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Chapter
ESD Safety Standards
45
ESD Safety Standards
Static charges (voltage levels) occur when objects are separated or rubbed together. The voltage level of a
static charge is determined by the following factors:
•
Types of materials
•
Relative humidity
•
Rate of change or separation
Effect of humidity on ESD charge levels
The following table lists charge levels based on personnel activities and humidity levels.
Static protection measures — computer room environments
Follow these precautions to minimize possible ESD-induced failures in the computer room:
•
Maintain recommended humidity level and airflow rates in the computer room.
•
Install conductive flooring (conductive adhesive must be used when laying tiles).
•
Use conductive wax if waxed floors are necessary.
•
Ensure that all equipment and flooring are properly grounded and are at the same ground potential.
•
Use conductive tables and chairs.
•
Use a grounded wrist strap (or other grounding method) and antistatic mats when handling circuit
boards.
•
Store spare electronic modules in antistatic containers.
Static protection measures — office environments
Office areas generally do not offer the same degree of environmental control possible in a computer room.
However, some of the same precautions should be followed:
•
Maintain recommended humidity level and airflow rates in the office.
Activity
a
a. Source: B.A. Unger, Electrostatic Discharge Failures of Semiconductor Devices (Bell
Laboratories, 1981)
Humidity
b
and charge levels (voltages)
c
b. For the same relative humidity level, a high rate of airflow produces higher static charges
than a low airflow rate.
c. Some data in this table has been extrapolated.
26%
32%
40%
50%
Person walking across a linoleum floor
6,150 V
5,750 V
4,625 V
3,700 V
Person walking across a carpeted floor
18,450 V
17,250 V
13,875 V
11,100 V
Person getting up from a plastic chair
24,600 V
23,000 V
18,500 V
14,800 V
Содержание A4500A - VMEbus Single Board Computer 744 Motherboard
Страница 1: ...rp24xx Hardware Manual ...
Страница 3: ...1 What s New and Using This Information ...
Страница 4: ...Chapter 4 ...
Страница 6: ...Chapter Using rp24xx Server Information 6 ...
Страница 8: ...Chapter What s New 2 ...
Страница 9: ...2 System Hardware Overview and Reference Information ...
Страница 10: ...Chapter 10 ...
Страница 12: ...Chapter System Overview 12 ...
Страница 14: ...Chapter rp24xx Block Diagram 20 ...
Страница 28: ...Chapter hp Server rp24xx Safety and Regulatory Information 36 www docs hp com ...
Страница 29: ...Chapter hp Server rp24xx Safety and Regulatory Information 37 www docs hp com ...
Страница 30: ...Chapter hp Server rp24xx Safety and Regulatory Information 38 www docs hp com ...
Страница 31: ...Chapter hp Server rp24xx Safety and Regulatory Information 39 www docs hp com ...
Страница 32: ...Chapter hp Server rp24xx Safety and Regulatory Information 40 www docs hp com ...
Страница 40: ...Chapter Acoustic Safety Standards 48 ...
Страница 42: ...Chapter Local Computer Installation Codes 50 ...
Страница 44: ...Chapter Altitude Operation Standards 52 ...
Страница 46: ...Chapter Temperature and Humidity Operation Standards 54 ...
Страница 48: ...Chapter Electrical Interference Safety Standards 56 ...
Страница 50: ...Chapter Other Safety Operation Standards 58 ...
Страница 51: ...3 System Site Preparation ...
Страница 52: ...Chapter 60 ...
Страница 54: ...Chapter Cooling Requirements 62 ...
Страница 56: ...Chapter Input Power Requirements 64 ...
Страница 62: ...Chapter Stand Alone Server Site Requirements 70 ...
Страница 64: ...Chapter Temperature and Humidity Operation Standards 72 ...
Страница 65: ...4 Server Unpack and Install Instructions ...
Страница 66: ...Chapter 74 ...
Страница 88: ...Chapter Server Slide Rail Installation 96 ...
Страница 90: ...Chapter Cabinet Installation 98 ...
Страница 96: ...Chapter PowerTrust Uninterruptible Power Supply UPS Option 104 ...
Страница 98: ...Chapter Repackaging the Cabinet for Shipment 106 ...
Страница 102: ...Chapter Unstacking Servers 110 ...
Страница 103: ...5 Operating Instructions ...
Страница 104: ...Chapter 112 ...
Страница 108: ...Chapter Configuring the Guardian Service Processor GSP 116 ...
Страница 110: ...Chapter Initial Power up 118 ...
Страница 112: ...Chapter Boot To Operating System 120 ...
Страница 114: ...Chapter System Power Down 122 ...
Страница 115: ...6 Adding Components to the Server ...
Страница 116: ...Chapter 124 ...
Страница 118: ...Chapter Add Memory 126 ...
Страница 124: ...Chapter Add Disks 132 ...
Страница 129: ...Chapter Adding CPUs and Socket Cleaning 137 NOTE The A400 system supports one CPU the A500 supports two CPUs ...
Страница 130: ...Chapter Adding CPUs and Socket Cleaning 138 ...
Страница 134: ...Chapter LAN Console 142 ...
Страница 144: ...Chapter Secure Web Console I O Card Replacement 152 ...
Страница 145: ...8 Troubleshooting the Server ...
Страница 146: ...Chapter 154 ...
Страница 150: ...Chapter Chassis Code to Customer Replaceable Unit CRU Decode 4 ...
Страница 151: ...9 Server Component Removal and Replacement Procedures ...
Страница 152: ...Chapter 194 ...
Страница 154: ...Chapter Customer Replaceable Unit CRU Physical Location 2 ...
Страница 156: ...Chapter Customer Replaceable Unit CRU Part Numbers 2 ...
Страница 158: ...Chapter Front Bezel Removal 230 ...
Страница 160: ...Chapter Front Bezel Replacement 232 ...
Страница 162: ...Chapter Server Cover Removal 234 ...
Страница 164: ...Chapter Server Cover Replacement 236 ...
Страница 169: ...Chapter HotPlug Disk Drive Removal HPUX Systems Only 241 ccrr003 ...
Страница 170: ...Chapter HotPlug Disk Drive Removal HPUX Systems Only 242 ...
Страница 184: ...Chapter PCI Backplane Removal 256 ...
Страница 186: ...Chapter PCI Backplane Replacement 258 ...
Страница 188: ...Chapter DC DC Converter Removal 272 ccrr010 ...
Страница 190: ...Chapter DC DC Converter Replacement 274 ccrr010 ...
Страница 192: ...Chapter Memory DIMM Removal 276 ...
Страница 194: ...Chapter Memory DIMM Replacement 278 ...
Страница 196: ...Chapter Guardian Service Processor GSP Removal 288 ...
Страница 198: ...Chapter Guardian Service Processor Replacement 290 ...
Страница 200: ...Chapter Extend a Server From the Rack 296 ...
Страница 202: ...Chapter Insert the Server into the Rack 298 ...