Hanna Instruments HI 95729 - Manual (Page 5)

5
Range 0.00 to 2.00 mg/L
Resolution 0.01 mg/L
Precision ±0.03 mg/L @ 1.00 mg/L
Typical EMC Deviation ±0.01 mg/L
Light Source Tungsten lamp with narrow band interference filter @ 575 nm
Light Detector Silicon Photocell
Method Adaptation of the EPA method 340.1 and Standard Methods for
the Examination of Water and Wastewater, 20 th edition, SPADNS
method. The reaction between fluoride and the liquid reagent
causes a red tint in the sample.
Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing
Battery Type 1 x 9 volt
Auto-Shut off After 10' of non-use in measurement mode;
after 1 hour of non-use in calibration mode.
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.).
REQUIRED REAGENTS
Code
Description Quantity/test
HI 93729-0 Fluoride Reagent 4 mL (2 mL x 2)
Precision is how closely repeated measurements
agree with each other. Precision is usually expressed
as standard deviation (SD).
Accuracy is defined as the nearness of a test result to
the true value.
Although good precision suggests good accuracy,
precise results can be inaccurate. The figure explains
these definitions.
In a laboratory using a standard solution of 1.00
mg/L fluoride and a representative lot of reagents,
an operator obtained with a single instrument a
standard deviation of 0.03 mg/L.
SPECIFICATIONS
PRECISION AND ACCURACY
16
or
Note it is possible to interrupt calibration procedure at any time by pressing ON/OFF.
Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna
CAL CHECK
TM Standards, otherwise erroneous results will be obtained. For accurate Validation and
Calibration results, please perform test at room temperature: 18 to 25°C (64.5 to 77.0°F).
CALIBRATION PROCEDURE
• Turn the meter on by pressing ON/OFF.
When the LCD displays “729”, it is ready.
• Enter the calibration mode by holding CAL CHECK
for three seconds .
• The date of the last calibration appears (e.g.:
month “01”, day “08”). “F.CAL” means that
the factory calibration is selected.
Note: at this point it is possible to reset the
instrument to restore FACTORY CALIBRATION,
see instructions, page 18.
• Place the CAL CHECK TM Standard HI 95729-11
Cuvet A into the holder and ensure that the
notch on the cap is positioned securely into
the groove.
• Press ZERO and “SIP” will blink on the display.
• After a few seconds the display will show
“-0.0-”. The meter is now zeroed and ready for
calibration.
• Remove the cuvet.
• Place the CAL CHECK TM Standard HI 95729-11
Cuvet B into the holder and ensure that the
notch on the cap is positioned securely into
the groove.
CALIBRATION PROCEDURE