1. System installation requirements
1-15
TI 30A30A10-01EN
1.4.2
Countermeasures against static electricity
Take countermeasures against electrostatic damage when handling cards with semi-conductor
IC components, for maintenance or to change settings.
Observe the following to prevent electrostatic damage:
• When storing or carrying maintenance parts, be sure to enclose them in an antistatic bag.
(For shipment these parts are enclosed in an antistatic bag labeled with precautions against
electrostatic charge.)
• During maintenance work use a wrist strap with a ground wire via a grounding resistance of
1 MΩ. Be sure to ground the wrist strap.
• When performing maintenance work on a desk or a table, place a conductivity sheet
grounded via a grounding resistance of 1 MΩ. The maintenance person must wear a wrist
strap while performing maintenance work. Take any plastic and other materials that can
easily be charged away from the work area.
• Exercise caution so as not to touch any of the maintenance parts while the wrist strap and a
conductivity sheet are not being used.
F010404.ai
Protective grounding bar
1 MΩ
Wrist strap
Figure Example of using a wrist strap
Wrist straps and conductive sheets are available from Yokogawa.
Feb. 26, 2018-00
