7.5
Setting Screen
The LSP-X01 Series sensor measures the hydrostatic pressure created by the liquid level in the tank. Con-
verting this measured pressure value to other parameters such as the tank level and the remaining liquid
volume in gallons requires the tank volume capacity, the tank maximum liquid height measured from the
bottom of the tank to the liquid surface when filled to the rated capacity, and the density of the liquid.
Measurements assume the tank has a uniform horizontal cross-section. To convert the measured pressure
to volumetric information, the LSP-X01 Series sensor requires the user to enter three parameters via the
uPyxis®
Desktop App’s
Setting
screen:
•
Volume
(rated volume capacity of the tank)
•
Max Height
(from the bottom of the tank to the liquid surface when filled to the rated capacity)
•
Density
(of liquid in lb/gal)
From the
Settings
screen, you can also set the
Display Unit
and
Log Period
(time, in seconds, between two
measurements). To save your setting changes, click
Set
.
Figure 16.
8
Outputs
8.1
4-20mA Output Setup
The 4–20mA output of the sensor is scaled as:
• 4 mA = (Tank is Empty) = (Level is 0)
• 20 mA = (Tank is Full) = (Level is maximum height or volume)
The 4–20mA analog signal can be converted to one of three values (Level, Volume Remaining, or Volume
Consumed) in the controller receiving the output according to the above scale. For example, a nominal
100-gallon vertical tank, the maximum height is 36 inches. The tank volume is 100 gallons when it is filled
up to the maximum height 36 inches. The controller should be set up to convert 20 mA to 100 gallons, at
which the tank is full and the tank level is 36 inches.
LSP-X01 Series User Manual
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