HI 772

Marine Alkalinity

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 [email protected] or view our worldwide contact list at www.hannainst.com.

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 772 meter is supplied complete with:

• Two Sample Cuvettes and Caps

• HI 755-26 Reagents for 25 tests

• 1 mL syringe with tip

• 1 x 1.5V AAA Battery

• Instruction Manual and Quick Reference

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

Technical specifications:

Range

Resolution

Accuracy

Light Source

Light Detector

Method

Environment

Battery Type

Auto-Shut off

Dimensions

Weight

0.0 to 20.0 dKH

0.1 dKH

±0.3 dKH ±5% of reading @ 25 °C / 77 °F

Light Emitting Diode @ 610 nm

Silicon Photocell

Colorimetric method. The reaction causes a distinctive range of colors from yellow to green to greenish blue to develop.

0 to 50 °C (32 to 122 °F); max 95% RH non-condensing

1 x 1.5V AAA

After 10 minutes of non-use

86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)

64 g (2.3 oz.)

Functional description:

Errors and warnings:

1. Dust cover.

2. Cuvette with cap.

3. Cuvette holder.

4. Liquid Crystal Display.

5. Button.

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 “0.0” 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.

w w w . h a n n a i n s t . c o m

Measurement procedure:

• 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 the cuvette with 10 mL of unreacted sample and replace the cap. Place the cuvette into the meter and close the meter’s cap.

10 mL

• 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. Using a 1 mL syringe carefully add exactly 1.00 mL of HI 755S

Reagent to the sample. Replace the cap and gently invert 5 times. Place the cuvette back into the meter.

Note : Pay attention not to spill reagent otherwise full color development may be inhibited.

• Press the button. The instrument directly displays the concentration of alkalinity in dKH. Alkalinity conversion:

1 dKH = 17.86 ppm CaCO

3

= 0.358 meq/L

The meter automatically turns off after

10 minutes.

Tips for an accurate measurement

• 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.

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.

Accessories:

REAGENT SETS

HI 755-26

OTHER ACCESSORIES

HI 772-11

HI 731318

HI 731321

HI 731225

HI 740028

HI 740142

HI 93703-50

Reagent for 25 Marine Alkalinity tests, 1 syringe and 1 tip

Marine Alkalinity Certified Standard Kit

Cloth for wiping cuvettes (4 pcs.)

Glass cuvettes (4 pcs.)

Black Cuvette Cap for Checker HC (4 pcs.)

1.5V AAA batteries (4 pcs.)

1 mL graduated syringe

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: w w w . h a n n a i n s t . c o m

• 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.