Electromagnetic flowmeter output current
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How to measure the 4–20mA output current of an electromagnetic flowmeter using a digital multimeter
Connect in series into the circuit. . . . . .
It’s a Cologne flow meter; can the current output be measured directly using the milliampere setting of a digital multimeter?
Set the digital multimeter to the mA range, and then connect it in series with the flow meter’s output in order to carry out the measurement.
Many transmitters come equipped with a testing terminal; with this feature, it’s not necessary to disconnect the original circuit – current can be measured directly. If such a terminal is not available, then the original circuit must be disconnected and a multimeter connected in series to take measurements
Such problems can be solved with a little thought. Since it is for measuring current, it must be connected in series; if connected in parallel, only voltage can be measured. How simple the basic circuit principles are.
First of all, to measure current, it is of course necessary to use a multimeter correctly, that is, in series. Secondly, in the event of a fault, four-wire meters can perform fault diagnosis in two ways: by connecting in series within the signal line circuit or by connecting in series between the meter’s signal terminals.