Hanna Instruments HI 96704 - Manual (Page 5)

5
SPECIFICATIONS
PRECISION AND ACCURACY
Range 0 to 400
µ
g/L
Resolution 1
µ
g/L
Accuracy ±3% of full scale
Typical EMC Deviation ±2
µ
g/L
Light Source Light Emitting Diode
Light Detector Silicon Photocell with narrow band interference filter @ 466nm
Method Adaptation of the ASTM Manual of Water and Environmental Technology,
method D1385-88 for natural and treated water. The reaction between
hydrazine and the liquid reagent causes a yellow 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 93704-0 Liquid Reagent 2x12 drops
Precision Precision Precision Precision Precision is how closely repeated measurements
agree with each other. Precision is usually
expressed as standard deviation (SD).
Accuracy
Accuracy Accuracy Accuracy 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
100
µ
g/L hydrazine and a representative lot of
reagent, an operator obtained with a single
instrument a standard deviation of 3
µ
g/L.