YATO YT-73138 Manual Original página 14

GB
Place the detector on the test surface, do not move it or change the pressure until the detection
symbol stops fl ashing, and the green indicator lamp illuminates. The detector calibration process
is complete. Slowly move the detector over the test surface. If a wooden element is detected, the
indication in the form of a measurement ladder will increase its amplitude, and the percentage
indicator will increase its value.
At the point where the measurement indicator will show the highest value, the wooden element
is located exactly below the detector sensor. If a wooden element is detected, an audible signal
is emitted.
When moving the instrument sideways, a cross indicator will appear, indicating that the detected
wooden element is located below the sensor centre.
CAUTION! When moving the detector, do not detach it from the test surface. All detector feet
must be in contact with the test surface.
CAUTION! If while moving the detector, the detection symbol starts to fl ash, stop the detector
until the indicator stops fl ashing.
CAUTION! Metal elements, which are located at a depth of 25 to 50 mm, can be detected while
detecting wooden elements. In this case, switch the detector to the metal detection mode and
make sure that metal elements are present. During the detection of wooden elements, live wires
may also be detected. This will be indicated by an indicator on display.
Detecting live wires
The detector can indicate the location of the live wires through which 50 Hz or 60 Hz alternating
current fl ows. Other wires can only be detected as metal elements.
Place the detector on the test surface so that it adheres to it with the underside. Press the live wire
detection button. The symbol visible on the button will appear on display. If a live wire is detected,
the indication in the form of a measurement ladder will increase its amplitude, and the percentage
indicator will increase its value.
At the point where the measurement indicator will show the highest value, the live wire is located
exactly below the detector sensor.
CAUTION! Due to the high sensitivity of the measurement, when the wall is thin, or the humidity
level is too high, the detection area may seem much larger than the actual location. To narrow
the detection, reduce the measurement sensitivity. Simultaneously press the live wire detection
and HOLD buttons, until a satisfactory sensitivity is visible on display. The device allows setting
one of the four sensitivity levels. The sensitivity will be restored to the highest level when the
instrument is restarted.
A live wire indicator may appear on the display when detecting both metal and wooden elements.
If the indicator appears, move the device several times over the place, where a live wire may be
present. Observe the indicator amplitude. The live wire is present in the place, which has the
highest reading value. If a live wire is detected, the red indicator lamp will illuminate, and the
audible signal will be emitted.
Live wires are the easiest to detect if the current is actually fl owing through them. To do this, turn
on the electricity receivers.
CAUTION! In some cases, for example, if the wires are placed behind a metal or damp surface,
they cannot be detected accurately. In this case, use the metal detection mode.
CAUTION! In the case of shielded wires, detection of live wires may prove ineff ective. Wires such
as a computer twisted pair or braided wires will not be detected.
CAUTION! It may happen that live wires will be detected all the time, even after reducing the
sensitivity. This may mean that the humidity level at the measurement site is too high or the
electrostatic level is too high. The eff ect of the electrostatic fi eld can be reduced by placing the
other hand on the test surface.
Humidity measurement
CAUTION! The relative humidity measurement probes are very sharp. Be careful when working
with uncovered probes. Always cover the measurement probes when performing measurements
other than relative humidity measurement.
Remove the measurement probes cover and place them gently on the test surface. Do not use
excessive force.
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O R I G I N A L I N S T R U C T I O N S