HI 755
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 tech@hannainst.com.
Preliminary examination:
Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occured during shipment, please notify your Dealer.
Each HI 755 meter is supplied complete with:
• Two Sample Cuvettes and Caps
• 1 bottle of Alkalinity Liquid Reagent
• 1 mL syringe with tip
• 1 x 1.5V AAA Battery
• Instruction Manual
HI 755
Technical specifications:
Range 0 to 300 ppm
Resolution 1 ppm
Accuracy ±5% of reading ±5 ppm @ 25°C
Typical EMC Dev. ±1 ppm
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-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.).
Functional description:
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” 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.
1. Dust cover.
2. Cuvette with cap.
3. Cuvette holder.
4. Liquid Crystal Display.
5. Button
For more details about spare parts and accessories
see “Accessories”.
www.hannainst.com
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