Hitachi V-355 Operation Manual page 50

o
This instrument should be adjusted at an ambient temperature of +20 ° C
for best overall accuracy .
Allow at least 1 5 minutes warmup before proceeding.
o
Polyvinyl chloride (PVC) film is attached on the enclosure and the front
panel of the oscilloscope to protect the me tal surface . If the PVC film is
damaged by scratches, remove it.
o
To clean the enclosure or the front panel, use neutral detergent. Refrain
from using thinner, benzine , alcohol or other chemicals.
o
For safety operation , be sure to connect the ground lead of the GND
( ground) terminal to earth ground, if a two-wire AC power system is used.
Failure to complete the ground system may allow the chassis and cabinet
of this instrument to be elevated ab ove ground potential and pose a shock
hazard .
NOTE