Hanna Instruments HI772 User manual

HI772
Marine Alkalinity
INSTRUCTION MANUAL
• 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 HI731318 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.
HI772
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.
Tips for an Accurate Measurement
Battery Management
IST772 07/18
Reagent sets
HI772-26 Reagents for 25 Marine Alkalinity tests, 1 syringe and 1 tip
Other Accessories
HI772-11 Marine Alkalinity Certified Standard Kit
HI731318 Cloth for wiping cuvettes (4 pcs.)
HI731315 Glass Cuvettes and Caps for Checker®HC Colorimeters (2 pcs.)
HI740028P 1.5V AAA batteries (12 pcs.)
HI740142P 1 mL graduated syringe (10 pcs.)
HI93703-50 Cuvette cleaning solution (230 mL)
Accessories
Warranty
HI772 is warranted for a period of one year after date of purchase against defects in
workmanship and materials when used for their intended purpose and maintained according
to instructions. This warranty is limited to repair or replacement free of charge. Damage due
to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service
is required, contact your local Hanna Instruments Office. If under warranty, report the model
number, date of purchase, serial number and the nature of the problem. If the repair is not
covered by the warranty, you will be notified of the charges incurred. If the instrument is to
be returned to Hanna Instruments, first obtain a Return Goods Authorization number from the
Technical Service department and then send it with shipping costs prepaid. When shipping any
instrument, make sure it is properly packed for complete protection.
Recommendations for Users
Before using Hanna Instruments products, make sure that they are entirely suitable for your
specific application and for the environment in which they are used. Any variation introduced
by the user to the supplied equipment may degrade the meter’s performance. For yours and
the instrument safety do not use or store the instrument in hazardous environments.

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.
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 mL
of HI772S 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 CaCO3
= 0.358 meq/L
The meter automatically turns off after 10 minutes.
Measurement Procedure
HI772S
Thank You
Thank you for choosing a Hanna Instruments product. Please read this
instruction manual carefully before using the instrument.
For more information about Hanna Instruments and our products, visit
www.hannainst.com.
For technical support, contact your local Hanna Instruments Office or e-mail us
at [email protected]
Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occurred during shipment, please contact your local Hanna Instruments Office.
Each HI772 meter is supplied complete with:
• Sample Cuvettes and Caps (2 pcs.)
• Reagents for 25 tests
• 1 mL syringe with tip
• 1.5V AAA Battery (1 pc.)
• Instruction Manual and Quick Reference Guide
Preliminary Examination
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.
Functional Description
Cover
Cuvette with cap
Cuvette holder
LCD Liquid Crystal Display
Operation Button
Errors and Warnings
Range 0.0 to 20.0 dKH
Resolution 0.1 dKH
Accuracy ±0.3 dKH ±5% of reading @25 °C/77 °F
Light Source Light Emitting Diode @610 nm
Light Detector Silicon Photocell
Method Colorimetric method. The reaction causes a distinctive range of
colors from yellow to green to greenish blue to develop.
Environment 0 to 50 °C (32 to 122 °F); max 95% RH non-condesing
Battery Type 1.5V AAA (1 pc.)
Auto-Shut off After 10 minutes of non-use
Dimensions 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight 52 g (1.84 oz.)
Specifications
Hanna Instruments reserves the right to modify the design, construction or appearance of
its products without advance notice.