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HI721

  

Iron High Range

INSTRUCTION MANUAL

  • It is important that the sample does not contain any debris.
  • Whenever the cuvette is placed into the measurement cell, it 

must be dry outside, and completely free of fingerprints, oil and 
dirt. Wipe it thoroughly with 

HI731318

 or a lint-free cloth prior 

to insertion.

  • Shaking the cuvette can generate bubbles, causing higher 

readings. To obtain accurate measurements, remove bubbles by 
swirling or by gently tapping the cuvette.

  • Do not let the reacted sample stand for too long after reagent is 

added, as accuracy will be affected.

  • After the reading it is important to immediately discard the 

sample, otherwise the glass might become permanently stained.

HI7

1

2

To save the battery, the instrument shuts down after 3 minutes of non-use and 2 minutes 
after read.
One fresh battery lasts for a minimum of 5000 measurements. When the battery is dead the 
instrument will display “

bAd

” then ”

bAt

” for 1 second and then turns off.

To restart the instrument, the battery must be replaced with a new one.
To replace the instrument’s battery:
•  Turn the instrument off by holding the button until the meter shuts off.
•  Turn the instrument upside down and remove the battery cover with a screwdriver.

•  Remove the battery from its location and replace it with a new one, inserting the negative 

end first.

•  Insert the battery cover and replace the screw with a screwdriver.

Tips for an Accurate Measurement

Battery Management

Before using Hanna Instruments products, make sure that they are entirely suitable for 
your specific application and for the environment in which they are used. Operation of 
these instruments may cause unacceptable interferences to other electronic equipment, thus 
requiring the operator to take all necessary steps to correct such interferences. Any variation 
introduced by the user to the supplied equipment may degrade the instrument’s EMC 
performance. To avoid damages or burns, do not put the instrument in microwave oven. For 
yours and the instrument safety do not use or store the instrument in hazardous environments.

Recommendations for Users

IST721   05/18

HI721

 is warranted for a period of one year after date of purchase against defects in 

workmanship and materials when used for their 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 instrument is to 
be returned to Hanna Instruments, first obtain a Return Goods Authorization number from the 
Technical Service department and then send it with shipping costs prepaid. When shipping any 
instrument, make sure it is properly packed for complete protection.

Warranty

Accessories

Reagent Sets

HI721-25

Reagents for 25 Iron High Range tests

Other Accessories

HI721-11

Iron HR Certified Standard Kit

HI731225

Cuvette Black Cap for Checker

®

 HC Colorimeters (4 pcs.)

HI731318

Cloth for wiping cuvettes (4 pcs.)

HI731321

Glass cuvettes and Seal Cap for Checker

®

 HC Colorimeters  (4 pcs.)

HI731353

Cuvette Seal Cap for Checker

®

 HC Colorimeters (4 pcs.)

HI740028P

1.5V AAA batteries (12 pcs.)

HI93703-50

Cuvette cleaning solution (230 mL)

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