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Temp Gauge Wiring
https://www.ausmini.com/forums/viewtopic.php?f=2&t=91351		 Page 1 of 2
Author:  glenndunn [ Wed Dec 23, 2015 3:01 pm ]
Post subject:  Temp Gauge Wiring
Hi All and Merry Christmas
I am putting in an electrical temp gauge to replace the mechanical one that I have, after wiring the gauge to the sender and to the voltage stabliser the temp gauge went to H within about 1 minute of running the engine where the temp would have been only about 50 c.
So I am getting a new sender and just checked the voltage on my reg all terminals read 12.75 V.
I have heard the these gauges need 10 V to work and some say no they need 12 V.
Can someone enlighten me on exactly how the gauge wires
Author:  DavidE [ Wed Dec 23, 2015 3:35 pm ]
Post subject:  Re: Temp Gauge Wiring
glenndunn wrote:
Hi All and Merry Christmas
I am putting in an electrical temp gauge to replace the mechanical one that I have, after wiring the gauge to the sender and to the voltage reg the temp gauge went to H within about 1 minute of running the engine where the temp would have been only about 50 c.
So I am getting a new sender and just checked the voltage on my reg all terminals read 12.75 V.
I have heard the these gauges need 10 V to work and some say no they need 12 V.
Can someone enlighten me on exactly how the gauge wires


My temp gauges take their power from the 'I' terminal on the voltage stabiliser.

Cheers
Author:  glenndunn [ Wed Dec 23, 2015 3:49 pm ]
Post subject:  Re: Temp Gauge Wiring
DavidE wrote:
glenndunn wrote:
Hi All and Merry Christmas
I am putting in an electrical temp gauge to replace the mechanical one that I have, after wiring the gauge to the sender and to the voltage reg the temp gauge went to H within about 1 minute of running the engine where the temp would have been only about 50 c.
So I am getting a new sender and just checked the voltage on my reg all terminals read 12.75 V.
I have heard the these gauges need 10 V to work and some say no they need 12 V.
Can someone enlighten me on exactly how the gauge wires


My temp gauges take their power from the 'I' terminal on the voltage stabiliser.

Cheers

Thanks David
I can't see any ID on either terminal but as I said I have 12V on both terminals, so makes me think my reg is kput
Author:  DavidE [ Wed Dec 23, 2015 4:06 pm ]
Post subject:  Re: Temp Gauge Wiring
glenndunn wrote:
DavidE wrote:
glenndunn wrote:
Hi All and Merry Christmas
I am putting in an electrical temp gauge to replace the mechanical one that I have, after wiring the gauge to the sender and to the voltage reg the temp gauge went to H within about 1 minute of running the engine where the temp would have been only about 50 c.
So I am getting a new sender and just checked the voltage on my reg all terminals read 12.75 V.
I have heard the these gauges need 10 V to work and some say no they need 12 V.
Can someone enlighten me on exactly how the gauge wires


My temp gauges take their power from the 'I' terminal on the voltage stabiliser.

Cheers

Thanks David
I can't see any ID on either terminal but as I said I have 12V on both terminals, so makes me think my reg is kput


If you're getting 12v on both terminals on the voltage stabiliser, then it's certain that the 10v output is cactus. I've just had another one repaired with a LM2940T-10.0 used to replace the analogue innards. $6.34 from the UK.
www..britishv8.org/article/mgb-voltage-stabilizer.htm
Cheers
Author:  minijcar [ Wed Dec 23, 2015 6:15 pm ]
Post subject:  Re: Temp Gauge Wiring
New smiths regs in the original tin can are available in Australia for $25
Author:  DavidE [ Wed Dec 23, 2015 6:43 pm ]
Post subject:  Re: Temp Gauge Wiring
minijcar wrote:
New smiths regs in the original tin can are available in Australia for $25


C'est la Vie
Author:  minijcar [ Wed Dec 23, 2015 7:21 pm ]
Post subject:  Re: Temp Gauge Wiring
Unfortunately Premier Instruments in Canberra closed recently.
A little ironic.
Be aware of a few things
It is difficult to accurately test the output of a bimetal regulator.
Solid state regulators do not always have an accurate 10volt output.
A 5% error can result in a 20c temperature error at mid scale.
Earthing of a voltage regulator is extremely important for its lifespan.
Make sure the cork plugs are in the back of a bimetal gauge.
A temp sender is a piece of wire that works or it doesn't work; it NEVER goes out of calibration from new specs.
Author:  DavidE [ Thu Dec 24, 2015 6:10 am ]
Post subject:  Re: Temp Gauge Wiring
minijcar wrote:
Unfortunately Premier Instruments in Canberra closed recently.
A little ironic.
Be aware of a few things
It is difficult to accurately test the output of a bimetal regulator.
Solid state regulators do not always have an accurate 10volt output.
A 5% error can result in a 20c temperature error at mid scale.
Earthing of a voltage regulator is extremely important for its lifespan.
Make sure the cork plugs are in the back of a bimetal gauge.
A temp sender is a piece of wire that works or it doesn't work; it NEVER goes out of calibration from new specs.


