Hanna Instruments HI 775 - User Manual

Alkalinity
Dear Customer,
Thank you for choosing a Hanna Instruments Product.
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 775 meter is supplied complete with:
• Two Sample Cuvettes and Caps
• 1 bottle of HI 775 Alkalinity Liquid Reagent
• 1 mL syringe with tip
• 1 x 1.5V AAA Battery
• Instruction Manual
HI 775
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”.
Technical specifications:
Range 0 to 500 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 blue to develop. This
meter has been developed to work with fresh water
samples.
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.)
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Hanna Instruments HI 775 Specifications

General

Model	HI 775
Category	Measuring Instruments
Type	Colorimeter
Light Detector	Silicon Photocell
Measurement Range (as Fe)	0.00 to 5.00 mg/L
Resolution (as Fe)	0.01 mg/L
Resolution (as CaCO3)	1 mg/L
Accuracy (as CaCO3)	±5 mg/L
Light Source	LED
Environment	0 to 50°C (32 to 122°F); max 95% RH non-condensing

Summary

Preliminary Examination and Functional Description

Preliminary Examination

Instructions for checking instrument condition and contents upon receipt.

Functional Description

Identification of key components of the HI 775 Alkalinity meter.

Errors, Warnings, and Technical Specifications

Errors and Warnings

Common error messages and warnings with their causes and solutions.

Technical Specifications

Detailed technical data including range, resolution, accuracy, and environmental limits.

Measurement Procedure and Tips

Measurement Procedure

Step-by-step guide for performing an alkalinity measurement with the meter.

Tips for Accurate Measurement

Recommendations for ensuring precise and reliable alkalinity readings.

Battery Management, Accessories, and Recommendations

Battery Management

Information on battery life, low battery indication, and replacement procedure.

Accessories

List of available spare parts, reagents, and other useful accessories.

Recommendations for Users

Important advice regarding product suitability, interference, and safe operation.