stearman456
Joined: 14 Aug 2010
Posts: 49
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 Posted: Wed Oct 12, 2016 10:16 am Post subject: Can One Oil Temp Resistance Bulb Run Two Instruments? |
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Thanks Bob, I expect you're right. I may set up a simple bench-top experiment just to see how much each gauge under reads with the bulb in a pot of boiling water.
Dan
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
To: aeroelectric-list(at)matronics.com
Sent: Wednesday, October 12, 2016 7:22:17 AM
Subject: Re: Can One Oil Temp Resistance Bulb Run Two Instruments?
At 10:03 PM 10/11/2016, you wrote:
| Quote: | --> AeroElectric-List message posted by: "stearman456" <warbirds(at)shaw.ca>
If wired in parallel, can one oil temperature resistance bulb supply oil temperature information to two separate instruments? I can't fathom why it wouldn't if all it basically is is a resistor... The specifics are a Rochester bulb (MS28034-1) installed in the oil tank and wired in parallel to two separate 14v instruments in two open cockpits.
Thanks,
Dan
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Probably not. One thermocouple can be read by
multiple instruments . . . but the calibration
of legacy technologies used by Rochester and
others depends on COMBINED resistance of the
sensor and components built into the gage.
Paralleling two gages would upset the
calibration.
Bob . . .
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