KRITI

Hello,

As you said last Friday I corrected the P2 and I also wrote the fresh reading.

Pressure Sensor Reading:        P1                                           P2

                                                  0.656 Bar                              0.658 Bar 

Daq Factory Readings :        1.257V                                   1.264 V 

I used 2 point calibration formula and the answer is almost 0.52.   So, in the conversion, I wrote in the formula (Value*0.52).

After that switch on the Vaccum pump the current readings are:

Pressure Sensor Reading:         P1                                           P2

                                                     0.709  Bar                             0.710 Bar

Daq Factory Readings :           0.688V                                  0.690V

Still, the values are not similar as you can see those above readings.

Can you please elaborate, what is the next step will I do so that in both the systems the values will be showed the same?

For reference, I also upload the short video.

I will be very glad for your guidance and waiting for your answer.

KRITI

Quote

Thank you for your response.

OK, I understand there is a problem with P2 due to resistor as you mentioned. I will check with the resistors and try to rectify it hopefully but my question is that:

Let's say P1 and P2 give the same pattern of values ( i.e. in Volts) than how I will change these values (Voltage) into pressure (bar). Can you give me conversion factor or formulas to change voltage value into pressure value because at last, my main aim is to show the same values in DAQ or in pressure sensors.

Kriti

 

 

Okay,

as per you said today I took fresh readings of both pressure sensors(P1, P2) as well as also wrote down the values which are showing in the Daq Factory without using any conversion or any formula you can say that these values are the ideal values. In the Table, you can see clearly that in the software reading much different as compared to the pressure sensors readings.

For reference, I also make a small video and send a  reading table so that you can understand more clearly what I want to say that to you and one thing which I cleared that the Daq Factory shows the values only in the voltage or volts so it means that the reading which is shown in my laptop screen is in volts not in Bar.

I check on the net this is 16bit Analog Input Daq.

So in a simple way how can, I convert these values which shown in volts into Bar so that both the same values will be shown in the pressure sensors as well as in the software.

Note: 0-20mA is the pressor sensor current I also add the pic.

Kriti.

Okay,

as per you said today I took fresh readings of both pressure sensors(P1, P2) as well as also wrote down the values which are showing in the Daq Factory without using any conversion or any formula you can say that these values are the ideal values. In the Table, you can see clearly that in the software reading much different as compared to the pressure sensors readings.

For reference, I also make a small video and send a  reading table so that you can understand more clearly what I want to say that to you and one thing which I cleared that the Daq Factory shows the values only in the voltage or volts so it means that the reading which is shown in my laptop screen is in volts not in Bar.

I check on the net this is 16bit Analog Input Daq.

So in a simple way how can, I convert these values which shown in volts into Bar so that both the same values will be shown in the pressure sensors as well as in the software.

Note: 0-20mA is the pressor sensor current I also add the pic.

Kriti.

The raw reading which is showing in the graph is P1=11.64 Bar and P2 = 11.98 Bar that is totally different from the both pressure sensor readings.

for the unit bar, I clicked the graph properties on the page and change the unit into Bar.

and my main purpose is to show the same values in both pressure sensors as well as in both the graph for this I need the right formula which I have written in the conversion part.

Hello,

Yeah, I understand that thing but for more clarity, I will rectify my query again.

These are my 2 pressure sensors values which are showing in the sensor display:

Pressure Sensor1= P1= 609millibbar = 0.609 bar.

Pressure Sensor2= P2= 610millibar = 0.610 bar.

Now I want to show exact these values on the graph which I made on the page so how I can do this in a simple way because I am getting different values than these values.

Thanks

Kriti.

41 minutes ago, AzeoTech said:

Does the channel currently read a number from 0 to 20?  Or does it read a number from, say, 0 to 5?  As an example, if it reads 0 to 20 and 4 corresponds to 0 bar, and 20 corresponds to 1.6 bar then the Conversion would be:

Value * 1.6 / 20

Basically, when 0 = 0, the math is super simple.  It is just Value * engineering max / raw reading max.

Hello,