Other Parts Discussed in Thread: EVM430-FR6047
Hi
i'm newbee.
I am developing a flow meter for the first time.
I'm trying to do initial development using EVM430-fr6047 and Audiowell HS0014 (DN15).
and I am using UltrasonicWaterFR604x_02_40_00_00 Demo program and USS.exe from USS_02_40_00_00.
For the initial parameters, the initial parameters were set by referring to MSP Academy - Ultrasonic Water Flow Meter Design and Testing.
By the way, after the first initial setting, ADC capture was set to +/-800 ADC Count, but the next day to test again, the power was turned on again, the same parameters were reapplied through Request Update, and the ADC capture was checked again. Changed to +/- 600 ADC count.
Q1. This phenomenon repeats almost every day and fluctuates greatly from +/- 1400 to +/- 400. Every time the ADC Capture is checked and the Gain is changed. Is this normal?
Please check if I'm setting it up properly.
I would like to be confirmed if any of the procedures I am going through are wrong or if there are additional procedures that need to be carried out.
Currently, we are purchasing the parts necessary to create an environment where water flows, but we have not been able to create an environment that can be confirmed at this time.
Since we need to be able to accurately check the volume in liters even in an environment where water does not flow, we are checking the initial setting when the HS0014 ( DN15 ) is filled with water and there is no water flow.
In this case, the water flow is zero, so we expected both the VFR and Volume in Liters values to be zero.
Although the measurement was carried out for more than 30 minutes, both VFR and Volume in Liter values had positive values from the beginning and continued to increase as time passed.
Q2. I wonder if there are any methods to determine that the water flow has stopped with Ultrasonic in a situation where the water does not flow.
Q3. the Meter Constant seems to recalculate the Meter Constant value by comparing the difference with the measured value of other commercially available flow meters when there is water flow, is that correct?
Currently, we could not conduct a test in an environment where water flows because we did not create an environment where water flows. So I couldn't change the Meter Constant to suit my environment.
Regards, JC
