磁化过的自来水平均在250ppm左右,如果是纯水系统能减至30ppm以下,当纯水的数值超过30ppm时,就必须考虑更换RO滤膜或请技术人员验修。

(一)TDS仅能测出水中的可导电物质,但无法测出细菌、病毒等物质。

(二)单独依赖TDS水质测试来判断水质是否能生饮,并不是特别正确的作法;经高温无法灭绝的细菌或病毒,必须透过更精密的仪器才能测出来。

毫克(mg/升表明1升水中有多少毫克溶解性总固体。

⑵PPM溶液百万分率浓度单位。指100万毫升溶液中含有溶质的毫升数或表明100万克溶液中含有溶质克数。

换算关系:1mg/l=1PPM

4)它和电导率往往存在一种相通的关系,有时候TDS也可以用来表示电导率,两者的关系:1TDS=2μS

其中μS为电导率的单位。

国家标准GB5749-2006生活饮用水卫生标准》中对饮用自来水的溶解性总固体

影响TDS值测试的因素:(TDS)有限量要求:溶解性总固体≤1000mg/L

水温:TDS笔不可用于测量高温水体(例如:热开水)

水的流速:TDS笔不能用于测量晃动较大的水体

水质污染:TDS笔不能用于测量污染浓度较高的水体

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