Hanna Instruments HI 727 - 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 one cuvette up to the 10 mL mark with
deionized water and replace the cap. This is
the blank.
• Place the blank 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.
• Fill second cuvette up to the 10 mL mark with
unfiltered sample and replace the cap. This is
the apparent color.
• Insert the apparent color cuvette into the meter
and close the meter’s cap.
• Press the button and the meter directly displays
the value of apparent color.
• Remove the cuvette and press the button twice
to restart the meter.
• Filter 50 mL of sample through a 0.45 µ m
membrane filter into a beaker.
• After measuring of apparent color rinse the
cuvette three times with filtered sample and
then fill it up to the 10 mL mark with the
filtered sample and replace the cap. This is
the true color.
• Follow the procedure above to re-zero the
meter using the blank cuvette.
• Insert the true color cuvette into the instrument.
• Press the button and the meter directly displays
concentration in color units of the true color on
the LCD.
• 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 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.
REQUIRED ACCESSORIES
0.45
µ m membrane filter for true color measurement.
OTHER ACCESSORIES
HI 727-11
Color of Water 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.
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:
w w w . h a n n a i n s t . c o m
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 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.
IST727 03/13
Measurement procedure: Accessories: Tips for an accurate measurement
10 mL
10 mL