User manual HANNA INSTRUMENTS HI 93701

[. . . ] This instrument is in compliance with directives. Specifications Display Code Guide This indicates that the meter is in a ready state and zeroing can be performed. This indicates that the meter is in a zeroed state and measurement can be performed. A blinking "0. 00" indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvet for reference (zero) and measurement. [. . . ] 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 93701 portable microprocessor meter measures the free chlorine (Cl2) content in water and wastewater in the 0. 00 to 2. 50 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 or powder form and are supplied in bottles or in packets. The amount of reagent is precisely dosed to ensure maximum repeatability. The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. ±0. 01 mg/L Light Emitting Diode @ 555 nm Adaptation of the EPA recommended DPD method 330. 5. The reaction between free chlorine and the DPD reagent causes a pink 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 80 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") Weight 290 g (10 oz. ) REQUIRED REAGENTS POWDER: Code HI 93701-0 LIQUID: Code HI 93701A-F HI 93701B-F Description DPD Description DPD1 Indicator DPD1 Buffer Quantity 1 packet Quantity 3 drops 3 drops Operational Guide MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · Fill the cuvet with 10 mL of 10 mL unreacted sample, up to the mark, and replace the cap. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO and "SIP" will appear on the display. ZERO · The instrument directly displays concentration in mg/L of free chlorine on the Liquid Crystal Display. ON OFF Tips for an Accurate Measurement The instruction listed below should be carefully followed during testing to ensure best accuracy. · 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 possible to take multiple readings in a row, but it is recommended that a zero reading be taken for each sample and that the same cuvet is used for zeroing and measurement. · It is important to discard the sample immediately after the reading is taken because the glass might become permanently stained. · Shaking the cuvet can generate bubbles in the sample, causing higher readings. [. . . ] In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately 1 minute after adding the powder reagent. Battery Replacement Battery replacement must only take place in a non-hazardous area using a 9V alkaline battery. Detach the battery from the terminals and attach a fresh 9V battery while paying attention to the correct polarity. Replace the battery and the cover. 9V Recommendations for Users Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. [. . . ]