User manual HANNA INSTRUMENTS HI 83099

[. . . ] Instruction Manual HI 83099 COD and Multiparameter Bench Photometer 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Rinse a graduated beaker several times with unreacted sample, before filling it to the 50 mL mark with the sample. · Add 0. 5 mL of HI 93719A-0 Magnesium indicator solution, then swirl to mix. · Add 0. 5 mL of HI 93719B-0 Alkali solution and swirl to mix. Use this solution to rinse 2 cuvettes. 59 Hardness Mg · Fill both cuvettes up to the 10 mL mark. 10 mL #1 10 mL #2 · Add 1 drop of HI 93719C-0 EDTA solution to one cuvette (# 1), replace the cap and invert the cuvette several times to mix. This is the blank. #1 · Add 1 drop of HI 93719D-0 EGTA solution to the second cuvette (# 2), replace the cap and invert the cuvette several times to mix. This is the sample. #2 · Place the blank (# 1) into the holder and close the lid. #1 · Press the Zero key. The meter will show "-0. 0-" when the meter is zeroed and ready for measurement. #2 · Remove the blank (# 1), insert the sample (# 2) into the instrument, and close the lid. · Press Read to start the reading. The instrument displays concentration in mg/L of magnesium hardness, as CaCO3. Hardness Mg 60 · Press or to access the second level functions. · Press the Chem Frm key to convert the result in mg/L of Magnesium (Mg2+). · Press the Unit key to change the current measurement unit. The results can be converted to French degrees (°f), German degrees (°dH) and English degrees (°E). · Press or to return to the measurement screen. Note: This test will detect any magnesium contamination in the beakers, measuring syringes or sample cells. To test cleanliness, repeat the test multiple times until you obtain consistent results. SAMPLE DILUTION This meter is designed to determine hardness typically found in water purification systems. In order to measure samples with high hardness, follow dilution procedure explained on page 58 (Ca Hardness). INTERFERENCES Interference may be caused by excessive amounts of heavy metals. 61 Hardness Mg HYDRAZINE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 0 to 400 g/L 1 g/L ±4% of full scale reading at 25 °C ±2 g/L Tungsten lamp with narrow band interference filter @ 420 nm Adaptation of the ASTM Manual of Water and Environmental Technology, method D1385-88, p-Dimethylaminobenzaldehyde method. The reaction between hydrazine and the liquid reagent causes a yellow tint in the sample. Description Liquid Reagent Quantity 24 drops Code HI 93704-0 REQUIRED REAGENT REAGENT SETS HI 93704-01 Reagents for 100 tests HI 93704-03 Reagents for 300 tests For other accessories see page 132. MEASUREMENT PROCEDURE · Select the Hydrazine method using the procedure described in the Method Selection section (see page 12). · Fill one cuvette up to the mark with 10 mL of distilled water. #1 10 mL #1 · Place the cap, insert the cuvette # 1 into the holder and close the lid. · Press the Blank key to start adjusting the light level. The display will show "Blank done" when the meter is ready to take a zero measurement. · Fill a second cuvette with 10 mL of unreacted sample (up to the mark) and replace the cap. Hydrazine 10 mL #2 62 · Add 12 drops of the HI 93704-0 reagent to each cuvette. Replace the caps and shake gently to mix (about 30 seconds). #1 #2 #1 · Place the blank (#1) into the holder and close the lid. · Press Timer and the display will show the countdown prior to zeroing the blank. The display will show "-0. 0-" when the meter is zeroed and ready for measurement. · Remove the blank. · Insert the cuvette with the reacted sample (# 2) into the instrument and close the lid. #2 · Press Read to start the reading. The instrument displays concentration in g/L of hydrazine. INTERFERENCES Interference may be caused by: Highly colored samples Highly turbid samples Aromatic amines 63 Hydrazine IODINE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 0. 0 to 12. 5 mg/L 0. 1 mg/L ±0. 1 mg/L ±5% of reading at 25 °C ±0. 1 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, DPD method. The reaction between iodine and the reagent causes a pink tint in the sample. Description DPD Reagent Quantity 1 packet REQUIRED REAGENTS Code HI 93718-0 REAGENT SETS HI 93718-01 Reagents for 100 tests HI 93718-03 Reagents for 300 tests For other accessories see page 132. MEASUREMENT PROCEDURE · Select the Iodine method using the procedure described in the Method Selection section (see page 12). [. . . ] · Insert the sample into the instrument. · Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait for 3 minutes and 30 seconds and press Read. When the timer ends the meter will perform the reading. · The instrument displays the results in mg/L of zinc. INTERFERENCES Interference may be caused by: Aluminum above 6 mg/L Cadmium above 0. 5 mg/L Copper above 5 mg/L Iron above 7 mg/L Manganese above 5 mg/L Nickel above 5 mg/L Zinc 128 ERRORS AND WARNINGS The instrument shows clear warning messages when erroneous conditions appear and when measured values are outside the expected range. No Light: The light source is not functioning properly. Light Leak: There is an excess amount of ambient light reaching the detector. Inverted cuvettes: The sample and the zero cuvettes are inverted. Battery Low: The battery capacity is lower than 10%. Light Low: The instrument cannot adjust the light level. [. . . ]