Hanna Instruments HI 733 User Manual

HI 733

Ammonia High Range

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna Instruments Product.

Please read this instruction manual carefully before using the instrument. If you need
additional technical information, do not hesitate to e-mail us at [e-mail].

Preliminary examination:

Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occurred during shipment, please notify your Dealer.
Each HI 733 meter is supplied complete with:

• Two Sample Cuvettes and Caps

• One bottle of HI 733A-0 Reagent A

• One bottle of HI 733B-0 Reagent B

• 1 x 1.5V AAA Battery

• Instruction Manual

For more details about spare parts and accessories
see “Accessories”.

Technical specifications:

Range 0.0 to 99.9 ppm as NH

Resolution 0.1 ppm

Accuracy ±1.0 ppm ±5 % of reading @ 25 °C / 77 °F

Typical EMC Dev. ±0.1 ppm

Light Source Light Emitting Diode @ 470 nm

Light Detector Silicon Photocell

Method Adaptation of the ASTM Manual of Water and Environ-

mental Technology, D1426-92, Nessler method. The
reaction between ammonia and reagents causes a yellow
tint in the sample.

Environment 0 to 50 °C (32 to 122 °F);

max 95% RH non-condensing

Battery Type 1 x 1.5V AAA

Auto-Shut off After 10 minutes of non-use

Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)

Weight 64 g (2.25 oz.)

+

4

Functional description:

1. Dust cover.

2. Cuvette with cap.

3. Cuvette holder.

4. Liquid Crystal Display.

5. Button.

Errors and warnings:

Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.

Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.

Inverted cuvettes: The sample and the zero cuvette are inverted.

Under range: A blinking “0.00” indicates that the sample absorbs

less light than the zero reference. Check the procedure and make sure
you use the same cuvette for reference (zero) and measurement.
Over Range: A flashing value of the maximum concentration indicates
the reading is over range. Dilute the sample and re-run the test.

Battery low: The battery must be replaced soon.

Dead battery: This indicates that the battery is dead and must be

replaced. Once this indication is displayed, normal operation of the
instrument will be interrupted. Change the battery and restart the
meter.

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
the reading to ppm of ammonia (NH3), multiply

+

). To convert

4

the reading by the factor 0.944. To convert
the reading to ppm of ammonia nitrogen (NH3­N), multiply the reading by the factor 0.776.
The meter automatically turns off after 10
minutes.

• 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.

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.

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.

Hanna Instruments reserves the right to modify the design, construction, or

appearance of its products without advance notice.

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:

www.hannainst.com

IST733 02/12