Proceq Pprofometer 600 User Manual (English)

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3. Profometer 6 Cover Meter

3.1 Measuring Principle

3.1.1. Pulse induction

The Profometer 6 uses electromagnetic pulse induction technology to

detect rebars. Coils in the probe are periodically charged by current

pulses and thus generate a magnetic ﬁeld. On the surface of any electri-

cally conductive material which is in the magnetic ﬁeld, eddy currents are

produced. They induce a magnetic ﬁeld in the opposite direction. The

resulting change in voltage can be utilized for the measurement.

Coils

Concrete

Rebar

Magnetic Field

Figure 2: Measurement principle

The Profometer 6 uses different coil arrangements to generate several

magnetic ﬁelds. Advanced signal processing allows locating a rebar as

well as measuring of cover and rebar diameter.

This method is unaffected by all non conductive materials such as con-

crete, wood, plastics, bricks etc. However any kind of conductive materi-

als within the magnetic ﬁeld (sphere of approx. 200 mm / 8 inch radius)

will have an inﬂuence on the measurement.

NOTE! Remove all metallic objects such as rings and watch-

es before you start measuring.

3.1.2. Calibrated Measuring with Profometer 6

The Profometer 6 is calibrated to measure on a normal rebar arrange-

ment; which is an arrangement of non-stainless steel rebars fastened

with binding wires only e. g. when measuring on welded mesh wires the

cover and diameter readings must be corrected (see “3.2.4. Practical

Hints”). The following information on accuracy, measuring ranges and

resolutions refer to measurements on normal rebar arrangements.

3.1.3. The

Measuring

Range

The measuring range is dependent on the bar size. The expected ac-

curacy of the cover measurement is indicated in the graphic below. It

complies with BS1881 part 204, for a single rebar with sufﬁcient spacing.

100

110

120

130

140

150

160

170

180

190

5 10 15 20 25 30 35 40 45 50 55

#2 #3 #5

#6 #8 #9

#11 #13 #14 #16 #18

[inch] [mm]

Rebar size

Cover depth

Spot probe

measuring range

Standard

measuring range

±4 mm

±2 mm

±1 mm

[mm]

[

inch]

153 mm

50 mm

Large

measuring range

measuring

accuray

185 mm

100 mm

Figure 3: Measuring ranges and accuracy: up to the indicated limits the

cover is measured and displayed. In the Locating Mode a rebar

is shown. In the Single-Line Mode the cover curve is shown but

a rebar is only set up to 90 % of the maximum cover.

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Proceq Pprofometer 600 Specifications

General

Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +60°C
Battery Life	Up to 8 hours
IP Rating	IP54
Cover measurement range	Up to 185 mm
Bar diameter measurement range	6 mm to 50 mm
Accuracy of cover measurement	±1 to 4 mm depending on cover depth
Display	Color touchscreen
Data storage	Internal memory
Data transfer	USB
Power supply	Rechargeable Li-ion battery
Accuracy	±1 mm to ±5 mm (cover)
Connectivity	USB