8
LEVELtrol-II Installation & Operating Instructions
3.2 Corrected Tank Volume
Measurements:
An ultrasonic, hydrostatic or differential pressure level sensor measures
the liquid level in a horizontal tank. A temperature sensor is installed to
correct for liquid thermal expansion.
Calculations:
• Corrected Tank Volume is calculated using the level and temperature
inputs as well as the liquid's thermal expansion coefficient stored in the
LEVELtrol-II. Use the "SET FLUID PROPERTIES" submenu to define
reference temperature and density values for standard conditions.
Output Results:
• Display Results
Level, Available Corrected Volume, Gross Corrected Volume,
Temperature
• Analog Output
Tank Volume or Temperature or Density
• Pulse Output
Change in Tank Volume
• Relay Outputs
Level or Tank Volume Alarms
Applications:
Monitoring corrected volume of a liquid stored in a horizontal tank. Alarms
are provided via relays and datalogging is available via analog (4-20mA)
and serial outputs.
Corrected
Tank Volume
Corrected
Liquid Volume
Illustration
STOP
START
5
0
–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
LEVEL
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
T
Ultrasonic
Level Sensor
Temperature
Transmitter
