Safety Instructions
VT300 User’s Guide, Rev. A4 viii Doc # UM-VT300-EN
Safety Instructions
The following instructions serve as a general guide for the safe operation of the
VT300. This User’s Manual is intended for users of the indicator, who are prohibited
from installing, calibrating, setting up or servicing the product. Only qualified and
authorized service personnel should install the product, set it up, calibrate it, or carry
out adjustment, maintenance or repairs.
Safety Symbols
This symbol indicates potential safety hazards regarding product operation or
maintenance to operator or service personnel.
General Safety Practices
Do not touch or tamper with the power supply when the power cord is connected.
Line voltages may be present even when the product is powered off or a fuse is
blown.
Before working on equipment connected to power lines or to other devices, remove
jewelry or any other metallic object that may come into contact with energized parts.
The product is intended to be grounded during normal use. Grounding is provided by
connecting the mains plug to a wall socket with a protective earth terminal. The earth
lug provided on the product should be connected to the protective earth at all times,
by a wire with a diameter of 18 AWG or wider.
Always make the ground connection first and disconnect it last. Do not connect data
cables to ungrounded equipment. Make sure that all other cables are disconnected
before disconnecting the ground.
Special Safety Warnings
Welding on or in the vicinity of the equipment is strictly prohibited.
Use reliable lightening conductors to prevent static loads caused by
thunderstorms.
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