Hanna Checker® Marine Magnesium (Mg) HI-783

Each HI-783 is delivered in a case with a custom insert and is supplied with:

• Sample cuvette and cap (2 pcs.)
• Marine Magnesium reagent starter kit (reagents for 25 tests)
• 1 mL graduated syringe and tip (1 pc.)
• 5 mL syringe and tip with black printing (1 pc.)
• 5 mL syringe and tip with blue printing (1 pc.)
• 1.5V AAA Alkaline battery (1 pc.)
• Instruction manual
• Quick-reference guide

HI-783 features a single-button operation system and is easy to use.

The large LCD is easy to read and the auto shut-off feature assures the battery will not be drained.

Measurement Procedure

1. Ensure cuvettes, syringes, and tips are completely clean and dry before use. See reverse side for tips on measuring liquids using syringes.
2. Press the ON/OFF button to turn the checker on. All segments will be displayed for a few seconds, followed by “Add”, “C.1” with “Press” blinking.
3. Preparing the cuvette for “C.1” measurements:

   • Place the syringe tips onto each syringe. Ensure the O-rings remain in the tip for a proper seal.

   • Use the 5 mL syringe with black printing to measure 4 mL of HI-783A-0 reagent. Ensure there is no excess reagent on the syringe tip, then slowly dispense the 4 mL of reagent into a clean, dry cuvette. If excessive reagent remains in the tip, draw a small amount of air into the syringe and use it to expel the remaining reagent into the cuvette.

   • Use the 5 mL syringe with blue printing to measure 5 mL of unreacted sample. Ensure there is no excess sample on the syringe tip, then slowly dispense the sample into the same cuvette. Ensure no sample is remaining in the tip.

   Note: The total liquid volume will be below the 10 mL mark at this step.

   • Screw the cap on and gently invert the cuvette 5 times, until the solution has been thoroughly mixed. Ensure there are no bubbles in the mixture and that the outside of the cuvette is dry and clean.

   • Insert the cuvette into the checker and close the cap.

   • Press the ON/OFF button. When the display shows “Add”, “C.2” with “Press” blinking, the checker is zeroed. Remove the cuvette.

4. Preparing the cuvette for “C.2” measurements:

   • Unscrew the cap and use HI-783IND-0 powder reagent as instructed into the cuvette. Screw the cap onto the cuvette. Gently invert the cuvette 5 times until the solution has been thoroughly mixed. For the most accurate reading, ensure there are no visible bubbles.

   • Insert the cuvette into the checker and close the cap.

5. Press ON/OFF button. The instrument displays the ppm of magnesium. The checker automatically turns off 10 minutes after reading.
6. Rinse cuvettes, caps, syringes, and tips thoroughly with deionized (RODI) water and allow to dry completely before storing.

The checker shows clear warning messages when erroneous conditions appear and when measured values are outside the expected range.

Accessories

Reagent Sets

• HI-783-25 Reagents for 25 Marine Magnesium tests

Other Accessories

• HI-783-11 Marine Magnesium certified standard kit
• HI-731315 Glass cuvette and cap for Checker®HC colorimeters (2 pcs.)
• HI-731318 Cloth for wiping cuvettes (4 pcs.)
• HI-740028P 1.5V AAA battery set (12 pcs.)
• HI-740143 1 mL graduated syringe (6 pcs.)
• HI-740144P Plastic pipette tip (6 pcs.)
• HI-740226 5 mL graduated syringe with black printing (1 pc.)
• HI-740237 5 mL graduated syringe with blue printing (1 pc.)
• HI-740274 Syringe replacement kit
• HI-93703-50 Cuvette cleaning solution, 230 mL