Vaisala HM42 - Page 45

42
When measuring, for
example, from a wall so that
the probe is placed in a
horizontal position, make
sure the probe does not
bend: do not leave the
probe unsupported.
Always insert the probe at
least 4 cm inside the
structure from which you
are taking measurements.
Never leave the meter and
the handle hanging down
freely from the probe.