METTLER TOLEDO PH meter composite electrode pH FE20 FE28 probe LE438 laboratory | Инструменты

METTLER TOLEDO PH meter composite electrode pH FE20 FE28 probe LE438 laboratory | Инструменты

LE438 series of composite PH electrode, built-in NTC temperature sensor Device, Automatic temperature compensation for accurate measurement PH value of the solution. model LE438 / LE438 IP67 Built-in temperature sensor NTC PH range pH0 ~ 14 temperature range 0 ~ 800   Operating Guide 1. Open the package, carefully check the PH-sensitive membrane, liquid network Ministry and NTC, if damaged please keep the original packaging and hair ticket. Contact the supplier as soon as possible. Show, 2. Remove the moisturizing cap, wash the pH sensitive membrane with distilled water, Liquid junction and electrode rod, and then gently wipe with a tissue Dry, do not rub PH sensitive film to prevent static film Response time of the ringing electrode. 3. Observe the vertical electrode sensitive membrane bubble, such as There are bubbles, you can use the rejection of the thermometer swinging electricity Very, to rule out bubbles. 4. Connect the BNC and NTC connectors of the electrode cable (as shown in the figure) Show) were connected to the PH meter corresponding interface. 5. Calibration and measurement procedures, refer to the corresponding PH meter manual On the detailed steps. The electrode must be used before measuring Into the calibration. 6. After the measurement, the electrode must be cleaned and will hold One-third of 3mol / L KCl solution moisturizing cap sleeve back To the electrode's head. Do not store the electrode in distillation Water. Common problems and troubleshooting A. Slow response / drift Wash the lumen with warm water. If the electrode dry for a long time Before use should be immersed in 3 mol / L KCI solution put, 24 hours or more. B. Slope adjustment is not in place Wash the electrode with lukewarm water with anhydrous ethanol Wipe the cable connector. C. When the electrode is contaminated with oil / organic liquids, use C Hole or ethanol wash electrode. note: Do not use strong acids (such as concentrated hydrochloric acid) to clean the electricity pole, Otherwise it will shorten the life of the electrode, the electrode in each After cleaning, you must recalibrate. Applicable samples Conventional aqueous solutions such as waste water, (water-based) emulsions, (water-based) Suspension, (water-based) paint and other samples, but also for water Aquarium and swimming pool PH measurement.