HP Integrity rx8620 Installation Guide, Sixth Edition - HP Integrity rx8620 Se - Page 67

Safety Ground Reference Check - Single Power Source

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Installation Cabling and Power Up Safety Ground Verification (Single Power Source) This procedure measures the voltage level between A0 and A1. The voltage level between B0 and B1 will also be verified. All measurements will be taken between ground pins. Refer to Figure 2-22 for ground reference points when performing these measurements. Figure 2-22 Safety Ground Reference Check - Single Power Source Step 1 V GND L1 L2 A0 Step 2 V GND L1 L2 A1 GND GND L1 L2 B0 L1 L2 B1 Step 1. Measure the voltage between A0 and A1. Take the AC voltage down to the lowest scale on the volt meter. One probe is inserted into the ground pin for A0. The other probe is inserted into the ground pin for A1. Verify that the measurement is between 0-5 VAC. If the measurement is 5 V or greater, escalate the situation. Do not attempt to plug the power cords into the server cabinet. Step 2. Measure the voltage between B0 and B1. Take the AC voltage down to the lowest scale on the volt meter. One probe will be inserted into the ground pin for B0. The other probe will be inserted into the ground pin for B1. Verify that the measurement is between 0-5 VAC. If the measurement is 5 V or greater, escalate the situation. Do not attempt to plug the power cords into the server cabinet. Chapter 2 67

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Chapter 2
Installation
Cabling and Power Up
67
Safety Ground Verification (Single Power Source)
This procedure measures the voltage level between A0 and A1. The voltage level between B0 and
B1 will also be verified. All measurements will be taken between ground pins. Refer to Figure 2-22
for ground reference points when performing these measurements.
Figure 2-22 Safety Ground Reference Check - Single Power Source
Step 1.
Measure the voltage between A0 and A1. Take the AC voltage down to the lowest scale on the volt
meter. One probe is inserted into the ground pin for A0. The other probe is inserted into the ground
pin for A1. Verify that the measurement is between 0–5 VAC. If the measurement is 5 V or greater,
escalate the situation. Do not attempt to plug the power cords into the server cabinet.
Step 2.
Measure the voltage between B0 and B1. Take the AC voltage down to the lowest scale on the volt
meter. One probe will be inserted into the ground pin for B0. The other probe will be inserted into
the ground pin for B1. Verify that the measurement is between 0–5 VAC. If the measurement is 5 V
or greater, escalate the situation. Do not attempt to plug the power cords into the server cabinet.
Step 2
V
GND
L1
L2
L1
L2
GND
B0
B1
A0
GND
L1
L2
V
Step 1
L2
A1
L1
GND