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From: Roger Iverin <roger@iverin.com>
Subject: Re: [LML] Re: Replacement VMS1000 Fuel and Oil Pressure Transducers
 + comment
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Thanks for your info.

I'm looking forward to get my own system and crack it :-)

I actually one time at SunNfun asked all the major MFD makers simple 
question
about the Operation System used, CPU size, RAM, upgradeable.
What happen if I copy the OS etc.

Actually only ONE was open minded. This was Grand Rapids.
All other did not even want to share CPU size.

Roger


On 2013-09-20 14:12, William Rumburg wrote:
> Roger-
> 
> The Vision Microsystems VM1000 obtains oil and fuel pressure by
> sending 5VDC to a transducer, which returns a 0 to 50 millivolt signal
> thats linearly proportional to pressure. All pressure transducer's
> function in a similar manner; however, there are several variations on
> the voltage transmitted and the type of electrical signal that's
> returned. Other systems -including your's- might use that same
> combination, but it's unlikely. You'd have to know the electrical
> parameters for the pressure transducers employed by your MFD before
> seeking a substitute. MFD manufacturer's tend to keep those a secret
> in order to make you a captive customer for replacement transducers.
> 
> Bill Rumburg
> N403 (Sonic bOOm)
> 
> ----- Original Message -----
> FROM: Roger Iverin
> TO: lml@lancaironline.net
> SENT: Wednesday, September 18, 2013 8:32 AM
> SUBJECT: [LML] Re: Replacement VMS1000 Fuel and Oil Pressure
> Transducers
> 
> Hi,
> 
> Are this ones universal and will work on any MFD or monitor?
> 
> Roger
> 
> On 17.09.2013 22:40, william rossmann wrote:
> 
> Okay Bill put me in for the 50 and the 100..
> Bill
> 
> FROM: William Rumburg <lancair403@verizon.net>
> TO: lml@lancaironline.net
> SENT: Tuesday, September 17, 2013 7:42 AM
> SUBJECT: [LML] Re: Replacement VMS1000 Fuel and Oil Pressure
> Transducers
> 
> Bill-
> 
> MSP quoted $138 for a quantity of 1-9 and $125 for 10-50, with a lead
> time of 10-12 weeks and a minimum quantity of 5. These MSP's are high
> quality, direct-replacements for the Honeywells at less than 1/3rd the
> price. Another advantage is that they are furnished with 4 or 10 ft
> pigtails, so they can be directly connected to the DPU; no
> intermediate plug is necessary. It would be a smart move to purchase
> both a 50 and 100psi sensor for immediate replacement of the
> Honeywells or just to have them handy should (when) the Honeywells
> fail.
> 
> Bill Rumburg
> N403WR (Sonic bOOm)
> ----- Original Message -----
> FROM: william rossmann
> TO: lml@lancaironline.net
> SENT: Monday, September 16, 2013 7:52 AM
> SUBJECT: [LML] Re: Replacement VMS1000 Fuel and Oil Pressure
> Transducers
> 
> Hi Bill are both 50 and 100psi MSP sensors $120.00 each..
> Regards Bill
> 
> FROM: William Rumburg <lancair403@verizon.net>
> TO: lml@lancaironline.net
> SENT: Friday, September 13, 2013 9:36 PM
> SUBJECT: [LML] Replacement VMS1000 Fuel and Oil Pressure Transducers
> 
> A couple of years ago, I made a post identifying a superior -and much
> lower cost- Measurement Specialties Products (MSP) transducer as a
> replacement for the Honeywell MediMate transducer that the VMS 1000
> employs for fuel pressure indication. Some tried to use that same
> transducer for oil pressure and reported that it didn't work, yielding
> a value twice the actual oil pressure. Here's why:
> The 50 psi Honeywell unit that VMS employed for fuel pressure has a
> 50mV full output, which equates to 1mV/psi. The 100 psi MSP unit that
> I recommended has a 100mV full output, which also equates to 1mV/psi;
> so it functions perfectly as a replacement for *fuel pressure*.
> The 100 psi Honeywell unit that VMS employs for oil pressure also has
> a 50mV full output but, in this case, that equates to .5mV/psi. With
> it's 1mV/psi output, the same MSP unit will not function for oil
> pressure; it causes an indication double the actual oil pressure.
> As stated in my post a couple of years ago, the Honeywell MediaMate is
> older and inferior technology, prone to failure, and -at over $400- is
> outrageously priced. In contrast, the MSP unit is compact, superior
> and modern technology at only $120.
> There's another, almost identical MSP unit that has a 50mV full output
> and, consequently, will function perfectly for fuel and oil pressure
> in it's 50 and 100 psi versions. Here's the spec sheet:
> http://www.meas-spec.com/downloads/US300.pdf [1]
> Problem is that the combination of it's 5VDC supply voltage and 50 mV
> output is rarely utilized in industry, so there aren't now any
> available. However, I contacted one of MSP's distributors and they
> appear willing to place an order for the 10 unit minimum, provided
> that there's interest.
> Let me know if you're interested, even to purchase one now for future
> use if your current transducer should fail.
> 
> Bill Rumburg
> N403WR (Sonic bOOm)
> 
> 
> 
> Links:
> ------
> [1] http://www.meas-spec.com/downloads/US300.pdf