Proceq PROFOSCOPE Operating Instructions Manual
PROFOSCOPE
OPERATING INSTRUCTIONS
Swiss Precision since 1954
Design Patent Pending
© 2015 Proceq SA 3
Contents
1. Safety and Liability ....................................................................5
1.1 Safety and Usage Precautions .............................................................. 5
1.2 Liability ................................................................................................... 5
1.3 Safety Instructions ................................................................................. 5
1.4 Designated Use ..................................................................................... 5
1.5 Labeling used in the Manual .................................................................. 5
2. Overview of the Profoscope .......................................................6
3. Tutorial ....................................................................................... 7
3.1 The Measurement Principle ................................................................... 7
3.2 Calibrated Measuring with Profoscope ................................................. 7
3.3 The Measuring Range ............................................................................ 8
3.4 Factors
Affecting
the
Measur
ement ............................................. 8
4. Getting Started ...........................................................................11
5. Performing a Real Test ............................................................... 12
5.1 Preparations .......................................................................................... 12
5.2 Locate a Rebar ...................................................................................... 13
5.3 Measure Cover Depth ............................................................................ 18
5.4 Measure Rebar Diameter ....................................................................... 22
6. Settings ...................................................................................... 24
6.1 Navigating through the Settings Menu .................................................. 24
6.2 Regional
Setting ............................................................................ 25
6.3 Rebar
Diameter ...........................................................................25
6.4 Measuring
Range
Selection .........................................................26
6.5 Audio
Setting ................................................................................ 26
6.6 Minimum
Cover ..............................................................................26
6.7 Neighboring
Bar
Compensation ....................................................27
6.8 Memory Function (for Profoscope+ only) .............................................. 27
7. Technical Specifications ............................................................ 29
4 © 2015 Proceq SA
8. Standards and Guidelines .......................................................... 30
8.1 Standards .............................................................................................. 30
8.2 Guidelines .............................................................................................. 30
9. Part Numbers and Accessories .................................................. 30
10. Maintenance and Support .......................................................... 31
10.1 Protective Cover and Batteries .............................................................. 31
10.2 Support Concept ................................................................................... 31
10.3 Standard Warranty and Extended Warranty .......................................... 31
11. Quick Reference Guide for ProfoLink (for Profoscope+ only) .... 31
11.1 Installation.............................................................................................. 31
11.2 Data Management and File structure: ................................................... 32
© 2015 Proceq SA 5
1. Safety and Liability
1.1 Safety and Usage Precautions
This manual contains important information on the safety, use and maintenance of the Profoscope.
Read through the manual carefully before the first use of the instrument. Keep the manual in a safe
place for future reference.
1.2 Liability
Our “General Terms and Conditions of Sale and Delivery” apply in all cases. Warranty and liability
claims arising from personal injury and damage to property cannot be upheld if they are due to one
or more of the following causes:
• Failure to use the instrument in accordance with its designated use as described in this manual.
• Incorrect performance check for operation and maintenance of the instrument and its components.
• Failure to adhere to the sections of the manual dealing with the performance check, operation
maintenance of the instrument and its components.
• Unauthorized structural modifications to the instrument and its components.
• Serious damage resulting from the effects of foreign bodies, accidents, vandalism and force
majeure.
All information contained in this documentation is presented in good faith and believed to be correct. Proceq SA makes no warranties and excludes all liability as to the completeness and/or accuracy of the information.
1.3 Safety Instructions
The instrument is not allowed to be operated by children or anyone under the influence of alcohol,
drugs or pharmaceutical preparations. Anyone who is not familiar with this manual must be supervised when using the instrument.
1.4 Designated Use
• The instrument is only to be used for its designated purpose as described in these operating
instructions.
• Replace faulty components only with original replacement parts from Proceq.
• Accessories should only be installed or connected to the instrument if they are expressly
authorized by Proceq. If other accessories are installed or connected to the instrument then
Proceq will accept no liability and the product guarantee is forfeit.
