hello:
you must be use wetleg d.p(diffrentioal pressure transmitter as following procedure:
1-connect the high pressure side leg of transmitter to top of the rang tank and low pressure side to bottom the tank.
2-fill of the high pressure side leg with oil
that boilled point is up to 135 deg.
3-find the low and high range with this furmol.
LRV=dp.-hp
URV=dp.-(L+h)p
when: LRV=LOWER RANG VALUE
URV=UPPER RANG VALUE
d=distance between transmeter and high
side.
p.=specific gravity of oil filling
p =specific gravity of water
L =distance between %100 liquid level
and 0% liquid level(measuring range)
h=distance between %0 liquid level and
high pressure outlet port.
d=distance between high pressure outlet
port and transmitter.
