• Turn the meter on by pressing the button. All
segments will be displayed. When the display
shows “
Add
”, “
C.1
” with “
Press
” blinking, the
meter is ready.
• Fill the cuvette with 10 mL of unreacted sample
and replace the cap. Place the cuvette into the
meter and close the meter’s cap.
• Press the button. When the display shows
“
Add
”, “
C.2
” with “
Press
” blinking the meter
is zeroed.
• Remove the cuvette from the meter and unscrew
the cap. Add the content of one packet of
HI721-0
reagent. Replace the cap and shake
gently for 2 minutes until the powder is
completely dissolved. Place the cuvette back
into the meter.
• Press and hold the button until the timer is
displayed on the LCD (the display will show
the countdown prior to the measurement) or,
alternatively, wait for 3 minutes and press the
button.
• The instrument directly displays the
concentration of iron in ppm. The meter
automatically turns off after 2 minutes.
HI7
1-0
2
Measurement Procedure
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
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.
Functional Description
Cover
Cuvette with cap
Cuvette holder
LCD Liquid Crystal Display
Operation Button
Errors and Warnings
Thank You
Thank you for choosing a Hanna Instruments product. Please read this instruction
manual carefully before using the instrument. For more information about Hanna
Instruments and our products, visit www.hannainst.com.
For technical support, contact your local Hanna Instruments Office or e-mail us
at [email protected].
Find your local Hanna Instruments Office on www.hannainst.com.
Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occurred during shipment, please contact your local Hanna Instruments Office.
Each
HI721
meter is supplied complete with:
• Sample Cuvettes and Caps (2 pcs.)
• Reagents for 6 tests
• 1.5V AAA Battery (1 pc.)
• Instruction Manual and Quick Reference Guide
Preliminary Examination
Range
0.00 to 5.00 ppm
Resolution
0.01 ppm
Accuracy
±0.04 ppm ±2% of reading @25 °C/77 °F
Light Source
Light Emitting Diode @525 nm
Light Detector
Silicon Photocell
Method
Adaptation of the Standard Methods for the Examination of Water and
Wastewater, 20
th
edition, 3500-Fe B, Phenanthroline method. The re-
action between iron and reagent causes an orange tint in the sample.
Environment
0 to 50 °C (32 to 122 °F); max 95% RH non-condesing
Battery Type
1.5V AAA (1 pc.)
Auto-Shut off
After 3 minutes of non-use and 2 minutes after reading
Dimensions
86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight
52 g (1.84 oz.)
Specifications
Hanna Instruments reserves the right to modify the design, construction or appearance of
its products without advance notice.
