Hanna Instruments HI 83746, Instruction Manual, Page: 5 / 10

5
Range 0.00-50.00 g/L
Resolution 0.25 g/L
Precision ±0.50 @ 10.00 g/L
Light Source Tungsten lamp with narrow band interference filter @ 610 nm
Light Detector Silicon Photocell
Method Fehling Method
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
Dimensions 224 x 87 x 77 mm (8.7 x 3.3 x 3.1")
Weight 512 g (17,6 oz.)
REQUIRED REAGENTS
Code Description Quantity/test
HI 83746A-0 Fehling solution A 1 vial
HI 83746B-0 Fehling solution B 1 mL
OPTIONAL REAGENTS
Code Description Quantity/test
HI 93703-59 Charcoal 2 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 10.00 g/L of
Reducing Sugars and a representative lot of reagent,
an operator obtained with a single instrument a
standard deviation of ±0.50 g/L
.
PRECISION AND ACCURACY
16
If the expected RS concentration is less than 5.00 g/L please refer to the instructions below:
• Remove the cap from two vials HI 83746A-0 Fehling
Solution A.
• Use the HI 731341 1000 µL automatic pipette to add
exactly 1 mL (=1000 µL) of HI 83746B-0 Fehling
Solution B to each vial.
For a correct use of the automatic pipette please
follow the related Instruction Sheet.
• Use the HI 731341 1000 µL automatic pipette to add
exactly 1 mL (=1000 µL) of wine sample to one vial
(Sample) and 1 mL of deionized water to the other
vial (Blank).
• Replace the cap and invert the vials several times to
mix. Wipe the vials thoroughly with a lint-free cloth.
• Proceed with instructions on page 14 and 15.
• The concentration displayed on the LCD must then be
divided by 4 by 4 by 4 by 4 by 4 to obtain the correct value in g/L (ppt) of
Reducing Sugar.
wine
sample
deionized
water
Sample
Blank
• Preheat the Hanna Reactor HI 839800 to 105 °C
(221°F). For a correct use of the reactor follow the
Reactor Instruction Manual.
Use of the optional
HI 740217 safety shield is
recommended.
Do not use an oven or microwave.
1 mL
1 mL
1 mL
1 mL