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. Using a 1 mL syringe carefully add exactly
1.00 mL of
HI772S
Reagent to the sample. Replace
the cap and gently invert 5 times. Place the cuvette
back into the meter.
Note: Pay attention not to spill reagent otherwise
full color development may be inhibited.
Press the button. The instrument directly displays
the concentration of alkalinity in dKH. Alkalinity
conversion:
1 dKH
= 17.86 ppm CaCO
3
= 0.358 meq/L
The meter automatically turns off after 10 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
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.
HI772
To save the battery, the instrument shuts down after 10 minutes of non-use.
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.
IST772 02 /17
Measurement Procedure
HI772S
Tips for an Accurate Measurement
Battery Management
Reagent sets
HI772-26
Reagent for 25 Marine Alkalinity tests, 1 syringe and 1 tip
Other Accessories
HI772-11
Marine Alkalinity Certified Standard Kit
HI731318
Cloth for wiping cuvettes (4 pcs.)
HI731321
Glass cuvetes (4 pcs.)
HI731225
Black Cuvette Cap for Checker HC (4 pcs.)
HI740028P
1.5V AAA batteries (12 pcs.)
HI740142P
1 mL graduated syringe (10 pcs.)
HI93703-50
Cuvette cleaning solution (230 mL)
Accessories
Hanna Instruments reserves the right to modify the design, construction, or appearance of its products
without advance notice.
Warranty
HI772
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.
Recommendations for Users
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.
