Quote:
Originally Posted by toomany MBZ
I believe the above poster has misplaced a couple of zeros.
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Yes and no. It would be silly to get hung up on the exact resistance measurement. It is more of a binary measurement (yes/no). If bad, you will read infinity. If good, you will read less resistance than your ohm-meter can resolve. I said <100 ohm because simple. Always short DMM leads to get a "zero", which might be 5 ohm on some. Then you have wiring and "poor contact" resistance.
If really interested, there are many details to a simple resistance heater. They can short internally so it gets hot in the middle, not at the tip where you want it. You would have to look down the injector hole or test one in the air to see that. The cold resistance just verifies continuity. As it heats up, the resistance greatly increases. If you calculated expected power (P=V^2/R) from the cold resistance, you would get an unreasonably high value. Ditto for an incandescent light bulb.