Tips for an Accurate Measurement • Ensure the sample does not contain any debris. • Whenever the cuvette is placed into the checker, it must be dry outside and free of fingerprints, oil and dirt. • Wipe the cuvette thoroughly with HI731318 microfiber cleaning cloth or a lint-free cloth prior to insertion. • Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. • Do not let the reacted sample stand too long after reagent has been added, as accuracy will be affected. • Discard the sample immediately after the reading has been taken or the glass might become permanently stained. Accessories Reagent Sets HI701-25 Reagents for 25 Free Chlorine tests Free Chlorine certified standard kit Cuvette black cap for Checker® HC colorimeters (4 pcs.) Cloth for wiping cuvettes (4 pcs.) Glass cuvette and seal cap for Checker® HC colorimeters (4 pcs.) Battery Replacement To save the battery, the checker shuts down after 2 minutes of non-use. A fresh battery lasts for a minimum of 5000 measurements. When the battery is drained, the instrument displays “bAd” then ”bAt”, and turns off. To replace the battery, follow the next steps: 1. Press and hold the ON/OFF button to turn the checker off. 2. Turn the instrument upside down and use a screwdriver to unfasten the screw and remove the battery cover. HI93703-50 Cuvette cleaning solution, 230 mL Certification All Hanna Instruments conform to the CE European Directives. Disposal of Electrical & Electronic Equipment. The product should not be treated as household waste. Instead hand it over to the appropriate collection point for the recycling of electrical and electronic equipment which will conserve natural resources. Recommendations for Users Before using this product, make sure it is entirely suitable for your specific application and for the environment in which it is used. Any variation introduced by the user to the supplied equipment may degrade the checker’s performance. For your and the checker’s safety do not use or store it in hazardous environments. Warranty HI701 Checker®HC is warranted for a period of one year against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the checker is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid. When shipping any product, make sure it is properly packaged for complete protection. Hanna Instruments reserves the right to modify the design, construction, or appearance of its products without advance notice. Disposal of waste batteries. This product contains batteries, do not dispose of them with other household waste. Hand them over to the appropriate collection point for recycling. 3. Remove the old battery, replace it with a new 1.5V AAA battery, inserting the negative end first. 4. Replace the battery cover, fasten and tighten the screw. Ensuring proper product and battery disposal prevents potential negative consequences for the environment and human health. For more information, contact your city, your local household waste disposal service, the place of purchase or go to www.hannainst.com. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.

Measurement Procedure • Press the ON/OFF button to turn the checker on. All segments will be displayed for a few seconds, followed by "Add", "C.1" with "Press" blinking. • Fill the cuvette with 10 mL of unreacted sample and replace the cap. Insert the cuvette into the checker and close the cap. • Press the ON/OFF button. When the display shows "Add", "C.2" with "Press" blinking, the checker is zeroed. • Remove the cuvette, unscrew the cap and add the content of one packet of HI701-0 Free Chlorine reagent. Replace the cap and shake gently for 20 seconds. • Insert the cuvette into the checker and...