User manual HANNA INSTRUMENTS HI 93740

[. . . ] A flashing value higher than the maximum concentration readable (see specifications) indicates that the sample absorbs too much light, meaning that the concentration is too high. The cuvet is not inserted correctly and an excess ambient light is reaching the detector. If the cover is properly installed, then contact your dealer or the nearest Hanna Customer Service Center. The zero sample is too dark for proper zeroing. [. . . ] If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc. , Woonsocket, Rhode Island, 02895 , USA. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. The HI 93740 meter measures the nickel content in water and wastewater in the 0. 000 to 1. 000 mg/L (ppm) range. The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same place every time it is placed into the measurement cell. The reagents are in liquid and powder form and are supplied in bottles and in packets. The amount of reagent is precisely dosed to ensure maximum repeatability. Display codes aid the user in routine operations. The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. REQUIRED REAGENTS Code HI 93740A-0 HI 93740B-0 HI 93740C-0 HI 93703-51 Description Quantity Phthalate phosphate 2 packets 0. 3% PAN indicator 2 mL EDTA 2 packets Dispersing Agent 4-6 drops (only when necessary, see note) V REAGENT SETS HI 93740-01 Reagents (100 pcs of HI93740A-0, 100mL of HI93740B-0, 100 pcs of HI93740C-0, 20 mL of HI93703-51) HI 93740-03 Reagents (300 pcs of HI93740A-0, 300mL of HI93740B-0, 300 pcs of HI93740C-0, 60 mL of HI93703-51) OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. Note: for best results perform your tests between 20-24°C. · When the LCD displays "- - -", it is ready. · Fill one graduated beaker with 25 mL of deionized water (blank) and another one with 25 mL of sample. · Add the content of one packet of HI 93740A phthalate-phosphate reagent to each beaker. Cap and shake gently until the reagent is dissolved. Note: If sample contains iron (Fe3+), it is important that all powder be dissolved completely before continuing with following step. · Add 1 mL of HI 93740B 0. 3% PAN solution to each beaker, swirl to mix and then wait for 15 minutes. ON OFF · Wait for a few seconds and the display will show "-0-". Now the meter is zeroed and ready for measurement. · Fill a second cuvet up to 1. 5 cm (¾") below the rim with 10 mL of the reacted sample. · Insert the second cuvet into the instrument. [. . . ] Note: a temperature above 30°C may cause turbidity. In this case, before zeroing and taking readings, add 2-3 drops of Dispersing Agent (HI93703-51) to each cuvet and swirl until complete dissolution of turbidity. CE DECLARATION OF CONFORMITY INTERFERENCES Interference may be caused by: Co2+ must not be present Fe2+ must not be present Al3+ above 32 mg/L Ca2+ above 1000 mg/L (as CaCO3) Cd2+ above 20 mg/L Cl­ above 8000 mg/L Cr3+ above 20 mg/L Cr6+ above 40 mg/L Cu2+ above 15 mg/L F­ above 20 mg/L Fe3+ above 10 mg/L K+ above 500 mg/L Mg2+ above 400 mg/L Mn2+ above 25 mg/L Mo6+ above 60 mg/L Na+ above 5000 mg/L Pb2+ above 20 mg/L Zn2+ above 30 mg/L · Add one packet of HI 93740C EDTA reagent to each beaker, cap and swirl to mix until complete dissolution. 1. 5 cm · Fill one cuvet up to 1. 5 cm (¾") below the rim with 10 mL of the blank. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. BATTERY REPLACEMENT Battery replacement must only take place in a non-hazardous area using a 9V alkaline battery. Simply slide off the battery cover on the back of the meter. [. . . ]