9
LEVELtrol-II Installation & Operating Instructions
3.3 Total Mass in Tank
Measurements:
Actual level is measured by the level sensor (ultrasonic, hydrostatic
or differential pressure transmitter). Temperature is measured by the
temperature transmitter. A density transmitter can alternately be used for
direct density measurements.
Calculations:
• The density is calculated using the reference density and the thermal
expansion coefficient of the liquid (see "SET FLUID PROPERTIES"
submenu).
• Total Mass in tank is computed for tank geometry.
Output Results:
• Display Results
Level, Total Available Mass in Tank, Total Gross Mass in Tank,
Temperature, Density
• Analog Output
Level, Total, Temperature or Density
• Pulse Output
Change in Tank Mass
• Relay Outputs
Level, Total or Temperature Alarms
Applications:
Monitoring level and mass total of any liquid in a tank. Alarms are provided
via relays and datalogging is available via analog (4-20mA) and serial
outputs.
Total Mass in Tank
Liquid Mass
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
Ultrasonic
Level Sensor
Temperature
Transmitter
T
