Notes on the electrical connection of inductive measuring probes

Observe the following instructions to achieve an optimum measurement result:

• The use of suitable low-capacitance cables is recommended. Depending on the measuring method, parasitic capacitances of the individual cables have a direct influence on the accuracy of the measurement result
• If separate cables are used for the secondary coils, it is recommended to connect two cables to a center tap as close as possible to the measuring probe, so that a 5-wire LVDT signal can be evaluated at the EL5072.
• For medium cable lengths it is usually sufficient to shield only the signal line of the secondary winding.
• For longer cable lengths (> 20 m) and in cases with strong interference, the supply cable for excitation of the primary coil and the cable of the secondary winding for measurement of the signal should be routed in separate shields
• As a general rule, the supply line and the signal line should not be routed in a multi-core, jointly shielded line.
• The shield should be placed over a large area using a shielding bracket.