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Manual abstract: user guide HANNA INSTRUMENTS HI 93750
Detailed instructions for use are in the User's Guide.
[. . . ] 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. [. . . ] If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. 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 93750 meter measures the potassium (K) content in water, wastewater and seawater in the 0. 0 to 50. 0 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 in liquid form are supplied in bottles and the reagents in powder are supplied 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.
Typical EMC Deviation Light Source Method Light Detector Environment
Light Emitting Diode @ 470 nm Tetraphenylborate Method Silicon Photocell 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 93750A-0 HI 93750B-0 HI 93750-01 Description Quantity Potassium Reagent 6 drops Powder Reagent 1 packet Reagents for 100 tests
REQUIRED REAGENTS
OPERATIONAL GUIDE
MEASUREMENT PROCEDURE
· Turn the meter on by pressing ON/OFF.
ON OFF
· Add one packet of HI 93750B-0 reagent. Replace the cap and mix very gently for one minute by turning the cuvet upside down.
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. [. . . ] Simply slide off the battery cover on the back of the meter. 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
ZERO
· Wait for a few seconds and the display will show "-0. 0-". [. . . ]
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