SM500F
Field mountable paperless recorder
7 Configuration
110
IM/SM500F Rev. Z
Note.
Analog totalizers only.
If the recorder holds the relationship data between the selected
engineering range unit of measurement (see page 97) and the
selected totalizer units (see page 107), the totalizer count rate is
calculated and displayed automatically.
Set the required totalizer count rate (if necessary) and cut off value.
The count rate is determined by the maximum number of engineering
units (or pulses) per second and the smallest totalizer increment:
Example
– to totalize a flow with a maximum rate of 2500 liters/minute (=
2.5m
3
/minute) to the nearest 0.1m
3
, the calculation is as follows:
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' value – see page 108.
The totalizer cut off value is the lowest input value (in engineering units) at
which the totalizer is to stop counting.
engineering full scale value (rate)
engineering units (in seconds)
--------------------------------------------------------------------------
150m3/hour
3600 seconds
---------------------------------
0.04167 pulses/second
=
The totalizer pulse rate is
proportional to the input signal.
At this point it is
0.0208 pulses per second
0
150
t
Area = total
volume of flow
m
3
/hr
m
3
/sec
0.04167
0.0208
75
1hr
Input Signal
0
2000
t
Units
1000
1hr
Totalizer Value
