IMM_Doctor
Senior Member
Capacitance - Check Out FLUKE Website
Capacitance - Check Out FLUKE Website
Capacity... Fluke said it, I AGREE!
"SV225 Stray Voltage Adapter
Stray voltage can appear in electrical installations, due to the capacity between wires. This may result in erroneous readings on high impedance meters."
Before I die, I will make a drawing, (unless another forum member has one handy to paste in), for the "laymen" in order to understand that AC voltages in a residential, commercial, industrial facility, will PASS through a capacitor. An electrician need NOT be an electronics theory guru, but merely understand that and insulated wire is a capacitor and will pass vey low levels of AC current (enough to stimulate a DMM).
What my point is, that the DMM is not measuring GHOSTS or PHANTOMS or STRAY voltages, but actually making a REAL scientific electrical measurement, of AC voltage passing through a capacitor (or wiring system with capacitive properties).
What FLUKE is selling to the casual electrician, is a resistor. This resistor, when placed in parallel with the measured circuit will pass the very low AC current through the resistor itself, and the DMM will read little or no voltage across the resistor.
However, if there is a solid, legitimate continuous current path available, and full voltage is present at the point of the measurement, the resistor will see full voltage, and the DMM will also read full voltage.
Be aware to NOT use the 255 loading resistor when taking "electronic" circuitry measurements, as the 255 loading resistor will pose a BURDEN to the measured circuit, and could contaminate the measurement, and/or, destroy the measured circuit.
Capacitance - Check Out FLUKE Website
Capacity... Fluke said it, I AGREE!
"SV225 Stray Voltage Adapter
Stray voltage can appear in electrical installations, due to the capacity between wires. This may result in erroneous readings on high impedance meters."
Before I die, I will make a drawing, (unless another forum member has one handy to paste in), for the "laymen" in order to understand that AC voltages in a residential, commercial, industrial facility, will PASS through a capacitor. An electrician need NOT be an electronics theory guru, but merely understand that and insulated wire is a capacitor and will pass vey low levels of AC current (enough to stimulate a DMM).
What my point is, that the DMM is not measuring GHOSTS or PHANTOMS or STRAY voltages, but actually making a REAL scientific electrical measurement, of AC voltage passing through a capacitor (or wiring system with capacitive properties).
What FLUKE is selling to the casual electrician, is a resistor. This resistor, when placed in parallel with the measured circuit will pass the very low AC current through the resistor itself, and the DMM will read little or no voltage across the resistor.
However, if there is a solid, legitimate continuous current path available, and full voltage is present at the point of the measurement, the resistor will see full voltage, and the DMM will also read full voltage.
Be aware to NOT use the 255 loading resistor when taking "electronic" circuitry measurements, as the 255 loading resistor will pose a BURDEN to the measured circuit, and could contaminate the measurement, and/or, destroy the measured circuit.