Hanna Instruments HI 733 - Manual (Page 2)

• It is important that the sample does not contain any debris.
• Whenever the cuvette is placed into the measurement cell, the outside must be
dry, 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 733-25
Reagent set for 25 tests
OTHER ACCESSORIES
HI 733-11
Ammonia HR Certified Standard Kit
HI 740028 1.5V AAA batteries (4 pcs)
HI 740142 1 mL graduated syringe (1 pcs)
HI 740144 Pipette tip (1 pcs)
HI 740157 Plastic refilling pipette (2 pcs)
HI 731318 Cloth for wiping cuvettes (4 pcs)
HI 731321 Glass cuvettes (4 pcs)
HI 731225 Cuvette cap for checker HC (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.
IST733 02/12
Measurement procedure: Accessories: Tips for an accurate measurement
• 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.
• Use the syringe to add 1 mL of unreacted
sample to the cuvette. Add 9 mL of
HI 733B-0
reagent B to the cuvette, using the
plastic pipette. Place the cap and swirl the
solution to mix. 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 4 drops of HI 733A-0
reagent A. Replace the cap and swirl the
solution. 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 30 seconds
and press the button.
• The instrument displays the results in mg/L
(ppm) of ammonium ion (NH
4
+ ). To convert
the reading to ppm of ammonia (NH
3
), multiply
the reading by the factor 0.944. To convert
the reading to ppm of ammonia nitrogen (NH
3
-
N), multiply the reading by the factor 0.776.
The meter automatically turns off after 10
minutes.