Hanna Instruments HI 96706C - Manual (Page 5)

5
SPECIFICATIONS
PRECISION AND ACCURACY
Range 0.0 to 15.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.3 mg/L ±4% of reading @ 25°C
Typical EMC Deviation ±0.2 mg/L
Light Source Tungsten lamp
Light Detector Silicon Photocell with narrow band interference filter @ 525 nm
Method Amino Acid Method, adapted from Standard Method for the Examination
of Water and Wastewater. The reaction between phosphorus and the
reagents causes a blue 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 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 93706A-0 Phosphorus Reagent A (Molybdate) 10 drops
HI 93706B-0 Phosphorus Reagent B (Amino Acid) 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
6.00 mg/L phosphorus and a representative lot
of reagents, an operator obtained with a single
instrument a standard deviation of 0.2 mg/L.