Need analog signal please help
Need analog signal please help
(OP)
Gents,
Here is the deal, I have Flow meter FHKU 100 installed on disinfection system. The flow meter have +8V, GND and IN connections on control panel, and displays flow rate on control panel.
I need an analog input (+,-) to the system to control the disinfection rate 0-20 mA or 4-20 mA. It will be perfect if i can get this signal from flow meter proportional to flow rate, meaning maximum flow 20 mA, no flow 0 or 4 mA.
Is there any way to convert or get parallel signal from this flow meter.
thnx in advance.
cheerz
Here is the deal, I have Flow meter FHKU 100 installed on disinfection system. The flow meter have +8V, GND and IN connections on control panel, and displays flow rate on control panel.
I need an analog input (+,-) to the system to control the disinfection rate 0-20 mA or 4-20 mA. It will be perfect if i can get this signal from flow meter proportional to flow rate, meaning maximum flow 20 mA, no flow 0 or 4 mA.
Is there any way to convert or get parallel signal from this flow meter.
thnx in advance.
cheerz





RE: Need analog signal please help
You should use a "Process Controller".
They are pretty cheap and let you make adjustments and run PID control algorithms, etc.
Example:(Many many many available)
http://web
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Need analog signal please help
http://ww
So, in answer to your question, if your controller needs an analog signal, you might consider
a) getting a flowmeter that outputs flow rate directly as an analog signal.
b) converting the open collector pulses to an analog flow rate signal with a frequency converter, a pulse-to-analog converter
Devices like the Precision Digital PD693 panel meter takes an open collector input, displays the flow rate and with an optional analog output provides an isolated 4-20mA flow rate signal.
http
Or the Phoenix Contact MCR-f-UI-DC, 2814605 is a DIN rail mount frequency converter, but it requires a software programming kit and cable to scale the output.
http
Or there are a hundred other I/O manufacturers' frequency converters that will do the job.
Dan