scope:

This CEN Workshop Agreement provides mine action programmes, demining companies and field operators with: - simple procedures to asses the effects of soils on the performance of metal detectors and dual sensors (see 5) and - clues to recognise soils that may create difficulties to metal detectors (see 5.6) and dual sensors (see 5.7). It also provides people designing tests to evaluate metal detectors or dual sensors with: - a list of soil properties to record that can affect the performance of these detectors (see 6.2), - procedures to determine these properties (see Annex B), - relative soil comparison rules to compare and choose soils for testing (see 6.4 and 6.5), and - soil classifications based on the effects on metal detector performance (see 6.3); no such classification is currently available for dual sensors. NOTE A CEN Workshop Agreement is an agreement developed by a Workshop, which reflects the consensus of the identified individuals and organizations responsible for its contents [5]. Therefore this document is not a standard, but an agreement reflecting the best practice and the state of knowledge at the time of its writing. This part of CWA 14747 complements the first part - which provides guidelines, principles and procedures for the testing and evaluation of metal detectors - by adding guidelines to characterise soils for both metal detectors and ground penetrating radars. First, methods to characterise soils during field operations using metal detectors or dual sensors are given in 5. These methods do not need additional instruments to measure soil properties. Then a description of how to characterise soils when testing and evaluating metal detectors or dual sensors is given in 6. A list of useful soil properties is provided and methods to measure or compute them can be found in Annex B. Table 1 lists the most important clauses: