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A Primer on lectro-Static Discharge Teledyne API T703/T703U Calibrator Operation Manual
224
10.4.2. BASIC ANTI-ESD PROCEDURES FOR INSTRUMENT REPAIR AND
MAINTENANCE
10.4.2.1. Working at the Instrument Rack
When working on the instrument while it is in the instrument rack and plugged into a
properly grounded power supply
1. Attach you anti-ESD wrist strap to ground before doing anything else.
Use a wrist strap terminated with an alligator clip and attach it to any bare metal
portion of the instrument chassis.
This will safely connect you to the same ground level to which the instrument
and all of its components are connected.
2. Pause for a second or two to allow any static charges to bleed away.
3. Open the casing of the instrument and begin work. Up to this point, the closed
metal casing of your instrument has isolated the components and assemblies inside
from any conducted or induced static charges.
4. If you must remove a component from the instrument, do not lay it down on a non-
ESD preventative surface where static charges may lie in wait.
5. Only disconnect your wrist strap after you have finished work and closed the case of
the instrument.
10.4.2.2. Working at an Anti-ESD Work Bench.
When working on an instrument of an electronic assembly while it is resting on a anti-
ESD work bench
1. Plug you anti-ESD wrist strap into the grounded receptacle of the work station
before touching any items on the work station and while standing at least a foot or
so away. This will allow any charges you are carrying to bleed away through the
ground connection of the workstation and prevent discharges due to field effects
and induction from occurring.
2. Pause for a second or two to allow any static charges to bleed away.
3. Only open any anti-ESD storage bins or bags containing sensitive devices or
assemblies after you have plugged your wrist strap into the workstation.
Lay the bag or bin on the workbench surface.
Before opening the container, wait several seconds for any static charges on
the outside surface of the container to be bled away by the workstation’s
grounded protective mat.
4. Do not pick up tools that may be carrying static charges while also touching or
holding an ESD Sensitive Device.
Only lay tools or ESD-sensitive devices and assemblies on the conductive
surface of your workstation. Never lay them down on any non-ESD
preventative surface.
5. Place any static sensitive devices or assemblies in anti-static storage bags or bins
and close the bag or bin before unplugging your wrist strap.
6. Disconnecting your wrist strap is always the last action taken before leaving the
workbench.
07223C DCN6572