•Turn the meter on by pressing the button. All
segments will be displayed. When the display
shows “Add”, “C1” 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 749-0 reagent. Replace the cap and
shake vigorously for about 10 seconds. 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 6 minutes and press the
button.
•The instrument directly displays the
concentration of chromium in ppb. 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 HI 731318 or a lint-free cloth prior to insertion.
•Shaking the cuvette can generate bubbles, causing lower 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 749-25 Reagent set for 25 Chromium VI Low Range tests
OTHER ACCESSORIES
HI 749-11 Chromium VI LR 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
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.
Hanna Instruments reserves the right to modify the design, construction or
appearance of its products without advance notice.
Battery management
IST749 04/13
Measurement procedure: Accessories:Tips for an accurate measurement
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.
