Paramour SBS box mod TCR question

[Jerzy]

I've recently bought a Paramour SBS box mod. I'm a TC fan...but the TCR setting on the mod has completely thrown me! If I want to set the TCR to 0.00092, what figure between 500 and 8000 do I need to set the mod at?

 

[Netvaper]

As a reply doesn't seem to be forthcoming and I don't know a lot about TC what's the 500 to 8000?

 

[Deleted member 54254]

The TCR.

Ni200: 0.00620
Ti01: 0.00350
SS316L: 0.00092
SS316: 0.000915
SS317L: 0.00088
SS317: 0.000875
SS304: 0.00105
SS430: 0.00138
SS410: 0.00155
SS904L 0.00077
NiFe30 (Resistherm): 0.00320
NiFe30 (Stealthvape): 0.00500
NiFe48 (CWC): 0.00310
NiFe52 (CWC): 0.00340
NiFe70 (CWC): 0.00500
Tungsten: 0.00450
Platinum: 0.00392
Nichrome: 0.00040
Gold: 0.00340
Iron: 0.00500
Silver: 0.00380

 

[Deleted member 54254]

As an aside, I seem to remember the Paramour being shite for TC, I offloaded it due to that as that's what I use predominantly. Maybe best stick with wattage.

 

[Jerzy]

As a reply doesn't seem to be forthcoming and I don't know a lot about TC what's the 500 to 8000?

On the mod, when you go into TC mode you get the options of SS, NI, TI or TCR. If you select TCR, the screen shows "TCR 500" and you can increase that figure up to a maximum of 8000.

On, say, a Geekvape mod, I would put it in TCR mode and simply set the mod to 0092 in order to get an actual TCR of 0.00092.

On a SXmini mod, in TCR mode it displays the full figure including the decimal point, so the screen will show 0.00092.

On the Paramour, though, in TCR mode the mod can be set anywhere from 500 to 8000, but there's no indication in the manual as to how the figures displayed correspond to temperature coefficients of resistance.

As an aside, I seem to remember the Paramour being shite for TC, I offloaded it due to that as that's what I use predominantly. Maybe best stick with wattage.

To be honest, having tried selecting SS in TC mode on it, I wasn't overly impressed. It's working an absolute treat in wattage and voltage modes, and has breathed new life into my Siegfried, so I'm not unhappy with it.

 

[Netvaper]

On the mod, when you go into TC mode you get the options of SS, NI, TI or TCR. If you select TCR, the screen shows "TCR 500" and you can increase that figure up to a maximum of 8000.

On, say, a Geekvape mod, I would put it in TCR mode and simply set the mod to 0092 in order to get an actual TCR of 0.00092.

On a SXmini mod, in TCR mode it displays the full figure including the decimal point, so the screen will show 0.00092.

On the Paramour, though, in TCR mode the mod can be set anywhere from 500 to 8000, but there's no indication in the manual as to how the figures displayed correspond to temperature coefficients of resistance.

Ah I see, seems very odd it gives an option to enter a TCR but the range doesn't seem to correspond to one.

 

[Deleted member 54254]

I'd go on the premise its as whacked out as the Pulse AIO, when it's set for SS is comes up with about 1100 iirc, but setting it to 1200 works better, sometimes you just need to work it up and down to get it where it vapes how you expect.

 

[Jerzy]

Ah I see, seems very odd it gives an option to enter a TCR but the range doesn't seem to correspond to one.

Well, entering a TCR value isn't all that unusual; all my mods that do SS (with just an option for stainless steel, not any particular alloy) automatically set the value to 105 which corresponds with SS304. Having a separate setting for TCR allows you to input the proper values for SS316 or SS316L (which differ slightly).
However, as you've noted, having a range that goes from 500 to 8000 doesn't seem to correspond with anything.
To make it even more confusing, Ecigone have told me that 0.00092 "probably" needs me to set the mod to somewhere between 1100 and 1300 but also advised me to speak to Mechlyfe for confirmation. I emailed Mechlyfe...and they've told me to "try between 3000 and 6000"!
I am, therefore, still none the wiser.

I'd go on the premise its as whacked out as the Pulse AIO, when it's set for SS is comes up with about 1100 iirc, but setting it to 1200 works better, sometimes you just need to work it up and down to get it where it vapes how you expect.

John, do you happen to know how the Pulse's settings correlate to TCR values? Is there a formula for converting the figures?

 

[Jerzy]

So...after some searching, I discovered this:

Question :
How to measure Temperature Coefficient of Resistance (TCR)?

Answer :
The Temperature Coefficient of Resistance, or TCR, is a measurement of a resistor's change in resistance per change in temperature. It is typically measured in ppm/°C, that is, parts-per-million change in ohms per change of 1 degree centigrade.
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So, now that I know what Mechlyfe are talking about, I need to find some way of converting the ppm/°C measurements of various wires to the TCR values we are more used to seeing in vaping; that's lead me to this:

Understanding Resistors and Temperature:
A resistor's Temperature Coefficient of Resistance (TCR) tells how much its value changes as its temperature changes. It is usually expressed in ppm/°C (parts per million per degree Centigrade) units. What does that really mean?

Let's use an example: Riedon's 50 ohm 100 Series precision resistor has a (standard) TCR of 20ppm/°C. That means its resistance will not change more than 0.000020 ohms (20.1,000,000) per ohm per degree Centigrade temperature change (within the rated temperature range of -55 to +145°C, measured from 25°C room temperature.)

Assume our resistor is in a product that heats up from room temperature to 50°C. To find our 50W resistor's (maximum) change caused by that 25°C rise, multiply 0.000020 times 50 (the resistor value) times 25 (the temperature change.) The resistor's value would change no more than 0.025 ohms. (0.000020 X 50 X 25 = 0.025W.)
_____

It would appear that I may finally be on the road to enlightenment, though I'm going to have to get a calculator and good old-fashioned paper & pencil out and see if I can puzzle my way through. Maths was never my strong point...

 

[Netvaper]

^^ Blimey, all sounds way too technical for me but good luck.