1.5 Labeling used in the Manual
NOTE! This symbol indicates important information.
6 © 2015 Proceq SA
2. Overview of the Profoscope
2
8
5
4
7
1
3
6
10
9
8
5
4
7
1 Display
2 Navigation
3 Reset Key
4 Measurement Center (MC)
5 LED Indicator
6 Function Key
7 On/Off Button
8 Battery Compartment
9 Center Line (CL)
10 Select Button
Fig 1: Profoscope set up
The Profoscope Display
11 12 13 14
15 16
17 18 19 20
11 Measuring Range (Standard, Auto)
12 Reference Rebar Diameter
13 Neighboring Rebar Correction Active
14 Minimum Cover Alert
1]
Active
15 Measuring Unit
16 Battery Status
17 Signal Strength (Increasing / Decreasing)
2]
18 Rifle Scope
19 Center Line
20 Measured Cover Depth
Fig 2: Profoscope display
1]
The minimum cover alert is automatically deactivated, when the memory function is set. One of
the three icons appears instead, see 6.8.
2]
The signal strength arrow is replaced by the measured bar diameter: e. g. when the Function
Key (6) for bar diameter is pressed.
© 2015 Proceq SA 7
3. Tutorial
3.1 The Measurement Principle
The Profoscope 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 electrically 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
Fig 3: Measurement principle
The Profoscope uses different coil arrangements to generate several magnetic fields. Advanced
signal processing allows
1. Localization of a rebar
2. Localization of the mid-point between rebars.
3. Determination of the
cover
4. Estimation of the bar diameter
This method is unaffected by all non conductive materials such as concrete*, wood, plastics,
bricks etc. However any kind of conductive materials within the magnetic
field
(approx. 400 mm /
16” sphere) will have an influence
on
the measurement.
* Some concrete types and other structural materials may have metallic content.
NOTE! Remove all metallic objects such as rings and watches before you start measuring.
3.2 Calibrated Measuring with Profoscope
The Profoscope is calibrated to measure on a normal rebar arrangement; 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 5.3.3 and 5.4.5). The following
information on accuracy, measuring ranges and resolutions refer to measurements on such normal
rebar arrangements.
8 © 2015 Proceq SA
3.3 The Measuring Range
The pulse induction principle used by Profoscope has defined operating ranges and accuracies.
The measuring range is dependent on the bar size. The expected accuracy of the cover measurement is indicated in the graphic below. (Complies with BS1881 part 204, for a single rebar with
sufficient spacing and known diameter).
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
5 10 15 20 25 30 35 40 45 50
55
7
6
5
4
3
2
1
#2 #3 #5
#6 #8 #9
#11 #13 #14 #16 #18
[inch] [mm]
Rebar size
Cover depth
Large
range
Standard
range
±4 mm / 0.16”
±3 mm / 0.12
”
±1 mm / 0.04”
±1 mm / 0.04”
measuring accuracy
[mm]
[1/16 inch]
7.5 / 185
4 / 100
2 / 50
[inch] / [mm]
0 / 0
Fig 4: Measuring ranges
3.4 Factors
Affecting
the
Measur
ement
3.4.1 Errors due to Neighboring Bars
All rebars within the sphere of influence affect the reading.
MC (4)
Sphere of influence diameter 400 mm / 16”
Any ferromagnetic material within the
sphere may have an influence on the
signal value (e.g. during a reset)
Fig 5: Influence area
NOTE! This effect can be reduced by the neighboring bar correction implemented in the
Profoscope.
© 2015 Proceq SA 9
3.4.2 Resolution
There is a limit to the minimum spacing of bars depending on the cover depth and rebar diameter.
It is impossible to distinguish between individual bars above these limits.
