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l.p(at)talk21.com
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 Posted: Thu Jun 07, 2012 7:15 am Post subject: VMS capacitance fuel probes |
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Is anyone aware of a compatible capacitance fuel probe for the Vision Microsystems product?
One of mine is no longer working.
Any help much appreciated.
Patrick Elliott, Long-EZ, G-LGEZ
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longg(at)pjm.com
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| Posted: Thu Jun 07, 2012 7:59 am Post subject: VMS capacitance fuel probes |
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Patrick,
If you mean "familiar with", yes lots of us use them. I use the Dynon display rather than the VM display, but the capacitance senders are the same. Some things to check...
1. Connections to the senders. Assuming you have the 3 wire tube type, remove and check all connections for continuity and resistance. They may have loosened or the ground quality has lessened over time. Be sure none of the connectors have failed or is somehow compromised. A common problem.
2. Check the out voltage on the white wire (sender signal) and see if the coincides with the voltage recorded when you did your calibration. You should have that written down somewhere.
3. If all that checks out, it's probably the VM display. Internally (my converter is external) they convert the capacitance voltage to dc voltage which is how the unit reads the value.
When you do your test you will be reading the capacitance voltage which will need to be converted to dc voltage to verify.
If you need an external capacitance voltage converter, let me know - there is a guy in Texas that makes them.
Glenn
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