INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 79)

EN- 79 Sensistor ISH2000 Technical Reference Manual (TRM)
E 100
E 100 Maintenance operations introduction
Electrostatic discharge
(ESD) protected equipment
To a greater or lesser extent aIl contact between objects, separation of one item
from another, or sliding of one thing on another, causes a disturbance of elec-
trical charge. When charge disturbances take place faster than charge redistri-
bution, static charge accumulates.
Amongst the greatest generators of static electricity are people. It can be readily
shown how in ordinary ambient conditions a person's electrical charge, mea-
sured in Volt, is constantly changing. It can move up or down at every step, as
they sit or rise, when they touch things, or as another person passes nearby.
Consequently if people handle electrostatic discharge sensitive devices (ESD)
without appropriate precautions, there is a real risk they will unwittingly
damage them.
Electrostatic discharge (ESD) has been recognized as a potential hazard for
semi-conductors and integrated circuits.
To protect devices from the unwanted effects of ESD, two key measures must
be taken and applied at aIl times:
1. devices must be handled exclusively in an ESD Protected Area (EPA). ln
essence, an EPA is a defined space within which aIl surfaces, objects, people
and devices are kept at the same potential.
2. devices must be transported from one EPA to another only in ESD shielding
packages.
The issue is to save defects on customer sites for the integrated electronic
boards in leak detector, drytels, controllers and accessories.
The ESD reduce the useful life of the electronic boards. There is no immediate
consequences during the assembly of the electronic devices but there is a pre-
mature aging of components.
All the Service Centers must be equipped to protect the INFICON products
against the ESD during repair process.
On Customers site, during exchange or maintenance of electronic card, the
engineer must wear the ESD coat and use disposable wristband.
To achieve this goal, we invite you to order the “ESD KIT” and install it in your
Service Center as soon as possible.
Safety instructions
See B 100 “B 100 Safety instructions” on page 29
Icons used
Figure E-1: Icons used
x
x mm Allen key
Philips head screwdriver
Screwdriver for slotted
TORX screwdriver
Voltmeter
Ohmmeter
head screws