Hanna Instruments HI 96713 - Manual (Page 5)

5
SPECIFICATIONS
PRECISION AND ACCURACY
Range 0.00 to 2.50 mg/L
Resolution 0.01 mg/L
Accuracy ±0.04 mg/L ± 4% of reading @ 25°C
Typical EMC Deviation ±0.01 mg/L
Light Source Tungsten lamp
Light Detector Silicon Photocell with narrow band interference filter @ 610 nm
Method Adaptation of the ascorbic acid method. The reaction between
phosphate and the reagent 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 93713-0 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
1.00 mg/L phosphate and a representative lot of
reagent, an operator obtained with a single
instrument a standard deviation of 0.03 mg/L.