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海揚詞說--使用TDS測試有哪些注意事項？

 

                        海揚磁水HYC設備部  

                      楊淑蘭18660695488

 

（一）測量時的水溫應維持在攝氏25度左右，溫度過高會使TDS值增加，影響正確性。

（二）液晶屏幕所顯示的數值即為TDS值，若TDS計顯示數字愈高，表示水中的物質愈多。

（三）一般地區磁化過的自來水平均在250ppm左右，如果是純水系統能減至30ppm以下，當純水的數值超過30ppm時，就必須考慮更換RO濾膜或請技術人員驗修。

（一）TDS僅能測出水中的可導電物質，但無法測出細菌、病毒等物質。

（二）單獨依賴TDS水質測試來判斷水質是否能生飲，并不是較正確的作法;經高溫無法滅絕的細菌或病毒，必須透過更精密的儀器才能測出來。

⑴毫克（mg）/升表明1升水中有多少毫克溶解性總固體。

⑵PPM溶液百萬分率濃度單位。指100萬毫升溶液中含有溶質的毫升數或表明100萬克溶液中含有溶質克數。

⑶換算關系：1mg/l=1PPM

（4）它和電導率往往存在一種相通的關系，有時候TDS也可以用來表示電導率，兩者的關系：1TDS=2μS

其中μS為電導率的單位。

國家標準GB5749-2006《生活飲用水衛生標準》中對飲用自來水的溶解性總固體

影響TDS值測試的因素：（TDS）有限量要求：溶解性總固體≤1000mg/L

水溫：TDS筆不可用于測量高溫水體（例如：熱開水）

水的流速：TDS筆不能用于測量晃動較大的水體

水質污染：TDS筆不能用于測量污染濃度較高的水體

海揚磁商務部  0536-8970809