Accuracy - Elcometer Protovale 331 Operating Instructions Manual

M
EASURING DEPTH OF COVER

6.3 Accuracy

The reading of cover will only be accurate if all the following conditions are
satisfied:
• The instrument has been zeroed.
• The search head is over the centre-line of the bar.
• The search head is parallel to the bar.
• The search head is not over, or near, any other bars which might affect the
f
reading .
If the reinforcement bar is too deep to measure successfully (over-range), the
depth of cover will be displayed as infinite (Figure 12).
Figure 12. Depth of cover over-range (infinite)
f. If reinforcement bars are too close together to measure with the standard search
head, try using the narrow pitch search head. See "Accessories" on page 36 for
ordering details.
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