Quintum Technologies Tenor Call Relay SP - Manual (Page 40)

3-10 P/N 480-0048-00-10
Chapter 3: Installation
Prevent Electrostatic Discharge
Providing ground to the system prevents Electrostatic Discharge (ESD) to the chassis and cards. ESD damage
occurs as a result of improperly handled electronic components. Although the chassis is metal and provides
shielding to protect the CPU card from ESD, it is important than an antistatic ESD wrist strap be worn when
handling the CPU card, or any other Call Relay SP equipment. In addition, the chassis offers a supplementary
Earth Ground post to provide earth ground to the chassis, in case the power cord safety earth ground is not
available or as a secondary supplemental earth ground path.
ESD Antistatic Wrist Strap
The ESD antistatic wrist strap is worn on your wrist when handling any of the components. Use the following
precautions when using the ESD strap:
• When handling the CPU card, touch only the edges. Do not touch any other components on the board,
including the connector pins.
• Place the card in a static shielding bag or on an antistatic surface.
• Avoid any component touching your clothing. The Ground Strap protects components from ESD on the
body; ESD damage from clothing is still possible.
Use the Ground Strap as follows:
1. Place the wrist strap end of the ESD strap around your wrist. Ensure strap fits snugly around your wrist
and the metal contact is against your skin.
2. Plug in the other end to either of the Ground Strap ports located on the chassis (front and rear).
Provide Grounding
The chassis provides an Earth Ground post to provide an additional connection to an approved safety earth
ground. Connect earth ground to the post on the rear of the chassis called Supplemental Earth Ground.