Safety Instructions; Safety Symbols - Tenma 72-6802 User Manual

S
AFETY INSTRUCTIONS
This chapter contains important safety instructions
that you must follow when operating and storing
this instrument. Read the following instructions
before operating the instrument to ensure your
safety and to keep it in best condition.

Safety symbols

These safety symbols may appear in this manual or on the
instrument.
Warning: Identifies conditions or practices that
WARNING
could result in injury or loss of life.
Caution: Identifies conditions or practices that
CAUTION
could result in damage to the instrument or to
other properties.
DANGER: High Voltage
Attention: Refer to the Manual
Protective Conductor Terminal
Earth (Ground) Terminal

SAFETY INSTRUCTIONS

5
Safety guidelines
General
•
Never connect a hazardous live voltage to the
Guideline
ground side of the BNC connectors. It might
lead to fire or electric shock.
CAUTION
•
Do not place heavy objects on the instrument.
•
Avoid severe impacts or rough handlings that
lead to damaging the instruments.
• Do not discharge static electricity onto the
instruments.
•
Use only mating connectors, not bare wires, for
the terminals.
•
Do not block the cooling fan opening.
•
Do not perform measurements at power
generating sources and building installation
sites (See note below).
•
Do not disassemble the instrument unless you
are technically qualified.
•
To prevent a permanent damage to the CRT
phosphor, avoid excessively brightening the
trace or holding a light spot for an unreasonably
long time.
•
Do not operate the instrument in a place where
strong magnetic or electric field exists as it may
disturb the measurement.
•
Make sure the input voltage does not exceed the
following values.
Input Terminal
CH1, CH2 input 300Vpeak
EXT TRIG input 300Vpeak
6
72-6802 User Manual
Maximum Input Voltage