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Iron High Range

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 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”.

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