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Model 9110T NOx Analyzer Primer on ESD
Teledyne Analytical Instruments 371
Never use ordinary plastic adhesive tape near an ESD sensitive device or to close an anti-
ESD bag. The act of pulling a piece of standard plastic adhesive tape, such as Scotch
®
tape, from
its roll will generate a static charge of several thousand or even tens of thousands of volts on the
tape itself and an associated field effect that can discharge through or be induced upon items up to
a foot away.
14.5. BASIC ANTI-ESD PROCEDURES FOR ANALYZER REPAIR
AND MAINTENANCE
14.5.1. WORKING AT THE INSTRUMENT RACK
When working on the analyzer while it is in the instrument rack and plugged into a properly grounded
power supply:
1. Attach your anti-ESD wrist strap to ground before doing anything else.
Use a wrist strap terminated with an alligator clip and attach it to a 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 analyzer and begin work. Up to this point, the closed metal casing of
your analyzer 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
analyzer.
14.5.2. WORKING AT AN ANTI-ESD WORK BENCH
When working on an instrument of an electronic assembly while it is resting on a anti-ESD workbench:
1. Plug your 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.