Specifications precision and accuracy – Hanna Instruments HI 96704 User 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.