Autosizing - Elcometer 331 SH Operating Instructions Manual

R
A S
UTO IZING

8 AUTOSIZING

Your Covermeter includes AutoSize - a feature which automatically calculates an estimate of the
size of a reinforcement bar and the depth of cover. The autosize estimated values are displayed on
the reading screen in a small font size alongside standard readings.
Bar size Depth of cover
Figure 15. Autosize bar size estimate and depth of cover
You do not need to configure anything to use autosize; just switch it on and off as required.
MENU / SETUP / DISPLAY / SHOW AUTOSIZE INFO
The values of bar size and depth of cover provided by autosize are estimates only and are
independent of the value of bar size you have entered.
The autosize bar size estimate is typically used as a check that the value of bar size entered
manually is accurate. If the two values are significantly different, you should use the orthogonal
SIZE feature to determine accurately the bar size - see "Measuring size of reinforcement bars
(orthogonal)" on page 27.
When the search head is not directly over a reinforcement bar, the autosizing values are
meaningless and should be ignored.
If the signal is too small the autosize and autosize cover readings are blanked (-- displayed).
In congested situations, autosizing will tend to over-estimate bar diameter, correctly reflecting the
fact that there is a greater mass of metal present than a single bar. Nevertheless, autosizing will
continue to give an essentially correct value for the cover.
In the case of lapped bars, autosizing will typically show double the true diameter of a single bar,
but the correct cover, which is generally the desired result.
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