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sskumaran
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Join Date: Jul 2009
Posts: 7

Formula for % and mA

07/30/2009 10:53 PM

Dear Sirs,

Kindly give me the formula for :

By pressure value how to calculate mA ( LRV 10 barg, URV 50 Barg Process pressure shows 18 barg so what is the Output mA)

by mA how to calculate pressure.
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muzza
Active Contributor

Join Date: Jul 2009
Location: Western Australia
Posts: 24
#1

Re: Formula for % and mA

07/31/2009 12:37 AM

Assuming 4-20mA,

mA=(((PV-LRV)/URV)*mA_Scale)+mA_Offset

=(((18-10)/40)*16)+4

=7.2mA
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sskumaran
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Join Date: Jul 2009
Posts: 7
#2
In reply to #1

Re: Formula for % and mA

07/31/2009 3:56 AM

THANKS A LOT
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josej
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Join Date: Mar 2008
Location: Mumbai
Posts: 250
Good Answers: 2
#3

Re: Formula for % and mA

07/31/2009 4:13 AM

Try to Understand about Interpolation You , will understand the logic behind that Calc

Regards

Jose John
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rajkumar.renganathan
Participant

Join Date: Jun 2009
Posts: 4
#4

Re: Formula for % and mA

08/04/2009 2:18 AM

lrv.........10 bar.....4 mA

urv........50 bar.....20 mA

so 1 bar......0.4 mA

then 18 bar.........18x0.4=7.2 mA

Is this true????????
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Previous in Forum: Dietert Detroit Electric Permmeter (338) - Calibration   Next in Forum: caplary transmitter calibration method

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