Hanna Instruments HI 721 - User Manual

Iron High Range
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 721 meter is supplied complete with:
• Two Sample Cuvettes and Caps
• Six powder reagents for Iron High Range
• 1 x 1.5V AAA Battery
• Instruction Manual
HI 721
Technical specifications:
Range 0.00 to 5.00 ppm
Resolution 0.01 ppm
Precision ±0.04 ppm ±2% of reading @ 25°C
Typical EMC Dev. ±0.01 ppm
Light Source Light Emitting Diode @ 525 nm
Light Detector Silicon Photocell
Method Adaptation of the EPA Phenantroline method 315B,
for natural and treated waters. The reaction between
iron and reagent causes an orange tint in the sample.
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 2 minutes of non-use and 10 seconds after reading.
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 “0.00” 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
an over range condition. The concentration of the sample is beyond
the programmed 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, the meter will lock up.
Change the battery and restart the meter.
1. Cuvette cap.
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

Hanna Instruments HI 721 Specifications

General

Brand	Hanna Instruments
Model	HI 721
Category	Measuring Instruments
Language	English

Summary

Functional Description

Cuvette Cap

Cap for the sample cuvette.

Cuvette with Cap

The sample cuvette with its cap.

Cuvette Holder

Holder for the cuvette within the instrument.

Liquid Crystal Display

The instrument's digital display screen.

Button

The single button used for instrument operation.

Errors and Warnings

Light High Error

Too much light for measurement; check zero cuvette.

Light Low Error

Insufficient light for measurement; check zero cuvette.

Inverted Cuvettes

Sample and zero cuvettes were swapped.

Under Range

Sample absorbs less light than zero; check procedure.

Over Range

Sample concentration exceeds the programmed range.

Battery Low Warning

Indicates the battery needs replacement soon.

Dead Battery

Battery is dead; must be replaced to continue operation.

Measurement Procedure

Powering On

Turn the meter on by pressing the button.

Sample Preparation

Fill the cuvette with sample and place it in the meter.

Zeroing the Meter

Press button to zero the meter after sample addition.

Reagent Addition

Add reagent, shake, and reinsert cuvette.

Initiating Measurement

Press button to start timer or wait for automatic reading.

Automatic Shut-off

Meter automatically turns off after reading.

Measurement Tips and Battery Management

Sample Clarity

Ensure the sample does not contain debris.

Cuvette Cleanliness

Wipe cuvette clean and free of fingerprints.

Bubble Removal

Remove bubbles by swirling or tapping.

Reagent Reaction Time

Do not let reacted sample stand for too long.

Glass Staining Prevention

Discard sample immediately to prevent staining.

Battery Life and Indicators

Details on battery life and low battery warnings.

Battery Replacement

Procedure for replacing the instrument's battery.

Accessories and Recommendations

Reagent Sets

Reagents for 25 Iron High Range tests.

Other Accessories List

Includes batteries, cuvette tissues, and cleaning solutions.

User Recommendations

Advice on application suitability and interference correction.

Safety Warnings

Precautions against microwave use and hazardous environments.

Product Modification Notice

Hanna Instruments reserves the right to modify products.