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 CaCO
3
= 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.