If a relative humidity transmitter's output pressure is 12 psig and the range is 0-100%, what percentage would this indicate?

To determine the relative humidity percentage indicated by a output pressure of 12 psig from a transmitter with a range of 0-100%, it is important to first understand the relationship between the output pressure and the percent range of relative humidity.

The range of the transmitter is from 0 psig to 16 psig, which corresponds to the full scale of relative humidity from 0% to 100%. Thus, under this setup, every 1 psig increases corresponds to a change in the relative humidity percentage.

To find the percentage indicated by the output of 12 psig, you can use the following formula to calculate the equivalent percentage based on the scaled output pressure:

1. Determine the actual working pressure range:

• Minimum: 0 psig (0% RH)

• Maximum: 16 psig (100% RH)

2. Calculate the percentage output for 12 psig:

• The formula to find the relative humidity percentage is:

[

\text{Percentage} = \left(\frac{\text{Output Pressure} - \text{Min Pressure}}{\text{Max Pressure} - \text{Min Pressure}}\right) \times 100

]

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