MA-5950_EN.doc
Page 6 on 15
Rev: 29-03-19
2.7.
Output impedance
The Wheatstone bridge is made up of 350
Ω
gauges.
At the output signal (OUT+: green, OUT-: white), the resistance is 700
Ω
± 5
Ω
.
This impedance must be in accordance with the individual cell data sheet, which could easily be determined with a multimeter.
If a wider varying resistance is read, it means that there is a break-off or a short circuit current a resistance variation of several
ohms would instead be a consequence of a severe overvoltage problem.
2.8.
Input impedance
Input signal (IN+: brown, IN-: yellow): its resistance is usually of 700
Ω
± 5
Ω
, its impedance must be in accordance with
the individual cell data sheet. If a different resistance is read, it means that there is a break-off or a short circuit current. It
is at the input that one finds drift compensation, slope and sensitivity adjusted resistance.
Rm
Sensitivity drift compensation
Rms
Sensitivity drift adjustment
Rs
Sensitivity calibration
Rzb
Zero calibration
Rzc
Zero drift compensation