How accurate are the devices to start with? That's what I've been wondering anyway.
I'm trying an experiment this week. Basically I've bought some 0,15ohm 5w resistors
5 X RESISTOR, PRECISION, 0.15 OHM 1% Part # VISHAY DALE LVR05R1500FE73 | eBay
It's to test our ohm readers mainly as I've noticed that some of the mass produced ohm readers are deliberately set low to account for rubbish connectors and solder joints. We've pulled the cheap resistance meters for this reason and are just going to sell the pretty ones we make.
So I'm going to pull apart an old carto and solder the resistor in so that *should* give me a nice benchmark reading.
It'll be interesting to set a mod at 5w or below so it doesn't kill the resistor and put one on a mod. For those mods that don't go as low as 5w it's possible that a quick tap of the fire button won't generate enough heat to pop the resistor.
If you guys want me to make an extra couple and do a send to the next person on the list type of thing I can arrange that.
Having seen first hand how much a single solder joint can throw out a TP device and with knowledge that manufacturers offset ohm readers I think there might be some surprises.