Level Pro 300 Series Installation Manual page 10

Levelpro-Sensors Manual
Heavy Duty Industrial Level Transmitter
Levelpro sensors are provided in distance measurement ranges i.e. 0-14 ft, 0-20 ft, 0-33 ft etc. To
calculate the maximum range or the liquid that a particular sensor will measure, use the following
Maximum Liquid Height (feet) = Maximum Liquid Height of Liquid / SG
Example :
0-14 ft transmitter installed in a liquid with a maximum height of 12 feet and a SG=0.9 will
have a Sensor Height with a range 0-14' = 14 feet /0.9 = 15.5'...so it can measure more liquid than
the 14' range due to the SG being below 1 (H
Example :
Compare the Maximum Liquid Height of a liquid with a SG = 1.5.
SG = 1.5: 0-20' Range transmitter will have a Maximum Sensing Height (Liquid) = 20/1.5 = 15 ft
SG = 1.0: 0-20' Range transmitter will have a Maximum Sensing Height (Liquid) = 20/1 =20 ft
When the Specific Gravity is less than 1.0, the Maximum Liquid Height of the transmitter will
increase. The reverse is true by increasing the Specific Gravity. With a SG = 1.5, the Maximum
Sensing Height (Liquid) = 15' with a Transmitter with a Range of 0-20 ft Transmitter
Note: Identifying the correct specific gravity for the fluid is critical in understanding the
operational range of the pressure transmitter.
How to configure a panel meter when a pressure transmitter is used?
This method works with the Levelpro Series level displays & controllers . These panel meters are
configured using the linear SCALE function. The settings are as follows:
Settings
Input
Display 1 | Empty
Input 2
Display 2 | Full
Remember, pressure transmitters are configured so 0 psi/ft = 4mA | 0.5V and the maximum psi/ft =
20mA | 4.5V. Levelpro pressure transmitter applications will not use the full range of the
transmitter. Therefore, a full tank will typically have a current less than 20mA | 4.5V.
Note: The values for empty and full represent what the display will show when the tank is
either Empty or Full. Empty and Full must be the same units ex: Gallons, Inches,
percent.
water)
20
Default
4.0 | 0.5 Input Current @ Empty
4.0 | 0.5 Display Value @ Empty
20.0 | 4.5 Input Current @ Full
20.0 | 4.5
Display Value @ Full
Represents Typical Setting
4mA | 0.5V
Empty Value
20mA | 4.5V
Full Value
10