Hello all. I have a pico and also have the fluke PV350 transducer. I decided to try using it for an in cyl pressure test, but it seems that the scaling is off. For instance, when I tested a 4.3 blazer with it cranking compression and scope set to the wps -1 it measured somewhere around 16psi, which of course is completely inaccurate. What I want to know is how can we use a different pressure transducer and get good readings with it. I cannot afford to buy the wps system at the moment, and I have multiple transducers which should be useable. Any input is appreciated.
PS I have a 100, 200 and 500 psi transducer which could be plugged into this scope, but the same question stands on how it would be scaled correctly for the scope.

You can make your own probes to use with your equipment as long as you know what the conversion numbers are.s

Ok, well this is where I am lost. I don't know the conversions. I know that the pv350 is set to mV scale ona  fluke meter and converts to psi on the screen of the meter. The other transducers I have are bought on the internet and require a 5v input and ground and then obviously the signal will go to the scope. They are 100 200 and 500 psi transducers but how would these conversions be done? This is where I need help.

yellowshaker, maybe this will help you. PV 350 conversion.

on the psi scale 1 mv = 1 psi

on kpa scale   1 mv = 1 kpa

You can get a more detail pattern using kpa scaling unless your measuring over 250 psi. I do not own one. I read this in one of my books I have. I hope this helps you out.

Yellowshaker wrote on Nov 9^th, 2016 at 4:05pm:

also have the fluke PV350 transducer.

As a gesture of good will, I sent you some PV350 probes so check your email.

As for you other transducers, you would need to know the volts to pressure ratio, if they are linear or not, etc to make probes for them.  If you intend to use them under dynamic conditions though, this would all be a waste of time because they will not be accurate.

The best thing you could do to enhance your PicoScope journey though is to subscribe to our Picogroup resources.   ;)

Tom Roberts wrote on Nov 10^th, 2016 at 4:49pm:

Yellowshaker wrote on Nov 9th, 2016 at 4:05pm: also have the fluke PV350 transducer. As a gesture of good will, I sent you some PV350 probes so check your email. As for you other transducers, you would need to know the volts to pressure ratio, if they are linear or not, etc to make probes for them.  If you intend to use them under dynamic conditions though, this would all be a waste of time because they will not be accurate. The best thing you could do to enhance your PicoScope journey though is to subscribe to our Picogroup resources.   ;)

+1

See reply 4 and 5  :)