Hanna Instruments HI755 Checker HC Low Range Saltwater Aquarium Alkalinity Colorimeter User Manual

Introduction

The Hanna Instruments HI755 Checker HC (Handheld Colorimeter) offers a precise and efficient method for measuring alkalinity in saltwater aquariums. Alkalinity is vital in marine environments, supporting coral reef regeneration by providing carbonate ions and buffering against pH fluctuations. This device provides a more accurate and user-friendly alternative to traditional chemical test kits, delivering quick and reliable results.

Key Features:

• Auto Shut-Off: Extends battery life by automatically powering down when not in use.
• Large LCD Screen: Ensures clear and easy readability of measurement results.
• Single Button Operation: Simplifies the testing process for user convenience.
• Enhanced Accuracy: Offers greater precision compared to standard chemical test kits.

Image 1: The Hanna Instruments HI755 Checker HC, a handheld colorimeter, displaying an alkalinity reading of 225 ppm on its LCD screen. The device is blue with "Hanna Checker Marine" branding.

Setup

1. Battery Installation:

   Locate the battery compartment on the back of the device. Open it and insert one AAA battery, ensuring correct polarity. Close the compartment securely.

2. Familiarize with Components:

   Identify the LCD display, the single operational button, and the cuvette holder. The cuvette holder is where the sample vials are placed for measurement.

   

   Image 2: The Hanna Instruments HI755 Checker HC with its protective cap open, showing the internal cuvette holder where sample vials are inserted for testing. The device is blue and white.

3. Prepare Reagents and Vials:

   Ensure you have the necessary HI755-series reagents and clean, dry sample vials (cuvettes) ready for testing. Refer to the reagent instructions for proper handling and storage.

Operating Instructions

Follow these steps for accurate alkalinity measurements:

1. Power On: Press the button to turn on the Checker HC. The display will show "ADD C1".
2. Prepare Sample C1 (Blank):

   Fill a clean cuvette with 10 mL of unreacted water sample. Cap the cuvette and wipe it thoroughly with a lint-free cloth to remove any water spots or fingerprints.

3. Insert Sample C1:

   Place the cuvette containing the unreacted sample into the Checker HC's holder and close the cap.

4. Zero the Instrument:

   Press the button. The display will show "ADD C2" when the instrument is zeroed.

5. Prepare Sample C2 (Reacted Sample):

   Remove the cuvette. Add the specified amount of HI755-series reagent to the sample in the cuvette, as per the reagent instructions. Cap the cuvette and gently invert it several times to mix. Wait for the reaction time specified in the reagent instructions (typically 1 minute).

6. Insert Sample C2:

   Wipe the reacted cuvette thoroughly with a lint-free cloth and place it back into the Checker HC's holder. Close the cap.

7. Take Measurement:

   Press the button. The instrument will perform the measurement and display the alkalinity concentration in ppm (parts per million).

8. Power Off: The Checker HC will automatically shut off after a period of inactivity. To manually power off, press and hold the button until "OFF" is displayed.

Maintenance

• Cleaning the Cuvettes: Always use clean cuvettes for each test. Rinse them thoroughly with deionized water and dry them completely before use.
• Cleaning the Checker HC: Wipe the exterior of the device with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
• Storage: Store the Checker HC in a cool, dry place away from direct sunlight and extreme temperatures. Ensure the battery is removed if the device will not be used for an extended period.
• Reagent Storage: Store reagents according to their specific instructions to maintain their effectiveness.

Troubleshooting

Specifications

• Model Number: TE-HI755
• Parameter: Alkalinity (Low Range)
• Power Source: 1 x AAA Battery
• Manufacturer: Hanna Instruments
• ASIN: B00C2GWEL8
• Package Dimensions: 7.52 x 4.92 x 2.72 inches
• Item Weight: 12.31 ounces

Warranty Information

Hanna Instruments products are typically covered by a limited warranty against defects in materials and workmanship. For specific warranty terms and conditions applicable to your HI755 Checker HC, please refer to the warranty card included with your product or visit the official Hanna Instruments website. Keep your proof of purchase for warranty claims.

Customer Support

For technical assistance, troubleshooting beyond this manual, or inquiries regarding your Hanna Instruments HI755 Checker HC, please contact Hanna Instruments customer support. Contact details can typically be found on the official Hanna Instruments website or in the product packaging.

Online Resources: www.hannainst.com