Modes Of Operation
The RWS (Roof and Wall Moisture Scanner) has two
operating modes, each with two ranges of sensitivity.
EIFS Mode (Yellow LED selected on MODE switch.)
is for moisture scanning of exterior insulation and fin-
ish system (EIFS) and similar type of construction
cladding as well as polyurethane and polystyrene foam
insulation and other types of low-density insulation sys-
tems applied to the building envelope.
Roof Mode (Red LED selected on MODE switch) is for
moisture scanning and leak tracing of built-up and sin-
gle ply roofing systems.
Each of these measurement modes incorporates two
sensitivities, which are activated by pressing the
RANGE switch:
Yellow LED for lower sensitivity and lower penetra-
tion. Red LED for higher sensitivity and deeper pene-
tration.
How It Works
The R.W.S. is an electronic instrument powered by one
9volt PP3 or similar battery. It operates on the princi-
pal of electrical impedance measurement. This means
that a harmless, low frequency, non-destructive signal
is sent from the two rubber coated electrodes at the base
of the instrument through the surface of the material
being tested, deep into this material. See Figure 2.
Fig. 2. RWS Low Frequency Signals On EIFS
R.W.S.
User Guide
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