Hanna Instruments HI 729 User Manual

HI 729

Fluoride Low 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 729 meter is supplied complete with:

• Two Sample Cuvettes and Caps

• 1 bottle (30 mL) of HI 729S Fluoride LR Reagent

• 1 mL syringe with tip

• 1 x 1.5V AAA Battery

• Instruction Manual

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

Technical specifications:

Range 0.00 to 2.00 ppm

Resolution 0.01 ppm

Accuracy ±0.10 ppm ±5 % of reading @ 25 °C / 77 °F

Typical EMC Dev. ±0.01 ppm

Light Source Light Emitting Diode @ 575 nm

Light Detector Silicon Photocell

Method Adaptation of the

of Water and Wastewater, 18

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.)

Standard Methods for the Examination

th

edition

, SPADNS method.

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

more light than the zero reference. Check the procedure and make
sure that the sample and zero cuvette are not inverted.
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

• It is important that the sample does not contain any debris.

• 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.

• Using supplied syringe add 2 mL of HI 729S

SPADNS reagent to both cuvettes.

• Fill the first cuvette to the line with 8 mL of

deionized water and the second cuvette to
the line with 8 mL of sample. Cap cuvettes
and invert several times to mix.

• Place the first cuvette (deionized water) into

the meter and close the cap.

• Press and hold the button until the timer is

displayed on the LCD. Alternatively wait for
two minutes and press the button.

• When the display shows “Add”, “C.2” with
“Press” blinking the meter is zeroed.

• Remove the cuvette.

• Insert the second cuvette (sample) into the

instrument and press the button.

• The instrument directly displays the

concentration of fluoride in ppm.

The meter automatically turns off after 10
minutes.

10 mL

10 mL

• 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.

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 729-26 Reagent set for 20 tests (4 x HI 729S and a 1 mL syringe with tip)

OTHER ACCESSORIES
HI 729-11 Fluoride LR Certified Standard Kit
HI 740142 1 mL graduated syringe
HI 740028 1.5V AAA batteries (4 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)
HI 70436 Deionized water (1 gal)

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

IST729 05 /11