ABB ControlMaster CM15 User Manual page 49

ControlMaster CM15
Universal process indicator
Frequency Mode
Eng Hi (of source) x volume unit conversion x pulse duration
Count Rate =
Example:
Eng Hi = 6000 l/m. Frequency input fullscale (Electrical High) = 500 Hz.
Totalizer required to increment in m
Volume unit conversion: 1 l = 0.001 m
Source time units = minutes, count rate units = seconds.
Time unit conversion: 1 min = 60 s
Pulse Duration =
6000 x 0.001 x 0.002
Count Rate =
If the input source is at a fixed rate of 6000 l/min (500 Hz) the totalizer increments at 0.0002 m
If the input source is reduced to a fixed rate of 3000 l/min (250 Hz), the totalizer increments at:
3000
x 0.0002 = 0.0001 m
6000
IM/CM/I–EN Rev. D
1
/ DIN
8
time unit conversion
3
.
3
.
1
Analog input 1 Electrical High (Hz)
= 0.0002 m
60
3
.
3
/s
7 Advanced Level
3
/s.
47