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re: What if I told you the most sensitive thermocouples, heat flux sensors, and radiometers...
Posted on 2/2/24 at 7:43 pm to Mr Breeze
Posted on 2/2/24 at 7:43 pm to Mr Breeze
quote:
That’s some 1970’s analog looking test gear.
There's things analog instruments can do better than modern digital instruments. Especially when it comes to testing other analog equipment. Mr. Carlson's Lab is a great resource for learning how good that old equipment is.
2
Posted on 2/2/24 at 8:17 pm to Clames
quote:
There's things analog instruments can do better than modern digital instruments. Especially when it comes to testing other analog equipment. Mr. Carlson's Lab is a great resource for learning how good that old equipment is.
This is true. One of the things I would be helping with is how to upgrade it, but still have the same abilities, etc.
Posted on 2/2/24 at 8:23 pm to NATidefan
Posted on 2/2/24 at 8:33 pm to Lonnie Utah
RTD's......resistance thermocouple device. The early machines measured resistance, OHMs as a function of temperature.
Posted on 2/2/24 at 8:34 pm to NATidefan
MEDTHERM makes good shite baw!
Posted on 2/2/24 at 8:57 pm to NATidefan
When I worked in firmware development, we used to joke that the technical skill of the client was inversely proportional to the sexiness of their facility.
At the extreme end, you had places with 2-3 engineers driving cheap cars long distances to manufacture shite like cruise ship autopilots to the accompaniment of one of those 1980s wall clocks. Those people aren't in it for the money.
At the extreme end, you had places with 2-3 engineers driving cheap cars long distances to manufacture shite like cruise ship autopilots to the accompaniment of one of those 1980s wall clocks. Those people aren't in it for the money.
Posted on 2/2/24 at 9:05 pm to Good Ole Baw
They sure do.
Posted on 2/2/24 at 9:15 pm to NATidefan
quote:
were made by a very small business in a shop by about 6 people that looks ALOT like this.
And made solely by black women who got no credit
Posted on 2/2/24 at 9:17 pm to Volvagia
quote:
That “is” was supposed to be “isn’t”
Corrected. Even though the context should have made the point fairly clear.
I don't know what it is but when I am typing fast it is not unusual for me to leave out a "not". Sometimes even if I proof it my brain adds the "not" when I read it even though it isn't there. More than once I have come back to a post later and realized I effectively said the opposite of what I meant, but as you mention normally the context indicates the "not" was supposed to be there.
Posted on 2/2/24 at 9:18 pm to biglego
quote:
And made solely by black women who got no credit
Lol, nope older white guys. They actually just hired their first female.
But I will say alot of delicate type stuff like that is made by black ladies that don't get alot of credit. I work with a lot of solder repair techs and that does describe most of them.
This post was edited on 2/2/24 at 9:19 pm
Posted on 2/2/24 at 9:20 pm to Obtuse1
quote:
I don't know what it is but when I am typing fast it is not unusual for me to leave out a "not". Sometimes even if I proof it my brain adds the "not" when I read it even though it isn't there. More than once I have come back to a post later and realized I effectively said the opposite of what I meant, but as you mention normally the context indicates the "not" was supposed to be there.
I'm the same, I type slower than I think and leave words out and make grammatical errors etc.
Posted on 2/2/24 at 9:35 pm to NATidefan
quote:
Two wires of a different material create a voltage and that is translated into a temp reading. Not very complicated.
Like I said the idea isn't complicated, but their sensitivity etc is very complicated.
No one else in the world has been able to duplicate them or even come close and lots have tried including SpaceX.
So, it's not as simple as some of you want to make out.
Eta, the size is also important. The main sensor that is embedded in most of the projects is the size of a grain of rice.
There are millions of guitars in the world, but only a few that were hand-built by Martin, Gibson, Paul, Fender.
There are millions of violins in the world, but only a few were hand-built by Stradivarius.
There are people who have a gift to build extraordinary things using only the basic tools, and their God given talent.
Think of it that way.
Posted on 2/2/24 at 9:40 pm to Clames
quote:
That’s some 1970’s analog looking test gear.
There's things analog instruments can do better than modern digital instruments. Especially when it comes to testing other analog equipment. Mr. Carlson's Lab is a great resource for learning how good that old equipment is.
Believe it or not, there are still a lot of things in brand new vehicles that require using a simple oscilloscope to determine if a duty cycle or pulse signal is present/correct.
A DVM is useless in those situations except for telling you that, yes, voltage is present.
Posted on 2/2/24 at 9:43 pm to tiggerfan02 2021
quote:
There are people who have a gift to build extraordinary things using only the basic tools, and their God given talent.
Think of it that way
Part of it is the guys and their abilities.
Part of it is "technology" that the guy that invented these sensors developed.
Either way it is very special.
Posted on 2/2/24 at 9:45 pm to tiggerfan02 2021
quote:
Believe it or not, there are still a lot of things in brand new vehicles that require using a simple oscilloscope to determine if a duty cycle or pulse signal is present/correct.
A DVM is useless in those situations except for telling you that, yes, voltage is present.
Well no shite, DVM are useless for measuring anything related to time, which many electrical signals are.
There are very good modern digital oscilloscopes, logic analyzers, etc though.
This post was edited on 2/2/24 at 9:47 pm
Posted on 2/2/24 at 10:06 pm to upgrade
quote:
Without looking it up, what are the principles of a thermocouple
Two wires of dissimilar metals are connected at each end. When one of the junctions is heated or cooled a voltage, proportionate to the temperature, results. We measure this voltage and convert it to temperature.
Posted on 2/2/24 at 10:58 pm to NATidefan
quote:
Well no shite, DVM are useless for measuring anything related to time, which many electrical signals are.
There are very good modern digital oscilloscopes, logic analyzers, etc though.
I meant that as general information, not calling you a dumbass.
Ask around and see how many people think cars just "talk" to everything like laptops and PCs, and all you have to do is "hook the machine up to it" to get all the answers.
Posted on 2/3/24 at 2:51 am to Trevaylin
quote:
RTD's......resistance thermocouple device. The early machines measured resistance, OHMs as a function of temperature.
RTD stands for resistance temperature detector. RTDs are not thermocouples; they operate on a completely different principle.
Thermocouples and RTDs were actually invented at roughly the same time. It’s becoming more common to see RTDs nowadays due to generally higher accuracy/sensitivity, although thermocouples are still much more common overall due to lower cost, higher range, and lower susceptibility to mechanical damage from vibrations or impacts.
Basically they are both used in different applications. Heat tracing applications use RTDs almost exclusively because 100 ohm platinum RTDs are accurate enough out of the box to use with no calibration and can be connected to control systems using regular instrument cable (as opposed to TC wire).
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