User manual HANNA INSTRUMENTS HI 93748

[. . . ] 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 93748 meter measures the manganese content in water and wastewater in the 0 to 300 µg/L (ppb) 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. Light Emitting Diode @ 555 nm Adaptation of the PAN Method. The reaction between manganese and the reagents causes an orange tint in the sample Light Detector Silicon Photocell Environment 0 to 50 C (32 to 122 F); max 95% RH non-condensing Battery Type/Life 1 x 9 volt/40 hours Auto-Shut off After 10' of non-use Dimensions 180 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ). REQUIRED REAGENTS Code HI 93748A-0 HI 93748B-0 HI 93748C-0 HI 93703-51 Description Quantity Ascorbic acid 2 packets Alkaline-cyanide sol. 0. 40 mL 0. 1% PAN indicator 2 mL Dispersing Agent 4-6 drops (only when necessary, see note) V REAGENT SETS HI 93748-01 Reagents for manganese LR (100 pcs of HI93748A-0, 20 mL of HI93748B-0, 100 mL of HI93748C-0, 20 mL of HI93703-51) HI 93748-03 Reagents for manganese LR (300 pcs of HI93748A-0, 60 mL of HI93748B-0, 300 mL of HI93748C-0, 60 mL of HI93703-51). OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. ON OFF · Press READ TIMED and the display will show the countdown prior to zeroing the blank. Alternatively wait for 2 minutes and press ZERO. In both cases "SIP" will appear during zeroing. 12 9 3 6 TIPS FOR AN ACCURATE MEASUREMENT The instruction listed below should be carefully followed during testing to ensure best accuracy. · Do not touch the cuvet walls with hands. · In order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvet to prevent any contamination. · Do not let the test sample stand too long after reagent is added or accuracy will be lost. · Whenever the cuvet is placed into the measurement cell, it must be completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. · It is important that the sample does not contain any debris. [. . . ] · Place the cuvet with the reacted deionized water (blank) into the holder and ensure that the notch on the cap is positioned securely into the groove. B · The instrument directly displays concentration in µg/L of manganese on the display. 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 the turbidity. INTERFERENCES Interference may be caused by: Aluminum above 20 mg/L Cadmium above 10 mg/L Calcium above 200 mg/L as CaCO3 Cobalt above 20 mg/L Copper above 50 mg/L Iron above 10 mg/L Lead above 0. 5 mg/L Magnesium above 100 mg/L as CaCO3 Nickel above 40 mg/L Zinc above 15 mg/L. 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. [. . . ]