Figure 2-24 Safety Ground Reference Check - Dual Power Source - HP Integrity rx8640 Installation Manual

Installing the System
Cabling and Powering On the Server
2. Insert the probe into the ground pin for A0.
3. Insert the other probe into the ground pin for A1.
4. Verify that the measurement is between 0-5 V AC.
If the measurement is 5 V or greater, escalate the situation. Do not attempt to plug the power cord
into the server cabinet.
Step 2. Measure the voltage between B0 and B1 as follows:
1. Take the AC voltage down to the lowest scale on the volt meter.
2. Insert the probe into the ground pin for B0.
3. Insert the other probe into the ground pin for B1.
4. Verify that the measurement is between 0-5 V AC.
If the measurement is 5 V or greater, escalate the situation. Do not attempt to plug the power cord
into the server cabinet.
Verifying the Safety Ground (Dual Power Source)
Use this procedure to measure the voltage level between A0 and A1, between B0 and B1, between A0 and B0,
and between A1 and B1. Take all measurements between ground pins. Refer to Figure 2-24 for ground
reference points when performing these measurements.
Figure 2-24 Safety Ground Reference Check — Dual Power Source
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Chapter 2