| 摘要 |
In a method of measuring the tensile stressing of a moving web, force transducers (7) in the form of a Wheatstone bridge (11) are connected up. An amplifier (18) amplifies a diagonal voltage (17) of the Wheatstone bridge (11). In order for it to be possible to detect whether at least one of the force transducers (7) is defective, the Wheatstone bridge (11) can be loaded by means of at least one resistance (26) by way of at least one switch (24, 25). Comparing the measured values for the loaded state with those for the non-loaded state determines whether the force transducers (7) of the Wheatstone bridge (11) are capable of functioning. Otherwise, an active error signal (28) is emitted. ® KIPO & WIPO 2009
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