I would like to see the sensor output results when hooked up as per @ericgibbs post in #5, so far i don't see any confirmation of an output swing between ~0v and +ve supply?
Max.

 

So I went ahead isolated the sensor + pull up resistor as per post#5 and here are the results. Im now thinking my voltage divider is a little too low. It cuts the reference voltage down to 0.5V. Im thinking I should use two of my 47K resistors to set this reference voltage to approximately 7.5V.

 

There is no way that any subsequent electronics should normally affect the level of the transducer output in any way.
Max.

 

So I went ahead isolated the sensor + pull up resistor as per post#5 and here are the results. Im now thinking my voltage divider is a little too low. It cuts the reference voltage down to 0.5V. Im thinking I should use two of my 47K resistors to set this reference voltage to approximately 7.5V.

View attachment 196377

Just put your sensor output directly into pin 6 of the chip and the 8K2 resistor ,without the 470pF capacitor, and see what output voltage you're getting

 

...... but without the 470p cap the risk is that pin 6 is held low longer than the time constant RtCt, in which case the linearity of the F-to-V conversion may be compromised.

 

So I rehooked everything up and used two 10k resistors I found to set the reference Voltage to 12V. I powered the chip on and got ~1.9V constant no matter my frequency signal. This was tested both with and without the 470pF capacitor and I got the same results.

 

Hello,

Try the values shown in the circuit below.
The response will be slow but will be a compromise between output ripple and response time
Cap CL affects the amount of ripple in the output.
R2 should drop 2V. Equation for R3: (VS-2V)/200uA=110k
I've shown 12K resistors to drop the voltage down from the sensor output, but you can use 10k if you wish.
The pot calibrates the output.

eT

 

Hello,

Try the values shown in the circuit below.
[…]

Sorry for the delay -
Thanks eT! I bought some more stable components, sized per your diagram and was able to get it working!
I am getting an output ripple that ranges about 0.2V which is a little too much so I will be playing around with the CL capacitor sizing and also RL sizing as I don't need the full range of 200Hz so I am going to adjust this down to 150Hz @ 10V by increasing RL.

Shout out to everyone else, as this whole Forum has been very helpful!

Here is my current circuit (attached a 50K resistor in series with RL and does not have the 5k POT as I can calibrate this in Labview)

 

Sorry for the delay -
Thanks eT! I bought some more stable components, sized per your diagram and was able to get it working!
I am getting an output ripple that ranges about 0.2V which is a little too much so I will be playing around with the CL capacitor sizing and also RL sizing as I don't need the full range of 200Hz so I am going to adjust this down to 150Hz @ 10V by increasing RL.

Shout out to everyone else, as this whole Forum has been very helpful!

Here is my current circuit (attached a 50K resistor in series with RL and does not have the 5k POT as I can calibrate this in Labview)
View attachment 197482
View attachment 197481

Nice! Glad you have it working.

eT