flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mm

flow transmitter range is 0 -500 mmwcc but the transmitter
shows 12 ma for o mmwc instead of 4 ma ...how to solve this
problem when we apply 375 mmwc it shows 16 ma

Question Posted / srinivasa rao

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flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...

Answer / satya

1st ensure the tapping . the root valve. orifice range . tx range . then open the high side , open the low side drain the flow shoude be zero . if not trim the tx. and then. take it online

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flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...

Answer / dinesh

the transfer function should have been square root but the transfer function mentioned is linear which is as follows

y=mx+c where m is slope & c is the bias
to calculate slope
m={(y2-y1)/(x2-x1)} where
y2=16ma; y1=12 ma; x2=375 mmwc; x1=0 & C is 12ma at 0 mmwc

so y= (4/375)*x + 12

in order to get correct flow change the transfer function to square root in Tx

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flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...

Answer / ghanshyam

brother also check its sqrt or linier

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