Coverts pressure sensor to head. The following computation is used:
Head = conversion factor to bring pressure to head's unit * Pressure + elevation = value in unit of elevation
The conversion factor is derived using:
p = 0.433 h
p = pressure (psi)
h = head (ft)
p = 0.1 h
h = head (m)
p = pressure (kg/cm2)
Defines the time series data fed into the function. This can be a sensor ID or another function.
*Input data is optional in most cases. If Info360 detects that the first input is time series data, it will be applied to the function. Otherwise, the current active sensor's data will be used, which is often the case in Reference Charts.
Example Usage as an Expression:
Head(30) - outputs 30 head data points using pressure data in the current date interval.
Examples Reference Chart:
The following example shows hourly pressure in reading, with Head () > 220 units marked by the green triangle. The reference chart shows the corresponding head reading for a given pressure in the same time frame.
This function is most commonly accessed from the Charts on the Chart interface.
For information on setting up custom equations and syntax, please refer to Analytical Functions.