绝缘油(变压器油)中水分含量检测方案

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Kyoto Electronics Manufacturing Co.， Ltd.Data No.LN47-07348 No.EKCA-07379 KEM Application Note No.EKCA-07379 Coulometric Karl-Fischer Titration Moisture of electric insulating oil Summary- Checked the possibility of measuring moisture of electric insulating oil with MKC-520， andgood repeatability was obtained. -Measuring instrument- Main unit：MKC-520 Coulometric KF moisture titrator Electrode： M-713 Twin platinum electrode #433-0006 Inner burette -Reagent- Anolyte： Coulomat AG Catholyte： Coulomat CG -Measurement method- Preparation： (1) Fill the titration cell with the anolyte and the inner burette with the catholyte.(2) Pretitrate for dehydration. Measurement： (1) Place 10g sample in the titration cell and start the measurement. -Equation- Moisture (ppm)： ((Data-Driftxt-Blank)/(Wt1-Wt2))xF Data ： Measured water content (ug) Drift ： Drift before measurement (ug/s) t ： Measuring time(s)Blank ： Blank value (ug) Wt1 ： Tare including sample weight (g) Wt2： Tare including residual weight (g) F：Factor(1.00) Standard method- Karl Fischer method -Ambient conditions- Temperature： 23 °℃ R. Humidity： 67% Weather： Rain -Measurement parameter- -Printout data- 「Titration] Method 1 t(stir) 60s t(wait) 15 s t(max) 0s Drift Stop ： Rel 0.1 ug/s Cont. Gain 5.0 Stable 0.1 ug/min Start ：Manual Oven ：Off [Calculation门 Clac. No. 2 Unit ：ppm Weight ：\Variable Drift Comp. ： Auto 「Data Listl Samp. Interval 30 s Display ：Off Print Meas. Data ：Off Print Graphic ：Off Method 1 Calc. No. 2 ***Result*** Sample No. 04-01 Date 2007/10/1415：16 Wt1 Wt2 Titr. Cell No. 110.3400g Net 10.3482 Drift ug/s Result 0.05117.3ug11.335ppm Titr. Time ： 00：00： 59 ***Result*** Sample No. 04-02 Date 2007/10/1415：24 Wt1 Titr. Cell No. 112.1365g Wt2 0g Net 12.1365g Drift 0.07uig/sResult 154.7ug 12.747 ppm Titr. Time ： 00：00：34 ***Result*** Sample No. 04-03 Date 2007/10/1415：32 Wt1 Titr. Cell No. 110.9261 g Wt2 g Net Drift 010.92610.07ug/s Result 142.6ug 13.051ppm Titr. Time ： 00：00： 49 -Measurement results- Run Sample size(g) Moisture(ug) Concentration(ppm) Statistics 123 10.348212.1365 10.9261 117.3154.7 142.6 11.335 12.747 13.051 MeanSD RSD 12.378 ppm0.9157 ppm7.3978% -Comments- Set t(stir) (the time for extracting solvent) before measurement when the sample is hard todissolve in the dehydrating solvent. Http：//www. shxf17. com 上海旭风科学仪器有限公司 上海市闸北区荣路 el： Fax： 周峰 zhou-fengcom