ABB SM2000 User Manual page 66

...4 CONFIGURATION
...4.6.5 Totalizer Configuration
0.01, 9999
Count rate/cut-off
Count rate / Cut off
Count rate
Cut off
Input Signal
m3/sec
m3/hr
150
0.04167
75 0.0208
Area = total
volume of
flow
0
t
1hr
The totalizer pulse rate is
proportional to the input signal.
At this point it is
0.0208 pulses per second
100.00000
Count rate
Input Signal
On
Off
1min.
64
10.000
0.0
Units
0
1hr
Totalizer Value
Units
0
t
1min.
Totalizer Value
Note. Analog Sources only. The Count rate is
determined by the maximum number of engineering units (or
pulses) per second and the smallest totalizer increment:
engineering full scale value (rate)
engineering units (in seconds)
– to totalize a flow with a maximum rate of
Example
2500 litres/min (= 2.5m
calculation is as follows:
150 m
OK
3600 seconds
The resulting value must be within the range 0.00001 to
99.99999. The totalizer increment is determined by the
number of decimal places in the predetermined count – see
'Count Range' above
The Totalizer Cutoff (analog sources only) is the lowest input
2000
value (in engineering units) at which the totalizer is to stop
counting.
1000
t
Note. Digital Sources only. A digital totalizer pulse can
be scaled to represent a value of between 0.00001 and
1000. The totalizer is then incremented by this amount each
time there is an off/on transition.
– a count of 5 digital pulses with the Count rate set
Example
to 100 would increase the totalizer from 0 to 500 in 100 unit
steps.
500
400
300
200
100
t
3 /min) to the nearest 0.1m
3 /hr
0.04167 pulses/second.
=
3 , the