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how to know the loadcell is damage？

4/15/2012 2:01 PM	Rate (0)
weighting Posts: 17 Rating: (0)	when i use siwarex MS FTC FTA ,how i to know the loadcell is damage？ thank you
weighting Posts: 17 Rating: (0)	Last edited by: weighting at: 4/15/2012 2:01 PM
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4/16/2012 7:22 AM	Rate (0)
Chook Experienced Member Joined: 6/13/2006 Last visit: 10/27/2025 Posts: 201 Rating: (8)	Hi, Normally we check the resistance (ohm) of i/p & o/p and the mV if it appears to be mechanically overloaded. Regards, Chook
	[IMG]http://i17.tinypic.com/66b7jas.jpg[/IMG]
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4/16/2012 9:17 AM	Rate (0)
azad_dsc Posts: 80 Rating: (1)	Most of load cell will give 10-15mV reading if we measure between +Input and -Input. Provided 10Vdc is feed at +Exc and -Exc. Azad
azad_dsc Posts: 80 Rating: (1)
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4/16/2012 10:06 AM	Rate (0)
ABenno Posts: 206 Rating: (22)	Hello wieghting, in chapter 8 of the load cell manual http://support.automation.siemens.com/WW/view/en/32466622 you can find instructions how to test a load cell. Regards ABenno
ABenno Posts: 206 Rating: (22)
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4/17/2012 2:48 PM	Rate (0)
weighting Posts: 17 Rating: (0)	thankyou for explain. If initialohm is 300,than one of the loadcell is damage,so the ohmchanged. thesiwarexmodelhave alarm? how can i chek the ohm?
weighting Posts: 17 Rating: (0)
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4/17/2012 3:29 PM	Rate (0)
ABenno Posts: 206 Rating: (22)	Hello weighting, the Siwarex FTA and FTC has the possability to measure the resistance of the load cells connected. You have a command to set a impedance reference (11) and one command to check the impedance (10). In data record 31 you can see the refence- and the actual value. Only the FTx modules have this feature. The measured impedance is the resulting impedance of all connected load cells. Regards ABenno
ABenno Posts: 206 Rating: (22)
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4/18/2012 2:11 AM	Rate (0)
Chook Experienced Member Joined: 6/13/2006 Last visit: 10/27/2025 Posts: 201 Rating: (8)	Thank you for your explain ABenno. The initial resistance should be≈ [ 400Ω i/p, 350Ωo/p ] Regards, Chook
	[IMG]http://i17.tinypic.com/66b7jas.jpg[/IMG]
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4/18/2012 2:49 PM	Rate (0)
weighting Posts: 17 Rating: (0)	Thank you ABenno! In siwatool FTC i find the command 10and11,usually impedance reference vaule the same as loadcells impedance.when the impedance was changed ,may be loadcell have problem .
weighting Posts: 17 Rating: (0)
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