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enter image description hereI am using JY-S60 Signal conditioner (SC) (click here to see datasheet, giving amazon link, could not find specific link for datasheet) with small load cell click to see load cell datasheet. I have connected the Vo and ground of SC to Labjack U3-HV (Click to see LabJack U3-HV datasheet) one channel and ground for measuring signal from small load cell (100g).

But when I check for signal, labjacks' acquired signal is not stable in 3rd decimal point which has to be stable for my experiment.

I was thinking if connecting GND(power -) and GNDD (shield) would give stable result? If I connect both ground, what exactly will happen? I do not want to damage the SC, that is why asking for help. Should I connect?

I have added schematics for reference.

Any idea how can I stabilize the signal and read load accurately?

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  • \$\begingroup\$ Links to datasheets? Schematic? \$\endgroup\$
    – Transistor
    Commented Jun 9, 2021 at 21:47
  • \$\begingroup\$ Please draw a diagram or include a schematic \$\endgroup\$
    – Voltage Spike ♦
    Commented Jun 9, 2021 at 22:08
  • \$\begingroup\$ Sample 10x or more and average. \$\endgroup\$
    – rdtsc
    Commented Jun 9, 2021 at 22:14

1 Answer 1

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No, you should not connect those two points (GND and GNDD.) That'll do you no good (though probably no harm.)

According to the Amazon page (that's not a datasheet,) the "GNDD" pin should be connected to the shield of the cable.

  • You should use a shielded cable to connect the JY-S60 to the load cell. Connect the GNDD pin to the shield. Do not connect the shield to the ground of the load cell. The shield should only be connected at one end.
  • You should use a shielded cable to connect the JY-S60 to the Labjack U3-HV. Connect the GNDD pin to the shield. Do not connect the shield to the ground of the Labjack U3-HV. The shield should only be connected at one end.

I don't know whether that will solve your signal problems.

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  • \$\begingroup\$ You need shielded cables to make use of GNDD. \$\endgroup\$
    – JRE
    Commented Jun 10, 2021 at 15:24

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