Answer / mithilesh kumar

zero elevation.
when TX range is -100 to +100 mmwc.
during calibration tx shows 0(zero).it's called zero
elevated.
ie. when we get zero value which is greater than LRV.
Zero Suppression:
when TX range is 20 to 100 mmwc.
during calibration TX shows 0(zero) value.it's called as
zero suppression.
ie. when get zero value but it's below of LRV.

any coments you most welcome

Answer / saravanan.m

ZERO ELEVATION MEANS WHITE FIXING THE TRANSMITTER LOWER
THAN THE PROCESS LINE IT GOES NEGATIVE .TO CHANGE FROM
NEGATIVE WE ADJUST THE ZERO SCREW.
ZERO SUPPRESSION IS WHILE FIXING THE TRANSMITTER ABOVE THE
PROCESS LINE IT SHOWS ABOVE 4MA THEN WE ADJUST TO 4MA

any body pl suggest me the best type of transmitter for level monitoring of a distillation still which consists of highly corrosive and inflammable liquid.closed vessel height=5000mm especially in petrochemical industries

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