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I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old appliance.
Tubing like this:
http://www.ebay.com.au/itm/MICRO-BRASS-TUBE-ASSTD-SLIDE-FIT-PACK-0-3-0-5-0-7-0-9mm-TUBES-SFT2-/310841045453?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item485f91f1cd
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal block,
the copper will centre the lead, fill up the gaps and protect the lead from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
On 22/01/2014 10:04 PM, Jasen Betts wrote:
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a
gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite
difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how
thick
the leads are - I'd need a micrometer to measure, and I don't
have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old
appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal block,
the copper will centre the lead, fill up the gaps and protect the lead
from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
Thanks for the thoughts. I think I'll skip the brazing idea, since I
don't in fact own any of that stuff. Have to try the coil idea with some
similar gauge copper wire first.
Sylvia.
You could get some copper tube from an old thermostat capillary, that'sOn 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a
gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite
difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have
one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old
appliance.
Tubing like this:
http://www.ebay.com.au/itm/MICRO-BRASS-TUBE-ASSTD-SLIDE-FIT-PACK-0-3-0-5-0-7-0-9mm-TUBES-SFT2-/310841045453?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item485f91f1cd
The 0.3mm might do, but it's not so cheap.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
I'll try implementing a clamp using a pair of nuts, a bolt and some
washers.
Sylvia.
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how thick
the leads are - I'd need a micrometer to measure, and I don't have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal block,
the copper will centre the lead, fill up the gaps and protect the lead from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
I used the coil technique, and it worked. Thanks for that.
For the record, I ran this cheap Sunbeam benchtop oven until the sensor
showed 240degrees, and then turned the power off. The temperature
continued to rise, peaking at 257 degrees.
On 22/01/2014 10:04 PM, Jasen Betts wrote:
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a
gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite
difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how
thick
the leads are - I'd need a micrometer to measure, and I don't
have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old
appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal block,
the copper will centre the lead, fill up the gaps and protect the lead
from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
I used the coil technique, and it worked. Thanks for that.
For the record, I ran this cheap Sunbeam benchtop oven until the sensor
showed 240degrees, and then turned the power off. The temperature
continued to rise, peaking at 257 degrees.
Even without any monitoring, I was able to get a board to reflow (double
sided at that), and work, though whether it would be reliable in the
long term is another question.
Sylvia.
My way would have worked.On 23/01/2014 1:31 PM, Sylvia Else wrote:
On 22/01/2014 10:04 PM, Jasen Betts wrote:
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a
gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite
difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how
thick
the leads are - I'd need a micrometer to measure, and I don't
have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old
appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the
device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal
block,
the copper will centre the lead, fill up the gaps and protect the lead
from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
I used the coil technique, and it worked. Thanks for that.
For the record, I ran this cheap Sunbeam benchtop oven until the sensor
showed 240degrees, and then turned the power off. The temperature
continued to rise, peaking at 257 degrees.
Even without any monitoring, I was able to get a board to reflow (double
sided at that), and work, though whether it would be reliable in the
long term is another question.
Sylvia.
However, lest anyone else rushes out and tries this, I should say that I
now think that the porcelain terminal block approach is not the way to
go, because the block has so much thermal inertia, and the sensor is
very close to it. This is likely the source of the overshoot I mentioned.
It's particularly noticeable during cooling. When sensor still shows
over 100C, the aluminium tray is cool enough to touch. At that point the
terminal block isn't despite having a much lower thermal conductivity,
which would make it feel cooler.
Sylvia.
On 23/01/2014 1:31 PM, Sylvia Else wrote:
On 22/01/2014 10:04 PM, Jasen Betts wrote:
On 2014-01-22, Sylvia Else <sylvia@not.at.this.address> wrote:
On 22/01/2014 5:41 PM, Kennedy wrote:
On 22/01/2014 2:18 PM, Sylvia Else wrote:
On 22/01/2014 4:42 PM, Kennedy wrote:
On 22/01/2014 11:52 AM, Sylvia Else wrote:
On 22/01/2014 2:36 PM, F Murtz wrote:
Sylvia Else wrote:
On 22/01/2014 7:18 AM, Trevor Wilson wrote:
On 21/01/2014 12:47 PM, Sylvia Else wrote:
I need something like this:
http://australia.rs-online.com/web/p/solders/0556503/
But my total lifetime requirement is probably a fraction of a
gram.
Anyone know of a supplier of smaller quantities?
Sylvia.
**What is the application?
Attaching one of these:
http://australia.rs-online.com/web/p/platinum-resistance-temperature-sensors/6117801/
to monitor the temperature inside a DIY reflow oven.
I was originally going to use a porcelain terminal block, but the
leads
are so thin, and also not very long, so it's proving quite
difficult.
Sylvia.
Why not crimp?
Presupposes I can find a suitable lug, and I'm not even sure how
thick
the leads are - I'd need a micrometer to measure, and I don't
have one.
Sylvia.
Just get a small piece of brass tube from any hobby shop & make your
own. Only a couple of dollars.
Easy peasy!
Looks like I'd need tubing with an inner diameter of about 0.2 mm.
Sylvia.
Why wouldn't you use some scrap teflon sheathed multi-strand wire or
similar to connect to the sensor? That would be a lot easier than
running 0.2mm single strand out of the oven.
Maybe scab up some fiberglass insulation sleeving out of an old
appliance.
My problem is not the wiring from the sensor, but connecting the sensor
the wiring. Ordinary solder will clearly melt while the oven is in use.
The high temperature stuff Trevor says won't be reliable, and the
device
leads laugh at the gap left by the screw terminals in the porcelain
terminal block.
The best way is spot welding, take it to battery-pack rebuilder.
You could try brazing the leads, $10 pencil torch, $5 butane
refill, $10 brazing rod, $15 borax flux, you may own some of that
already.
another option wind a coil of 24 AWG bare copper (ex CAT5 cable) on
a 0.5mm-ish former (eg: the lead of a 1n914 diode, or a tailor's pin)
pass the RTD lead through that coil the put both into the terminal
block,
the copper will centre the lead, fill up the gaps and protect the lead
from
the terminal block screw.
if using nuts and washers washers use three
make the middle one oversize (or ream its hole a bit)
and pass the lead through it too.
I used the coil technique, and it worked. Thanks for that.
For the record, I ran this cheap Sunbeam benchtop oven until the sensor
showed 240degrees, and then turned the power off. The temperature
continued to rise, peaking at 257 degrees.
Even without any monitoring, I was able to get a board to reflow (double
sided at that), and work, though whether it would be reliable in the
long term is another question.
Sylvia.
However, lest anyone else rushes out and tries this, I should say that I
now think that the porcelain terminal block approach is not the way to
go, because the block has so much thermal inertia, and the sensor is
very close to it. This is likely the source of the overshoot I mentioned.
It's particularly noticeable during cooling. When sensor still shows
over 100C, the aluminium tray is cool enough to touch. At that point the
terminal block isn't despite having a much lower thermal conductivity,
which would make it feel cooler.
Sylvia.