Recent content by Mark_B

It seems 0.75MHz SPCLK, or ~41,667Hz sample rate, is more than enough. Thank you for taking the time to break that down.

If we count other nations - there was recently a disaster in South Korea which was reportedly the result of a double-engine bird strike. Sadly 179 people killed in one event.

I am setting up a circuit for reading a 10k type 3 thermistor (10kohms). I have an MPC3008 ADC I will be interfacing with an AVR/Atmega644P microcontroller. Why does Microchip recommend higher clock speeds for higher Vdd? I came to believe higher operating voltage allows higher ADC clock speed...

Understood. Thank you for taking the time to explain. I am new to forums in general and honestly didn't put enough thought into it.

There is a control valve but I am controlling it and it stays wide open. The thing that really bugged me was that the pressure differential reading would stay the same for at least several minutes after I turned the pump off. I did zero the transmitters at atmospheric pressure before filling...

Yes sort of. I had another one running on a slightly different thread with two groups of people. I take it that is problematic...

Just an update - My two pressure transmitters seem to return nonsense readings that are unusable for determining flow. With pump at either 15% or 95% speed, the pressure differential reading is nearly identical, even though It seems apparent there is much more flow. I did my best to clear air...

Just an update, the two pressure transmitters seem to return nonsense readings that are unusable for determining flow. With pump at either 15% or 95% speed, the pressure differential reading is nearly identical, even though It seems apparent there is much more flow. I did my best to clear air...

I meant if I want to use the manufacturer Head loss vs GPM data (which was apparently in the table I was reading all along). Your point is taken, though.

I might do this as well.

My coil is 3/8" tube, but I am connecting with 1/2". To accurately measure pressure drop across the coil, I assume I will need to connect my transducer directly to 3/8" tube to get accurate pressure drop across the coil itself and not also be measuring the reducer etc?

I am currently reading Chapter 6, Fluid Flow in Piping, of "Modern Hydronic Heating and Cooling" by John Siegenthaler, P.E. I noticed the Titus coil performance table provides a loss of head per GPM through the coil instead of loss of pressure. This is interesting as the book explains viscous...

Doh! I looked right at it and didn't catch that. Thank you. I am still interested in learning if there is some mathematical/geometrical method for the sake of learning. Will look into the Crane TP410 referenced above.

It's a brand new coil so I think not possible.

Is the increased heat transfer of higher velocity flow the result of: 1) Increased turbulence and the resulting improved heat exchanger surface contact of a given mass of water as it travels through the heat exchanger 2) Is there a higher average fluid temperature within the coil which is a...