Use the segment checkout procedure to check each segment for proper
power, grounding, and isolation before you commission field devices on the
segment.
- First, measure resistance,
capacitance, DC voltage, and the AC waveform (steps 1, 2, and 3 in the checkout
procedure) with simplex power installed.
- Then measure DC and the AC
waveform (steps 4 and 5) again with redundant power installed. Verify that the
measured DC voltage allows for the additional voltage drop if a short circuit
should occur.
- Record the readings for
steps 1-5 on the Fieldbus Checkout Form.