User manual HANNA INSTRUMENTS HI 93738

[. . . ] 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 93738 meter measures the chlorine dioxide content in water and wastewater in the 0. 00 to 2. 00 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. Light Emitting Diode @ 585 nm Adaptation of the Standard Methods for the Examination of Water and Wastewater, 18 t h edition, Chlorophenol Red method. The reaction between chlorine dioxide and reagents causes a purple to greenishyellow 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. ). V REQUIRED REAGENTS Code HI 93738A-0 HI 93738B-0 HI 93738C-0 HI 93738D-0 Description Reagent A Dechlorinating Reagent B Reagent C Reagent D Quantity 1 mL 1 packet 1 mL 1 mL REAGENT SETS HI 93738-01 Reagents for 100 tests HI 93738-03 Reagents for 300 tests OPERATIONAL GUIDE MEASUREMENT PROCEDURE · Turn the meter on by pressing ON/OFF. · When the LCD displays "- - -", it is ready. · Fill two graduated mixing cylinders (#1 & #2) up to the 25 mL mark with the sample. ON OFF · Add 0. 5 mL of HI 93738D chlorine dioxide reagent to each cylinder (#1 & #2), close them and invert several times to mix. Cylinder #2 is the sample. SAMPLING PROCEDURE It is recommended to analyze chlorine dioxide samples immediately upon collection. Chlorine dioxide samples must be stored in dark, glass stoppered bottles, with minimal head space. Excessive heat (greater than 25°C/78°F), agitation and exposure to light must be avoided. ACCESSORIES REAGENT SETS HI 93738-01 Reagents for 100 tests HI 93738-03 Reagents for 300 tests OTHER ACCESSORIES HI 710009 HI 710010 HI 721310 HI 731318 HI 731321 HI 731325 HI 93703-50 Blue rubber boot Orange rubber boot 9V battery (10 pcs) Tissue for wiping cuvets (4 pcs) Glass cuvets (4 pcs) Caps for cuvets (4 pcs) Cuvets cleaning solution (230 mL). INTERFERENCES D Interferences may be caused by strong oxidants. #1 · Fill a cuvet with 10 mL of the blank (#1) up to 1. 5 cm (¾") below the rim and replace the cap. TIPS FOR AN ACCURATE MEASUREMENT The instruction listed below should be carefully followed. · 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. [. . . ] Now the meter is zeroed and ready for measurement. · Fill a cuvet with 10 mL of the reacted sample (#2) up to 1. 5 cm (¾") below the rim and replace the cap. #2 1. 5 cm #1 · Add precisely 0. 5 mL of HI 93738C chlorine dioxide reagent to each cylinder (#1 & #2), close them and invert several times to mix. · Insert the sample into the instrument. · Press READ and "SIP" will appear during measurement. 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. [. . . ]