Expert’s answer: Do you need to do a loop test to check communication?

Not really. You can skip the old loop test with the 4-20mA generator. If you have a digital network and the device can communicate with the control system, then you’re good to go.

loop test
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However, you need to pull the process values from the field into the control system, and you can simulate that. You can use the device display, handheld, or laptop to do the simulation. Just create an output process value and confirm that the value made it to the control system.

For more information, check the links below:

4-20 mA loop test

I’m working in a plant startup, and I need to do the test on all our 4-20 mA field devices. Do I need to?

Yokogawa AXR loop test

I have 10 field flow meters from Yokogawa, and I’d like to do tests directly on the display, instead of a field communicator. Could you give me the step by step?

Promag 400 loop test!
I want to do a test on my Promag 400. How can I do it using the display directly?
ROTAMASS 3 loop test
Can I do testing with the ROTAMASS 3 using the display?
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