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Load cells

Load cells

Load cells

(OP)
I'm not sure which forum is the most appropriate for this topic?

I want to use an S-type load sensor (in tension), but am not familiar with them.

> Is the load intended to be applied to the U-shaped openings, with the tapped holes to be used for load-link retaining bolts?

> Is packaged circuitry readily available to provide an analog output of 0-5 volts DC that is directly proportional to the applied force?

Thanks

RE: Load cells

Read Compositepro's links and remember applications engineers are your friend.

RE: Load cells

(OP)
To clarify- I'm retired from an EE career, including work with strain gauges. What I "... have a lot to learn..." about is the typical load cells on the market, such as S-type configuration.
> Do they typically contain a Wheatstone bridge, or merely the piezo strain gauge?
> To obtain an analog 0-5 VDC output, are there pre-engineered circuits available for purchase?
Thanks

RE: Load cells

(OP)
Thanks Greg

RE: Load cells

Gosh, if you had even glanced at the links I gave you, you would have immediately seen what Greg just told you.

RE: Load cells

(OP)
I'm looking at using a PSD-S1 S-type load cell (from Walfront, 350 ohm in/out, 0-300 lb., in tension only) with a TI AD620 instrument amp (5v power from data logger, gain resistor set for 5V out @ 300 lb. load). My data logger allows scaling the output appropriately for my application. Does this sound workable?

Edit: Got my notes mixed up. AD620 is by Analog Devices Inc, not TI.
______And I forgot to ask if supplying the same +5V to both the in-amp and the bridge is okay?

RE: Load cells

(OP)
No need to answer my question- I'll power the amp with 12V and the bridge with 5V.

New question- Are S-type load cells made with mechanical internal stops to prevent over-stressing the strain gauges?
I wonder if I did harm by applying a 136 Kg force (tensile) to a 100 Kg-rated cell?

RE: Load cells

(OP)
Torque measurement system completed, calibrated, and tested. All is well- cell wasn't damaged by overload.
Thanks.

RE: Load cells

Thanks for the closure Jack.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Load cells

Overload capacity of load cells is typically at least 150% x FS.

je suis charlie

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