Pawkit
Operation
24
Pawkit’s sensor can be damaged by long term expo-
sure to high concentrations of ethyl alcohol. Read-
ing samples with alcohol concentrations above
about 10% can shift the calibration. If the instrument
is used to read water activity of extracts and other
samples with high alcohol concentrations, the cali-
bration should be checked frequently to make sure
the readings are accurate. Effects on the sensor can
be reduced by removing the sample immediately
after reading and allowing the Pawkit to stand open
for a time between readings to allow the alcohol to
diffuse out of the sensor chamber, or by measuring
a cup of activated charcoal.
Pawkit and Temperature
Pawkit makes its most accurate measurements when
the sample and instrument temperatures are within
1°C. If the sample is too warm, the thermometer
icon on the left of the screen will appear:
You will see the “mercury” go up the thermometer
and pop out of the top, and the instrument will
beep, indicating that the sample’s temperature is too
high and there is danger of condensing water in the
0.89
24.6
C
a
W
