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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 -----
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
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 -----
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
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
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)
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