Hi,

I am looking for an appropriate sensor to suit the PV380 Freq input that will allow me to read a rotary shaft speed. I believe the Murphy MP magnetic pickups are not suitable due to a small number of teeth for reading.

I have tried an IF5645 Inductive Sensor but found that the input does not handle sufficient current to power the sensor.

Could you suggest any alternatives?

Thank you and best regards,
Alex

Alex,

Looking at the specifications for the 380 I can tell you that the frequency input was not designed to be an MPU input per our standards (voltage and frequency ranges are a little low). Also I can tell you we did not test it as an MPU input. We are, however, giving it a try today and seeing how well it works. The teeth count shouldn't matter that much, the input can read down to 2hz. If there is enough energy coming out of the MPU pickup, it should work. The bigger issue, I think, is actually too much energy. The MPU pick ups we have seen can, in some cases, generate over 200V inputs and the input on the 380 is rated only to 120V.

I will check with our hardware engineers as to what the input was designed to.

We will need a little more information from you.

1. What version of powervision are you running?
2. How many teeth and what type of shaft are you trying to measure?

All,

I would also be greatly interested in the test results.

Recently I tried about 4 different brands of mag pickups on an Izusu 4LE1 engine and the sensors I tried were just not able to drive the frequency input on the PV300 series displays.

Not sure if it was the engine, or what, but at a 1/8 turn, 1/4 turn, and a 1/2 turn backoff from the flywheel, I was not able to get a usable solution.

The tooth count on the engine flywheel was 117 teeth, and I was using PowerVision 2.6.20023 at the time.

I am running 2.6.20023 also.

I am measuring off a smaller shaft, with somewhere between 4 and a 10 teeth I would presume.

Thank you.

I am wondering if you have had any progress with this? I am very interested in knowing what sensors you would suggest for measuring shaft speed and also if the Murphy MP-series magnetic pickups are compatible?

Regards,

My apologies, just realised that I never did come back on this.

I successfully utilised a Murphy MP-series magnetic pickup in my application with the PV380.