Installing The Optical Interface; Safety Precautions For Preventing Electrical Accidents; Measures For Preventing Electrostatic Damage - Wavetek ANT-20 Operating Manual

ANT-20SE
3

Installing the optical interface

3.1

Safety precautions for preventing electrical accidents

Opening covers or removing parts with a tool can expose live parts. Terminal points may also
be live.
Disconnect the instrument from all voltage sources before opening it. If calibration, maintenance
or repair of the open instrument must be carried out with power connected, then this should be
performed by a trained technician who is familiar with the risks involved.
Capacitors in the instrument may retain charge even when the instrument has been
disconnected from all voltage sources. Heed the circuit diagrams!
3.2

Measures for preventing electrostatic damage

Electrostatic charges and fields can damage or even destroy semiconductors.
It is thus necessary to protect all semiconductor components used in this instrument against
electrostatic charges and fields.
When the instrument is closed, this is no problem. When the instrument is open, electrostatically
susceptible boards and subassemblies are designated with the DIN 40 021 warning symbol.
Special measures must be taken to protect these boards and subassemblies.
Fig. M-3
Special measures
Grounded person
Wristband
Grounding cable
Maintenance
Warning symbol to DIN 40 021
Only "grounded persons" working at an electrostatically protected
workstation may reach into the instrument.
The technician must be grounded via the wristband of the
electrostatically protected workstation.
The grounding cable is connected to ground (earth) potential.
The following can be considered to be at ground potential:
• the instrument ground jack
• the protective earth connection
• another device at ground potential
Optical Interfaces
M-3