24
M
EASURING
DEPTH
OF
COVER
R
6.4 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 reading
u
.
•
The manually entered bar size has been confirmed as being accurate by comparing with the
autosize estimate.
If the reinforcement bar is too deep to measure successfully (over-range), the depth of cover will be
displayed as infinite (Figure 14).
Figure 14. Depth of cover over-range (infinite)
u.
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 64 for ordering details.
331.book Page 24 Thursday, March 12, 2009 9:46 PM
