Q.seriesGantner Instruments Test & Measurement GmbH 454 Connection → Q.brixx A107: Connecting sensorsFig. 4-43 A107, measurement with full bridge; left: terminal ver-sion; right: D-sub sockets.4.10.7 Strain-gauge half and quarter bridgesFor the connection of strain-gauge half or quarter bridges youneed a special connecting plug which contains the completionresistances. The plug for the terminal version can be obtainedunder the designation Q.bloxx Terminal B14/120-A107 with120 or B14/350-A107 with 350 from Gantner Instruments Test &Measurement GmbH. An adapter plug is available for the versionwith D-sub sockets (Fig. 4-44).Fig. 4-44 Adapter plug for D-sub version.The bridge excitation voltage is 2.5 V.IMPORTANTFor strain-gauge quarter bridges the plug or the terminal musthave the same resistance values as the strain gauges used,because otherwise no measurement is possible. Strain-gauge halfbridges can also be connected with other resistance values.Fig. 4-45 A107, measurement with strain-gauge half bridge andquarter bridge using Q.bloxx Terminal B14 (terminal ver-sion).4, 93, 81, 6 (+)5, 10 (GND)721 (+)8 (GND)120 Ω 350 Ω3, 82, 71, 63, 82, 71, 63, 85, 102, 7
