Hanna Instruments HI 96701C - Manual (Page 5)

5
SPECIFICATIONS
PRECISION AND ACCURACY
Range 0.00 to 5.00 mg/L
Resolution 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.50 mg/L
Accuracy ±0.03 mg/L ±3% of reading @ 25°C
Typical EMC Deviation ±0.01 mg/L
Light Source Tungsten lamp
Light Detector Silicon Photocell with narrow band interference filter @ 525nm
Method Adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G.
The reaction between free chlorine and the DPD reagent causes a pink
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 93701-0 DPD 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 chlorine and a representative lot of
reagent, an operator obtained with a single
instrument a standard deviation of 0.02 mg/L.