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Specifications precision and accuracy – Hanna Instruments HI 96704 User Manual

Page 5

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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.