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locate rebar.
Figure 3-36 Measuring line
1. Buzzer sounds.
At that time, the instrument prompts sensor goes over rebar,
then moving sensor in the opposite direction to find the
location of minimum value of current thickness—exact
location of rebar.
2. Signal value changes from small to big and then to small.
When sensor gradually approaches rebar, signal value
gradually becomes larger, or signal value becomes smaller.
Location of maximum is the exact position of rebar.
Signal value is the fundamental basis of measurement of
thickness of cover. When the change of thickness of cover is
within 1mm, the current thickness value will not change, but
signal value can reflects mini mal change. Therefore, according
to it, you can locate the exact position of rebar more accurately.
3. The current thickness value changes from big to small,
then to big.
When sensor approaches rebar, the current thickness value will
gradually changes to smaller, or the current thickness value
becomes bigger. Location of minimum thickness is the exact
location of rebar.
4. Scroll bar lengthens gradually, then shorten.
Operation manual of NOVASCAN-R800, R630, C310A
Novatest S.r.l.
www.novatest.it