ECN Forum Forums General Topics of the Trade General Discussion Area Instrumentation Loops 4-20ma 1-5 volts

If you have a instrument loop consisting of a transmitter with a 4-20ma output going into a DCS (process control computer) if the transmitter has a 0% output and you place a VOLTMETER accross its terminals what will voltmeter read ? 1 volt or power supply voltage? Same loop with 100% output will the voltmeter read 5 volts or power supply voltage? THANKS