1
2
3
4
5
6
1
2
3
4
5
6
7
60
80
100
120
140
0
20
40
020406080100 120 140160 180
0
[inch]
[mm]
Cover depth
Large
range
Standard
range
Ø 40 mm
Ø 26 mm
Ø 16 mm # 5
Ø 12 mm
Below the curve:
Individual rebar can be detected
Rebar spacing
[inch]
[mm]
C
S
# 12
# 13
# 8
# 4
# 3
Fig 6: Resolution
3.4.3 Effect of Setting Incorrect Bar Diameter
The accuracy of the cover measurement is also dependent on setting the correct bar diameter.
The following chart gives an estimation of the error of the cover reading for different rebar sizes if a
default size of 16 mm / #5 is set.
NOTE! In case the diameter is not known and cannot be measured the rebars should
be exposed in one area to set the correct diameter in the Profoscope. With the correct
diameter set the cover over a single rebar can be measured with the accuracy shown in
chapter 3.3.
Ø 8 mm
# 2
10 © 2015 Proceq SA
-1
-½
0
½
1
1½
-10
0
10
20
30
40
020406080100 120140 160180
-50
-40
-30
-20
0 20
40
60
80
100
120
140
160
180
-1½
-2
[inch]
[mm]
Ø 6 mm
Ø 8 mm
Ø 16 mm
Ø 12 mm
Ø 20 mm
Ø 34 mm
Ø 40 mm
[inch]
Standard range
Large range
# 2
# 3
# 4
# 5
# 8
# 13
Real Cover
[mm]
Error of cover
Fig 7: Error values for covers measured with default diameter of 16 mm / # 5 set
3.4.4 Factors Affecting Diameter Determination
Two factors affect the determination of the rebar diameter. One is the cover depth. Diameter can be
determined for rebars with cover not exceeding 80% of the Standard range. 64 mm / 2.5”.
The second is the spacing between neighboring bars. For accurate determination of the diameter,
the spacing between the rebars must be greater than the limits shown in the drawing below with
reference to the MC (4).
S
2
S
1
S
1
>150 mm
>6
”
S
1
: 130 mm / 5.2” without Neighboring rebar correction
50 mm / 2.0” with Neighboring rebar correction (see 5.4.2)
S
2
: min. 150 mm / 6”
depending on the rebar diameter
Fig 8: Minimum rebar spacing for correct readings
# 6
# 11
Ø 26 mm
© 2015 Proceq SA 11
3.4.5 Orientation
The strongest signal results when the Center Line (9) of the probe is parallel to a bar. The Center Line
(9) in the Profoscope is the long axis of the instrument. This property is used to help determine the
orientation of the rebars (see 5.2.3).
4. Getting Started
A start-up test kit (two 16 mm / #5 diameter rebars) is provided with the packaging to help you
familiarize yourself with the instrument.
NOTE: Complete the tutorial or see a demo by a qualified Proceq representative.
1. Verify that there are no metal items on hands, fingers, or in the vicinity of the test area,
(e. g. steel frame of the table, metal trolleys etc.)
2. Power on: Press the On/Off Button (7)
on the
top
panel.
3. Reset the instrument with the Reset Key (3)
4. Check the location of the Measurement Center (MC) which indicates the center of the probe.
MC (4)
Fig 9: Measurement Center (MC)
5. Check the operation with the start-up test kit and confirm:
• The location and orientation of the rebars
• The position between two rebars
• Cover depths approximately 15 mm / 0.59 and 60 mm / 2.36”
• Diameter 16 mm / #5, see 3.4.1
Congratulations! Your new Profoscope is fully operational and you can now continue with your
measurements.
Performing a Reset
The pulse induction measuring principle is prone to drift with temperature and other external influences. Performing a reset corrects for any
drift and ensures accurate measurements. We recommend a reset every
5 minutes or so.
On power on, the Profoscope reminds the user to perform a reset.
Fig 10: Reset
Hold the Profoscope in free space (no metal within a 200 mm / 8” sphere) and press the Reset Key
(3)
. A circular arrow rotates on the display for approximately 2.5 seconds while the reset is car-
ried out.
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