Hanna Instruments HI 83746 - Manual (Page 8)

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• After a few seconds the display will show “-0.0-”.
The meter is now zeroed and ready for measurement.
Remove the Blank Vial.
• Insert the Sample Vial into the instrument.
Note: Do not shake or invert the Sample Vial
anymore otherwise the samples may become turbid.
• Press READ and the display will show “----” during
measurement.
• The instrument directly displays concentration in g/L
(ppt) of Reducing Sugars on the Liquid Crystal Display.
Sample
• Insert the vials into the reactor and heat them for 7
minutes at 105°C.
Note: to obtain most accurate results, it is
recommended to use the pre-programmed timer of
the instrument, and remove the vials from the reactor
after exactly 7 minutes.
Turn the meter on by pressing ON/OFF and then
press TIMER to activate a 7 minutes countdown.
• At the end of the digestion period switch off the reactor,
place the vials carefully in the test tube rack and wait
for 10 minutes.
Warning: as the vials are still hot, be careful in
handling them.
• Invert the vials two times to mix. Then wait for 30
minutes to allow the vials cool to room temperature.
Note: This operation is necessary to recover the
condensed water after heating.
• Turn the instrument ON by pressing ON/OFF. When the
LCD displays “---”, it is ready.
• Place the Blank Vial into the instrument.
• Press ZERO and “----” will blink on the display.
Blank
Note
To convert the Reducing Sugars concentration from g/L to %, multiply the reading by 0.1.
e.g. 12.5g/L x 0.1=1.25%.
To calculate the potential alcohol degree multiply the read sugar concentration (g/L)
by 0.06.
e.g. 175g/L x 0.06=10.5% vol (potential alcohol degree)