Determining the thickness of concrete protecting the steel.
Do you have the standard model or the 4SCAN model with data logging?
To estimate the bar diameter, place the diameter probe parallel to the bar's axis. The instrument records four measurements and calculates the average to accurately determine the bar diameter. For a single bar, the Profometer 4 can measure diameters up to 40 mm with an accuracy of ±2 mm .
is known for efficiency, but always carry spare 1.5V batteries to avoid downtime. proceq profometer 4 manual
⚠️ This guide is a summary. For safety, specifications, and detailed procedures (e.g., data export, software use), always refer to the manufacturer’s official manual.
The connection between the search head and the unit is the most common point of failure. Avoid tight kinks or pulling on the wire.
Imagine a structural engineer in the late 90s, standing on a bridge deck. They aren't just looking for rebar; they are trying to determine if the concrete cover is thick enough to prevent corrosion. At the time, the Profometer 4 was the gold standard for "Eddy Current" pulse induction. Determining the thickness of concrete protecting the steel
Concrete mixes containing magnetite, blast-furnace slag, or carbon fibers can distort magnetic fields. If working on specialized structures, verify readings by exposing a control rebar to calibrate the instrument to the specific concrete matrix. Tie Wires and Welded Wire Mesh
Toggle the audio switch back and forth; check headphone jack inputs for debris.
Small tie wires used to secure rebar cages can generate localized signal spikes. Scan smoothly and look for consistent, linear peaks rather than isolated, sharp fluctuations to differentiate structural rebars from tie wires. 5. Maintenance, Calibration, and Troubleshooting Routine Maintenance The instrument records four measurements and calculates the
What (bridge deck, columns, tunnels) are you currently testing?
Keep the probe face clean and free of abrasive concrete dust by wiping it down with a damp cloth after use. Never use harsh chemical solvents.
Eddy current meters are highly sensitive to external electromagnetic variables. Be aware of the following interference sources:
Scaffolding, tie wires, window frames, and personal protective equipment (like steel-toed boots or watches) must be kept away from the probe during scanning. 6. Maintenance, Storage, and Troubleshooting Troubleshooting Common Issues Potential Cause Corrective Action Instrument drifts from zero rapidly Low battery voltage or extreme temperature change
