Hanna Instruments HI 721 - Manual (Page 2)

• Turn the meter on by pressing the button.
All segments will be displayed. When the
display shows “Add”, “C.1” with “Press”
blinking, the meter is ready.
• Fill the cuvette with 10 mL of unreacted
sample and replace the cap. Place the cuvette
into the meter and close the meter’s cap.
• Press the button. When the display shows
“Add”, “C.2” with “Press” blinking the
meter is zeroed.
• Remove the cuvette from the meter and
unscrew the cap. Add the content of one
packet of HI 721-25 reagent. Replace the
cap and shake gently for 2 minutes until
the powder is completely dissolved. Place
the cuvette back into the meter.
• Press and hold the button until the timer is
displayed on the LCD (the display will show
the countdown prior to the measurement) or,
alternatively, wait for 3 minutes and press the
button.
• The instrument directly displays the
concentration of iron in ppm. The meter
automatically turns off after 2 minutes.
10 mL
• 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
HI 731318
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.
REAGENT SETS
HI 721-25
Reagents for 25 Iron High Range tests
OTHER ACCESSORIES
HI 721-11
Iron HR Certified Standard Kit
HI 731318 Cloth for wiping cuvettes (4 pcs.)
HI 731321 Glass cuvettes (4 pcs.)
HI 731225 Cuvette black cap for checker HC (4 pcs.)
HI 731353 Cuvette seal cap for checker HC (4 pcs.)
HI 740028 1.5V AAA batteries (4 pcs.)
HI 93703-50 Cuvette cleaning solution (230 mL)
Recommendations for Users
For additional information, contact your
dealer or the nearest
Hanna Customer Service Center.
To find a Hanna Office in your area,
visit our web site:
Hanna Instruments reserves the right to modify the design, construction or
appearance of its products without advance notice.
Battery management
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.
IST721 03/13
Measurement procedure: Accessories: Tips for an accurate measurement
Before using this product, make sure that it is entirely suitable for your specific application and for the
environment in which it is used.
Operation of this instrument may cause unacceptable interferences to other electronic equipment, thus
requiring the operator to take all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may degrade the instrument’s EMC
performance.
To avoid damage or burns, do not put the instrument in microwave oven. For the safety of you and the
instrument do not use or store the instrument in hazardous environments.
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