Chapter 1: Safety
iv APx555 Audio Analyzer: Safety Information
rated for a maximum input of 160 Vpk to ground, and a sig-
nal input of 115 Vrms, balanced or unbalanced. These ter-
minals are intended to be used for the measurement of audio
signals only.
Do NOT substitute parts or make any modifications with-
out the written approval of Audio Precision. Doing so may
create safety hazards. Using this product in a manner not
specified by Audio Precision can result in a safety hazard.
This product is for indoor use—Installation Category II,
Measurement Category I, pollution degree 2.
Safety Symbols
The following symbols may be marked on the panels or
covers of equipment or modules, and are used in this man-
ual:
WARNING!—This symbol alerts you to a potentially haz-
ardous condition, such as the presence of dangerous volt-
age that could pose a risk of electrical shock. Refer to the
accompanying Warning Label or Tag, and exercise extreme
caution.
ATTENTION!—This symbol alerts you to important oper-
ating considerations or a potential operating condition that
could damage equipment. If you see this marked on equip-
ment, refer to the Operator’s Manual or User’s Manual for
precautionary instructions.
FUNCTIONAL EARTH TERMINAL—A terminal marked
with this symbol is electrically connected to a reference
point of a measuring circuit or output and is intended to be
earthed for any functional purpose other than safety.
PROTECTIVE EARTH TERMINAL—A terminal marked
with this symbol is bonded to conductive parts of the instru-
ment and is intended to be connected to an external protec-
tive earthing system.
Disclaimer
Audio Precision cautions against using their products in a
manner not specified by the manufacturer. To do otherwise
may void any warranties, damage equipment, or pose a
safety risk to personnel.
