Hanna Instruments HI 739 User manual

HI 739 Fluoride High Range
Quick Reference Guide
www.hannainst.com
TECHNICAL SPECIFICATIONS
•Range:0.0 to 20.0 ppm
•Resolution:0.1 ppm
•Accuracy:±0.5 ppm ±5 % of reading @ 25 °C / 77 °F
•Typical EMC Dev.:±0.1 ppm
•Light Source:Light Emitting Diode @ 575 nm
•Light Detector:Silicon Photocell
•Method:Adaptation of the Standard Methods for the Examination of
Water and Wastewater, 18th edition
, SPADNS method.
•Environmental:0 to 50 °C (32 to 122 °F);
max 95% RH non-condensing
•Battery Type:1 x 1.5V AAA
•Auto-Shut off:After 10 minutes of non-use
•Dimensions:81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5 ”)
•Weight:64 g (2.25 oz.)
TIPS FOR AN ACCURATE MEASUREMENT
•It is important that the sample does not contain any debris.
•Whenever the cuvette is placed into the measurement cell, it must bedry outside, and
completely free of fingerprints, oil and dirt. Wipe it thoroughly with HI 731318 or a lint-
free cloth prior to insertion.
•Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate
measurements, remove bubbles by swirling or by gently tapping the cuvette.
•Do not let the reacted sample stand for too long after reagent is added, as accuracy will
be affected.
•After the reading it is important to immediately discard the sample, otherwise the glass
might become permanently stained.

QR739 11/11
TAKING MEASUREMENTS
•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.
•Using supplied syringe add 2 mL (1 mL
twice) of HI 739AS reagent to the cuvette
and use the pipette to fill the cuvette up to
the mark with HI 739BS reagent.
•Replace the cap and invert several times to
mix.
•Place the cuvette into the meter and close
the meter’s cap.
•Press and hold the button until the timer is
displayed on the LCD. Alternatively wait for
one minute and then 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. Using the unused syringe,
add exactly 1.00 mL of sample.
•Replace the cap and invert several times to
mix.
•Place the cuvette back into the meter.
•Press and hold the button until the timer is
displayed on the LCD. Alternatively wait for
one minute and then press the button.
•The instrument directly displays the
concentration of fluoride in ppm.
The meter automatically turns off after 10
minutes.
Note:For error messages and battery replacement see the instruction manual.
10 mL
2x