Honeywell ST 3000 SMART TRANSMITTER STR93D - Manual (Page 12)

34-ST-03-57
Page 12
Density or Interface
Calculate the minimum and
maximum pressure differentials to
be measured (Figure 18).
Pmin = (SGmin – SGf) x (d);
minimum density, 4mA output
Pmax = (SGmax – SGf) x (d);
maximum density, 20mA output
Where:
d = distance between the taps
SGmax = maximum Specific
Gravity
SGmin = minimum Specific Gravity
LP
HP
24257
SGf = Specific Gravity of capillary
fill fluid (See Page 9 for
values.)
Figure 18—Density, direct acting transmitter configuration