Omega FC-21 - Manual (Page 11)

7
FC-21 Flow Computer
3. Applications
3.1 Liquid Volume
Measurements:
A flowmeter measures the actual volume in a liquid line. A temperature
sensor can also be installed to correct for liquid thermal expansion (see
3.2 Corrected Volume).
Calculations:
• For Flowmeters with Pulse Outputs, Volume flow is calculated using
the flowmeter frequency output and the user entered K-Factor.
• For Flowmeters with Analog Transmitters, Volume flow is calculated
using the measured flowmeter signal and the user entered scale settings.
Output Results:
• Display Results
Flow Rate, Resettable Total, Non-Resettable Total
• Analog Output
Rate or Total
• Pulse Output
Total
• Relay Outputs
Rate or Total Alarms
Applications:
The Flow Computer can monitor actual volume flow and total of any
liquid. Flow alarms are provided via relays and datalogging is available
via analog (4-20mA) and serial outputs.
Liquid Volume
Pulse Input; Average K-Factor
input frequency * time scale factor
Volume Flow =
K-Factor
Analog Input; Linear
Volume Flow = % input * Full Scale Flow
Liquid Volume
Illustration
Calculations
STOP
START
PRINT
5
0 –
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
Flowmeter