If the range of a 3-15 psi pneumatic transmitter is 50-350°C, what is the output signal value, in psi, at 198°C?

To determine the output signal value of the pneumatic transmitter when the temperature is 198°C, you first need to understand the relationship between the input range (temperature) and the output range (pressure in psi).

The transmitter's input range is from 50°C to 350°C, which corresponds to an output range of 3 psi to 15 psi. The first step is to calculate the span of the input and output ranges:

• The temperature span is 350°C - 50°C = 300°C.

• The pressure span is 15 psi - 3 psi = 12 psi.

Next, you need to calculate the position of 198°C within the input range. The temperature difference from the minimum input temperature (50°C) is:

198°C - 50°C = 148°C.

Now, you can find the percentage of the range that this temperature represents:

Percentage of input range = (148°C / 300°C) * 100 = 49.33%.

Having established where 198°C falls within the input range, you can apply this percentage to the output range to find the corresponding pressure value. You calculate the output pressure by using the percentage of the output span:

Output change = 49.33% of