• 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
HI708-0 reagent. Replace the cap and shake
gently until it 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 10 minutes and press the
button.
• The instrument displays concentration in ppm
of nitrite (NO ). To convert the displayed
concentration to nitrate - nitrogen (NO -N)
divide the reading by 3.29. To convert the
displayed concentration to sodium nitrite
(NaNO2) multiply the reading by 1.5.
The meter automatically turns off after
10 minutes.
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” 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.
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
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 HI708 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 to 150 ppm
Resolution 1 ppm
Accuracy ±3 ppm ±5% of reading @25 °C/77 °F
Light Source Light Emitting Diode @470 nm
Light Detector Silicon Photocell
Method
Adaptation of the Ferrous Sulfate method. The reaction between
nitrite and the reagent causes a greenish-brown 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 10 minutes of non-use
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
Cover
Cuvette with cap
Cuvette holder
LCD Liquid Crystal Display
Operation Button
Functional Description
Errors and Warnings
Measurement Procedure
Hanna Instruments reserves the right to modify the design, construction or appearance of
its products without advance notice.
