Hanna Instruments HI 96760 - Manual (Page 6)

10 11
The instructions listed below should be carefully followed during testing to ensure best accuracy.
• Use matched square cuvettes, having 4 clear faces and 10
mm path length.
• Do not touch the cuvette walls with hands.
• Whenever the cuvette is placed into the measurement cell, it
must be dry outside, and completely free of fingerprints, oil
or dirt. Wipe it thoroughly with
HI 731318 or a lint-free
cloth prior to insertion.
• It is important that the sample does not contain any debris. This
would corrupt the reading.
• Samples should be completely free of air bubbles. If bubbles are present, let the samples
stand until air bubbles have completely disappeared (not more than 30 minutes, see note
below).
• It is recommended to take the sample of maple syrup in the middle of the container.
• It is recommended to take and analyze samples at room temperature.
• Do not use the same cuvette with glycerol for more than 5-10 times to perform calibration
and dispose of it after 1 day has passed.
• Never re-use maple syrup sample cuvettes, dispose of them after use.
• Use one syringe for glycerol, and the other one for syrup in order to avoid contamination.
Note: Maple Syrup samples exposed to direct sun light and/or air will darken over time. This
is caused by microorganisms.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
Over Range: A flashing value of the maximum concentration
indicates an over range condition. The concentration of the
sample is beyond the programmed range: dilute the sample and
re-run the test.
Cap error: Appears when external light enters in the analysis
cell. Assure that the cuvette cap is present.
Cooling lamp: The instrument waits for the lamp to cool down.
d) other errors and warnings
Battery low: The battery must be replaced soon.
Dead battery: This indicates that the battery is dead and must
be replaced. Once this indication is displayed, the meter will
lock up. Change the battery and restart the meter.