Amphenol BLD7754-PTE, Instruction Manual, Page: 21 / 30

14
INS7750 Rev. A
Protimeter Hygromaster2 Instruction Manual
5. Diagnostic Procedure Guidelines
When diagnosing dampness in buildings, three key criteria must be
considered, as outlined in
Table 5
below.
Table 5: Diagnostic Criteria
Item Criteria Notes
2 Is the surface
temperature of
a wall or other
building element
above or below
the dew point?
Dew point is the temperature at which a
given quantity of air becomes saturated
(100% RH) and forms dew, or condensation.
If a surface is colder than the dew point,
condensation occurs. When the Protimeter
Hygromaster2 Condensator Mode is selected
to measure TDIFF (the proximity of a surface
to the dew point) the instrument identifies
either a
NO CONDENSATION
Condition, an
AT RISK
condition, or a
CONDENSATION
occurring condition
3 Is a wall
surface or other
building element
contaminated
with hygroscopic
salts or other
conductive
material?
Artificially high moisture meter readings may
be obtained either in material that has been
heavily contaminated by hygroscopic salts
or in materials that are conductive by na-
ture. The presence or absence of nitrates and
chlorides should be established when inves-
tigating suspected rising dampness situations
in particular.