Error Analysis; Fig. 140 Max. Absolute Measuring Error For Each Measuring Range, Full Logarithmic Diagram - Beckhoff EL3692 Documentation

Commissioning
5.7.5

Error analysis

The main difference between the EL3692 and other analog EL3xxx input terminals from Beckhoff is the fact
that it has not just 1, but 9 consecutive measuring ranges.
This opens up new aspects for error and measurement uncertainty analysis.
The absolute measuring error of the EL3692 with 4-wire connection is <0.5% relative to the respective full-
scale value.
The thus assured maximum absolute error (relative to the respective full-scale value) is specified as the
upper error limit below.
Fig. 140: Max. absolute measuring error for each measuring range, full logarithmic diagram
Example: Measurement of 50 Ω in the range 10-100 Ω --> maximum error: 0.5 Ω
This upper error limit results in the following values for the maximum relative measuring error relative to the
current measured value (logarithmic diagram).
118 Version: 2.1 EL3692