Answer / yomama

Your question suggest you are using a "Differential Pressure
Transmitter" in which case since the -10 Bar vacuum is
applied to both the Hi and Low legs the -10 Bar vacuum is
neutral the Transmitter

In that case we merely multiply the distance (850 mm) x (.73
SG) = 620.5

Answer / aftab ahmed mazari

If you installed the remote seal transmitter at flanges,
then in case empty tank /vessel, the transmitter will
showing -mA. so do the followings:
1. Make transmitter 4 mA in this case(without any pressure,
only lower low leg remote seal pressure acting)
2. Apply 850 x 0.73 =620.5 mm of water to high side of
transmitter flange and set transmitter out put 20 mA.
aftabmazari@yahoo.com

Answer / yomama

Your question suggest you are using a "Differential Pressure
Transmitter" in which case since the -10 Bar vacuum is
applied to both the Hi and Low legs the -10 Bar vacuum is
neutral the Transmitter

In that case we merely multiply the distance (850 mm) x (.73
SG) = 620.5

Answer / ys

close the both hp and lp iso valve(so that any pressure
should not act on tx diaphragm). now measure the input
pressure in mm by connecting hand communicator to tx.. this
is the LRV.now measure span(ie here it is 850mm).multiply
span with liquid density(ie 850*0.73).we will get 620.5.
this is your URV

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