Hanna Instruments HI 96728 - Manual (Page 5)

5
SPECIFICATIONS
PRECISION AND ACCURACY
Range 0.0 to 30.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.5 mg/L ±10% of reading@ 25°C
Typical EMC Deviation ±0.1 mg/L
Light Source Tungsten lamp
Light Detector Silicon Photocell with narrow band interference filter @ 525 nm
Method Adaptation of the cadmium reduction method. The reaction between nitrate-
nitrogen and the reagent causes an amber tint in the sample.
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 104 x 69 mm (7.6 x 4.1 x 2.7 ”)
Weight 360 g (12.7 oz.).
REQUIRED REAGENTS
Code
Description Quantity/test
HI 93728-0 Powder Reagent 1 packet
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
10.0 mg/L nitrate and a representative lot of
reagent, an operator obtained with a single
instrument a standard deviation of 0.3 mg/L.