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dean.psiropoulos(at)veriz
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 Posted: Fri Apr 29, 2011 7:56 pm Post subject: VM1000 sensor question |
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Is there anyone who knows the ins and outs of the VM1000 B&W engine monitor
system. When I originally bought mine 10 years ago I ordered it for a
carbureted engine. The engine I finally installed has fuel injection which
has higher fuel pressure than a carb engine.
The VM1000 display shows fuel pressure pegged and flashing at 10 PSI. I
thought that the only thing that might be required to fix this was a
software change but a friend suggested I might need a new sensor with a
higher range as well. Would anybody know about this, did VM use two
different fuel pressure sensors? What brand and model number of sensor were
they? My sensor is a fancy 4 wire unit with a Hirschman connector.
Since VM has been absorbed by JPI my unit is no longer supported (only the
VM1000C units are still supported) and talking with JPI at Sun N Fun
confirmed my suspicions that they bought VM to remove one of their
competitors from the market. That being the case, I obviously can't get a
software update for the DPU but I might be able to recalibrate the unit to
get some useful information by putting a resistor in parallel with the
sensor to have the 0-10 PSI on the display correspond to 0-30 PSI at the
sensor.
Anyone know the guy who invented the VM1000? Does he, or anyone who used to
work at VM, have knowledge, software source code, assemblers, compilers or
PROM burner for the legacy system? Maybe they lurk on the list and could
help with modifying the software to get my pressure display to work
properly? Just a thought, if I had the tools and software I'd be willing to
support this thing for anybody who has one. Thanks.
Dean Psiropoulos
RV-6A N197DM
2.5 years of fun so far
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recapen(at)earthlink.net
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| Posted: Sat Apr 30, 2011 6:38 pm Post subject: VM1000 sensor question |
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Dean,
There are two different sensors - both use the Hirschmann connector. I had
one of the early VM1000's and ditched it when I saw this coming.
I may have a FI sensor at my hangar - but I may have already parted it
out...I'll check.
Ralph
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recapen(at)earthlink.net
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| Posted: Sat Apr 30, 2011 7:00 pm Post subject: VM1000 sensor question |
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Dean,
My pressure sender is already gone....
Ralph
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Larry Ford
Joined: 06 Mar 2010
Posts: 5
Location: United States
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| Posted: Sat Apr 30, 2011 9:16 pm Post subject: VM1000 sensor question |
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Your man is Lance Turk who started Vision Micro Systems. http://www.jpitech.com/press_releases/Lance_Turk_PR.pdf. He was employed by JPI for supporting the VM line of products when he sold the company to them. I guess it didn't last. I contacted Lance at JPI approx. 2 years ago when an oil pressure transducer began to read 10 psi lower than actual. I found that JPI would sell me a new one but was asking $450 (my recollection) for the Honeywell device. I was able to find the same part at Digikey for around $200 but in minimums of 5. I bought a single unit from Newark for the bargain price of $300 (Yikes!).
I had the same situation when I purchased a fuel injected engine. The fix was to purchase a different transducer- fortunately from VM as they were still in business. I can attempt to read the part number on my transducer to help you in your search. I have the VM 800 with the individual gauges which precedes the 1000 and may use a different transducer. There's a battery in the CPU that maintains the clock and tach time. When it eventually fails, the CPU has to be sent for a component replacement that contains the battery. There is no simple battery replacement according to Lance. Mine has been going 8 years and likely on its last legs. What to do when it goes? When I purchased the system I asked Lance what recourse would owners have if the company folded. He assured me that the proprietary info would be released to those who required it to maintain their systems. Sounds like JPI owns the information now. Welcome to the digital age. Good luck!
Larry Ford
Glasair I RG N149LF
[quote][b]
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