• 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 one cuvette up to the 10 mL mark with
deionized water and replace the cap. This is
the blank.
• Place the blank 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.
• Fill second cuvette up to the 10 mL mark with
unfiltered sample and replace the cap. This is
the apparent color.
• Insert the apparent color cuvette into the meter
and close the meter’s cap.
• Press the button and the meter directly displays
the value of apparent color.
• Remove the cuvette and press the button twice
to restart the meter.
• Filter 50 mL of sample through a 0.45
µ
m
membrane filter into a beaker.
• After measuring of apparent color rinse the
cuvette three times with filtered sample and
then fill it up to the 10 mL mark with the
filtered sample and replace the cap. This is
the true color.
• Follow the procedure above to re-zero the meter
using the blank cuvette.
• Insert the true color cuvette into the instrument.
• Press the button and the meter directly displays
concentration in color units of the true color on
the LCD. The meter automatically turns off after
2 minutes.
Measurement Procedure
Hanna Instruments reserves the right to modify the design, construction or appearance of
its products without advance notice.
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.
Cover
Cuvette with cap
Cuvette holder
LCD Liquid Crystal Display
Operation Button
Functional Description
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
HI727
meter is supplied complete with:
• Sample Cuvettes and Caps (2 pcs.)
• 1.5V AAA Battery (1 pc.)
• Instruction Manual and Quick Reference Guide
Preliminary Examination
Range
0 to 500 g/L PCU
Resolution
5 PCU
Accuracy
±10 PCU ±5% of reading @25 °C/77 °F
Light Source
Light Emitting Diode @470 nm
Light Detector
Silicon Photocell
Method
Adaptation of the Standard Methods for the Examination of Water
and Wastewater 21
th
edition, Colorimetric Platinum Cobalt method.
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 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
