 M-System's
DC/Frequency Converter and a totalizer realize your application. The DC/Frequency
Converter (model: AP, APU) accepts an analog input and provides a pulse
rate output in proportion to the input.
Let's give an example how to indicate an integrated flow by an analog signal
with flow range 0 - 400m3/h. First determine
the volume per count to input to the totalizer. Now 0.1m3/h
per count in this example. When the max. flow 400m3 flows for an hour, the pulse should be 4,000 pulses. Therefore, the max.
output frequency of the DC/Frequency Converter will be 4,000 pulses/h =
4,000 (pulses) / 3,600 (seconds) = 1.11111.... (Hz). Specify the output
range 0 - 1.111Hz as effective digit of the DC/Frequency Converter is 4.
Then the totalizer indicates this pulse signal.
Max. output frequency may be very small, e.g. 0.01666.... depending on the
flow range or how to determine volume per count. However M-System's DC/Frequency
Converter can provide micro Hz output. In the above case, specify the output
range 0 - 16.67mHz. |
I
want to indicate an integrated flow value by 4-20mA DC analog signal output
by a 2-wire electromagnetic flowmeter.
