Gantner Q Series - Strain-Gauge Half and Quarter Bridges

Vers. No. 6.1
68 Released: 25/04/2017
4 Connecting the modules → Q.bloxx A107: Connecting sensors
Fig. 4-58 A107, measurement with full bridges.
4.14.7 Strain-gauge half and quarter bridges
For the connection of strain-gauge half or quarter bridges you
need a special connecting plug which contains the completion
resistances. The plug can be obtained under the designation
Q.bloxx Terminal B4/120-A107 with120  or B4/350-A107 with
35
0  from Gantner Instruments GmbH.
T
he bridge excitation voltage is 2.5 V.
IMPORTANT
For strain-gauge quarter bridges the plug must have the same
resistance values as the strain gauges used, because otherwise
no measurement is possible.

Since, for reasons of stability, all necessary completion resis-
tances are located in the Q.bloxx Terminal, you have to select a
full bridge circuit as the bridge type for the channel.
Fig. 4-59 A107, measurement with strain-gauge half bridge and
quarter bridge using Q.bloxx Terminal B4.
4, 9
3, 8
1, 6 (+)
5, 10 (GND)
120 Ω
350 Ω
3, 8
2, 7
1, 6
3, 8
2, 7
1, 6
3, 8
5, 10
2, 7