PURPOSE: To easily and quickly measure the characteristic of a bridge circuit beforehand in the stage where an output adjusting element such as a temperature compensation resistance or the like is not mounted, without temporarily installing a measuring element such as a jumper wire or the like.
CONSTITUTION: A bridge circuit 10 has strain gauges 11, 12 mounted on a strain generating body 1 to generate load signals and, adjusting elements 13, 14 for adjusting the level of the load signals. In addition to input/output lead wires 15, 16 of the bridge circuit 10, there is provided a bypass wire 18 which detachably connects a connecting terminal 14a connected with the adjusting elements 13, 14 to a measuring element 21 of a preliminary measuring device 9. At the preparatory measurement, the measuring element 21 is connected to the connecting terminal 14a via the bypass wire 18, and therefore it becomes not necessary to temporarily install an element for measurement. Accordingly, the preparatory measurement can be easily and quickly performed.
UTSUNOMIYA MICHITO
NAITO KAZUFUMI
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