Elcometer 331 SH Operating Instructions Manual page 61

Concrete covermeter

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EARCH HEADS

Figure 33. Borehole probe search fields

The body of the probe has a scale marked every 10 mm (0.5") along its length. Use this scale to

measure the depth of reinforcement bars located to one side of the hole. The scale indicates

distance from the centre of the sideways looking sensor in the probe. To measure the depth of the

borehole, add 15 mm (0.6") to the reading taken from the scale.

The sideways looking search field is located on the side of the Borehole Probe marked with the

scale.

Note: Orthogonal sizing is not possible with the Borehole Probe and the SIZE function is therefore

removed from the reading screen when this type of probe is connected to the Covermeter.

To scan for reinforcement bars to the side of the borehole: Set the switch to the sideways

looking position and move the Borehole Probe into the drilled hole, slowly rotating the probe through

360° (Figure 34 overleaf).

To scan for reinforcement bars or ducts in line with (in front of) the end of the borehole: Set

the switch to the forward looking position and push the Borehole Probe into the drilled hole slowly.

Figure 34. Scanning a borehole

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