User manual HANNA INSTRUMENTS HI 83216

[. . . ] Instruction Manual HI 83216 Multiparameter Bench Photometer for Pool & Spa Applications www. hannainst. com 1 Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Then, keeping the syringe in vertical position above the cuvette, push the plunger down into the syringe until the lower edge of the seal is exactly on the 0. 5 mL mark. Now the exact amount of 0. 5 mL has been added to the cuvette, even if the tip still contains some solution. USING LIQUID AND POWDER REAGENTS · Proper use of the dropper: (a) for reproducible results, tap the dropper on the table for several times and wipe the outside of the dropper tip with a cloth. (b) always keep the dropper bottle in a vertical position while dosing the reagent. · Proper use of the powder reagent packet: (a) (a) use scissors to open the powder packet; (b) push the edges of the packet to form a spout; (c) pour out the content of the packet. (b) 12 USING CUVETTES · Proper mixing is very important for reproducibility of the measurements. The right way of mixing a cuvette is specified for each method in the related chapter. (a) invert the cuvette a couple of times or for a specified time: hold the cuvette in the vertical position. Turn the cuvette upside-down and wait for all of the solution to flow to the cap end, then return the cuvette to the upright vertical position and wait for all of the solution to flow to the cuvette bottom. The correct speed for this mixing technique is 10-15 complete inversions in 30 seconds. This mixing technique is indicated with "invert to mix" and the following icon: (b) shaking the cuvette, moving the cuvette up and down. This mixing method is indicated with "shake gently" or "shake vigorously", and one of the following icons: shake gently shake vigorously · Pay attention to push the cuvette completely down in the holder and to align the white point on the cap to the indexing mark on the meter. 13 · In order to avoid reagent leaking and to obtain more accurate measurements, close the cuvette first with the supplied HDPE plastic stopper and then the black cap. · Each time the cuvette is used, the cap must be tightened to the same degree. · Whenever the cuvette is placed into the measurement cell, it must be dry outside, and free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. · Shaking the cuvette can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. · Do not let the reacted sample stand too long after reagent is added. For best accuracy, respect the timings described in each specific method. · It is possible to take multiple readings in a row, but it is recommended to take a new zero reading for each sample and to use the same cuvette for zeroing and measurement when possible (for most precise results follow the measurement procedures carefully). · Discard the sample immediately after the reading is taken, or the glass might become permanently stained. · All the reaction times reported in this manual are at 25 °C (77 °F). In general, the reaction time should be increased for temperatures lower than 20 °C (68 °F), and decreased for temperatures higher than 25 °C (77 °F). INTERFERENCES · In the method measurement section the most common interferences that may be present in an average wastewater matrix have been reported. It may be that for a particular treatment process other compounds do interfere with the method of analysis. HEALTH & SAFETY · The chemicals contained in the reagent kits may be hazardous if improperly handled. · Read the Material Safety Data Sheet (MSDS) before performing tests. · Safety equipment: Wear suitable eye protection and clothing when required, and follow instructions carefully. [. . . ] The reaction with the reagent causes a yellow to red tint in the sample. Description Phenol Red Indicator Quantity 5 drops REQUIRED REAGENTS Code HI 93710-0 REAGENT SETS HI 93710-01 Reagents for 100 pH tests HI 93710-03 Reagents for 300 pH tests For other accessories see page 34. MEASUREMENT PROCEDURE · Select the pH method using the procedure described in the Method Selection section (see page 15). · Fill the cuvette with 10 mL of unreacted sample (up to the mark) and replace the cap. 10 mL · Place the cuvette into the holder and close the lid. · Press the Zero key. The display will show "-0. 0-" when the meter is zeroed and ready for measurement. 31 pH · Remove the cuvette and add 5 drops of HI 93710-0 Phenol Red Indicator. [. . . ]