Hanna Instruments HI 83740 - Manual (Page 5)

5
Range 0.00-1.50 mg/L
Resolution 0.05 mg/L
Precision SD ±0.05 mg/L @ 0.50 mg/L
Light Source Tungsten lamp with narrow band interference filter @ 560 nm
Light Detector Silicon Photocell
Method The reaction between Copper and the reagents causes a purple tint in
the sample.
Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing
Battery Type 4 x 1,5 volt AA batteries / 12 to 20 VDC through voltage adapter
Auto-Shut off After 15' of non-use in measurement mode.
Dimensions 225 x 85 x 80 mm (8.7 x 3.3 x 3.1")
Weight 500 g (17,6 oz.).
REQUIRED REAGENTS
Code Description Quantity/test
HI 83740A-0 Copper Reagent A 5 mL
HI 83740B-0 Copper Reagent B 5 mL
HI 83740C-0 Copper Reagent C 2 x 4 spoons
HI 83740D-0 Copper Reagent D 2 x 4 spoons
SPECIFICATIONS
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 0.50
mg/L copper and a representative lot of reagent, an
operator obtained with a single instrument a standard
deviation of 0.05 mg/L.
PRECISION AND ACCURACY
16
• Insert the zero (cuvet #1) into the holder and
close the lit.
#1
(Zero)
#2
(Sample)
• Press ZERO and “----” will blink on the display.
• After a few seconds the display will show “-0.0-”. The
meter is now zeroed and ready for measurement
Note:
If the “L Lo” (Low Light) message appears, the sample
must be diluted. See “General tips for an accurate
measurement” (page 12).
• Remove the cuvet from the instrument.
• Insert the reacted sample (cuvet #2) into the holder
and close the lid.
• Press READ and the display will show “----” during
measurement.
• The instrument directly displays concentration in mg/L
(ppm) of copper on the Liquid Crystal Display.
Note:
If the copper concentration exceeds 1.50 ppm or if
the sample is very turbid or dark red colored, it is
recommended to dilute the sample 10 times with
HI 83742-1 Wine Solvent-1 and repeat the
complete measurement procedure starting from the
beginning, taking 15 mL of diluted wine sample in
vial #1 for zero-sampling and 15 mL in vial #2
for reading. In this case the displayed value needs
to be multiplied by 10 to compensate for dilution.