Draminski DOD2 - Page 20

19
EN
Observing the dierences in readings between stages 1
and 2 will help the beginner to become familiar with the
functioning of the device and understand the dierences
between particular animals.
– The functioning of the detector can also be checked as
follows:
a) place the tip of the probe in a container with clean wa
-
ter and perform a measurement cycle. The result will
be either very high or exceeding the range (“- - -” mes
-
sage) because water resistance is generally quite high.
In practice this does not happen because the electrical
resistance of the vaginal mucus is much lower than the
maximum detection range of the device.
b) add a pinch of salt to the water and mix thoroughly. Im
-
merse the tip of the probe and perform a measurement
cycle. Now the result should be much lower as salt low
-
ers the electrical resistance of the solution (lower resist-
ance = lower reading).
c) adding another pinch of salt will further reduce the
reading (during measurements, the probe should be in
a similar position inside the vessel).
This simple experience illustrates the function of the
detector and the phenomenon of an abnormal drop of
reading due to urine on the electrodes, as urine also con
-
tains salt.
SECTION 5 | NOTES TO THE MEASUREMENTS