2007-11-02 01:35:39 · 3 answers · asked by chinese_helicopter 2 in Science & Mathematics ➔ Engineering
Voltmeters are always (generally) connected from ground, with the black lead, and to the point of interest with the red lead. The meter should be on V position for DC volts with the straight line markings and not the wiggly line, as that is AC. Make sure the voltage setting is higher than the voltage of interest, but not so high you lose the ability to see tenths of a volt.
Ground is generally found on the outside of a BNC connector or a screw that sticks out on the case, but that is unreliable. The output should have two connections, so the outer one will usually be ground.
2007-11-02 01:47:20 · answer #1 · answered by Warren W- a Mormon engineer 6 · 1⤊ 0⤋
Voltmeter needs to be set at DCV one lead on output connection and the other on the opposite polarity from the output, usually obtained from the power supply or module. Do not forget to make sure to check when the PLC has turned the output on as there will be no reading until then.
2007-11-02 15:41:45 · answer #2 · answered by Anonymous · 1⤊ 0⤋
There are few types of output for PLC output module, potential free contact , solid state source or sink , depend on the type of output we need to measure accordingly. Usually, PLC output module need a power supply especially solid state 24 VDC output. If you can provide circuit diagram of your PLC output module I can exactly tell you how to measure.
2007-11-02 16:22:24 · answer #3 · answered by dwarf 3 · 1⤊ 0⤋