Question

Consider the level Transmitter with a 0 to 100ft range, but it has a transmitter with a current output of 4 to 20 mA. With these specifications,

find: The level measurement when the transmitter output is 4 mA .

Answer 1

When the transmitter output is 4 mA, the level measurement is 0 ft.

Step-by-step explanation:

The level measurement when the transmitter output is 4 mA can be calculated using proportionality. The current output of the transmitter ranges from 4 mA to 20 mA, which corresponds to a range of 0 to 100 ft. We can set up a proportion:

(20 mA - 4 mA) / (100 ft - 0 ft) = (x mA - 4 mA) / (x ft - 0 ft)

Solving for x, we find that when the transmitter output is 4 mA, the level measurement is 0 ft.

When the level transmitter outputs a current of 4 mA, it represents the minimum value of the measurement range, which in this case corresponds to 0 ft since the transmitter range is from 0 to 100 ft. Therefore, a 4 mA signal indicates that the fluid level in the container is at the very bottom or that there is no measurable level of fluid.