ABB SM2000 User Manual page 75

...4.6.5 Totalizer Configuration
Count rate/cut-off 0.01, 9999
Count rate / Cut off
Count rate 10.000
Cut off 0.0
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
Count rate 100.00000
Input Signal
On
Off
Units
2000
1000
0
1hr
Totalizer Value
Units
500
400
300
200
100
0
t
1minute
1minute
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:
3
150 m /hr
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
value (in engineering units) at which the totalizer is to stop
counting.
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.
t
4 CONFIGURATION...
3 /min) to the nearest 0.1m
0.04167 pulses/second.
=
3 , the
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