5
SPECIFICATIONS
PRECISION AND ACCURACY
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
Light Detector
Silicon Photocell with narrow band interference filter @ 575nm
Method
Adaptation of the EPA method 340.1 and Standard Methods for the
Examination of Water and Wastewater, 20
th
edition, SPANDS 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
;
with last reading reminder.
Dimensions
192 x 102 x 67 mm (7.6 x 4 x 2.6")
Weight
290 g (10 oz.).
REQUIRED REAGENTS
Code
Description
Quantity/test
HI 93729-0
Fluoride Reagent
4 mL (2 mL
×
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.
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