A multimeter cannot measure the 2W SIM current indicated in the Fluke 744 in source mode
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I wonder why this is the case; please give some guidance
Is a 744 used to output an mA signal? The 744 has two modes for outputting mA signals; one option is Source mA, which outputs a DC mA signal ； Another option is Simulate Transmitter; in this case, the 744 outputs a variable resistance value to adjust the current to a specified level.
Yeah, right. Is the other one one with a variable resistance value? I just don’t know what type of value it outputs, and I haven’t dared to test it; the instructions don’t mention anything either. Well, thanks for your answer. I’ll try to test it tomorrow to see if it’s a resistor
By the way, I have another question: when we transmit signals, there is often a distinction between positive and negative poles. However, in simulation mode where it’s just a variable resistor, there is no such distinction between positive and negative. Have you encountered this situation before? How can it be explained?