I would advise that Premier Instruments closed up shop longer ago than "recently". I would put it at two years or thereabouts.I don't know about irony, but it certainly is disappointing that we don't have an instrument repair shop here in Canberra (or the small appliance repair service that they used to provide).
Cheers
Author:  drmini in aust [ Thu Dec 24, 2015 6:31 am ]
Post subject:  Re: Temp Gauge Wiring
If you want a good cheap electronic one without making your own, PM `wombat' on here.
He does one with flying leads fitted, plug and play.
Author:  glenndunn [ Thu Dec 24, 2015 6:42 am ]
Post subject:  Re: Temp Gauge Wiring
Thanks for all your help, I have a 67 Cooper S with a MK 2 binnacle so the wiring has been hacked abit. I'm thinking my fuel gauge works ok so if I'm getting 12 v out of my voltage stabiliser and my fuel gauge works ok then my temp gauge should work on 12v any thoughts ?
Author:  drmini in aust [ Thu Dec 24, 2015 6:59 am ]
Post subject:  Re: Temp Gauge Wiring
The fuel gauge works properly on 10V, not 12.
The temp gauge wiring comes from the same [10V] terminal on the stabiliser.
No Cooper S here had gauges using 12V, although Smiths sold aftermarket gauges that did.
Author:  DavidE [ Thu Dec 24, 2015 7:06 am ]
Post subject:  Re: Temp Gauge Wiring
minijcar wrote:
New smiths regs in the original tin can are available in Australia for $25


Posted to the buyer's location?
Author:  glenndunn [ Thu Dec 24, 2015 9:31 am ]
Post subject:  Re: Temp Gauge Wiring
Thanks Dr if my fuel gauge needs 10 v to work why is it working on 12v or is it not accurate, it seems to be ?
Author:  minijcar [ Thu Dec 24, 2015 9:40 am ]
Post subject:  Re: Temp Gauge Wiring
In the world of established trades 2 years is recently.
Time is not gauged in the number of Apple iPhone firmware updates
To spell out why it is ironic that they closed is that David E and others in Canberra no longer have an instrument or small appliance business to call upon locally, in part because people go to the other side of the world to buy their items.
On the issue of postage informed individuals realize that freight inside Australia is particularly expensive because we as a nation have signed on to an international treaty that means that freight from Outside Australia can be delivered more cheaply.
Where are our representatives on this issue based for work? Canberra.
When I discuss instruments in particular I discuss them from the point of being;
An established tradesman;
Particular about originality, fitness for purpose and accuracy;
Accessible both on the net as well as through my bricks and mortar shopfront.
Another ironic thing for Australians is that the founder of a particular mini forum in the Uk shops with me and was nice enough to make reference to it on his forum.
If you want accurate information that I will stand by you are welcome to contact me personally even if you end up going somewhere else to source it.
Author:  DavidE [ Thu Dec 24, 2015 10:15 am ]
Post subject:  Re: Temp Gauge Wiring
minijcar wrote:
I<snip>.


In the world of established trades 2 years is recently.
<Your interpretation, not mine. "at a recent time; not long ago."
Time is not gauged in the number of Apple iPhone firmware updates
<Huh?
To spell out why it is ironic that they closed is that David E and others in Canberra no longer have an instrument or small appliance business to call upon locally, in part because people go to the other side of the world to buy their items.
<I will buy wherever I can get what I want. I could only find a ready seller of the IC I wanted to modify my Voltage <Stabiliser in the UK. This is a generic electronic part that is not specific to classic Minis, which is my interest. The sum <outlaid was $6.34 which enabled me, for all intents and purposes, to keep the original (repeat original) voltage stabiliser in <my newly restored car without having to buy a current production item.
<As for the small appliance repair side of the business we used to rely upon them after SASCo closed up shop here some <years earlier. That side of the business was a service business and they sourced whatever parts they needed from where <they chose or were able.
On the issue of postage informed individuals realize that freight inside Australia is particularly expensive because we as a nation have signed on to an international treaty that means that freight from Outside Australia can be delivered more cheaply.
Where are our representatives on this issue based for work? Canberra.
<What has this to do with the matter? I am simply a resident of Canberra, nothing else.
When I discuss instruments in particular I discuss them from the point of being;
An established tradesman;
Particular about originality, fitness for purpose and accuracy;
Accessible both on the net as well as through my bricks and mortar shopfront.
Another ironic thing for Australians is that the founder of a particular mini forum in the Uk shops with me and was nice enough to make reference to it on his forum.
<Well that's the way it should be.
If you want accurate information that I will stand by you are welcome to contact me personally even if you end up going somewhere else to source it.
<I called the other day (if I have guessed correctly who you are) and all I got was a flippant answer from the person who <answered the phone. I decided to go elsewhere with my business.
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