Warning indicates a hazardous situation which if not

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WARNING Indicates a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. NOTICE Addresses practices not related to personal injury. Customer Upgrade Procedure 2 Unity Family Customer Upgrade Procedure Page 7 of 31
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Note Presents information that is important, but not hazard-related. Handling replaceable units This section describes the precautions that you must take and the general procedures that you must follow when removing, installing, and storing any replaceable unit. Avoiding electrostatic discharge (ESD) damage When replacing or installing hardware units, you can inadvertently damage the sensitive electronic circuits in the equipment by simply touching them. Electrostatic charge that has accumulated on your body discharges through the circuits. If the air in the work area is very dry, running a humidifier in the work area will help decrease the risk of ESD damage. Follow the procedures below to prevent damage to the equipment. Be aware of the following requirements: l Provide enough room to work on the equipment. l Clear the work site of any unnecessary materials or materials that naturally build up electrostatic charge, such as foam packaging, foam cups, cellophane wrappers, and similar items. l Do not remove replacement or upgrade units from their antistatic packaging until you are ready to install them. l Before you begin service, gather together the ESD kit and all other materials you will need. l Once servicing begins, avoid moving away from the work site; otherwise, you may build up an electrostatic charge. l Use ESD anti-static gloves or an ESD wristband (with strap). If using an ESD wristband with a strap: n Attach the clip of the ESD wristband to the ESD bracket or bare metal on a cabinet/rack or enclosure. n Wrap the ESD wristband around your wrist with the metal button against your skin. n If a tester is available, test the wristband. Emergency procedures (without an ESD kit) In an emergency when an ESD kit is not available, use the following precautions to reduce the possibility of an electrostatic discharge by ensuring that your body and the subassembly are at the same electrostatic potential. NOTICE These precautions are not a substitute for the use of an ESD kit. Follow them only in the event of an emergency. l Before touching any unit, touch a bare (unpainted) metal surface of the cabinet/ rack or enclosure. l Before removing any unit from its antistatic bag, place one hand firmly on a bare metal surface of the cabinet/rack or enclosure, and at the same time, pick up the Adding an optional 25-drive DAE Handling replaceable units 3 Page 8 of 31
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unit while it is still sealed in the antistatic bag. Once you have done this, do not move around the room or touch other furnishings, personnel, or surfaces until you have installed the unit.
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  • Fall '19
  • Electrostatic discharge, EMC Corporation

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