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CAL TEST ELECTRONICS
CT3688A Active Differential Probe Kit, User Guide
© Cal Test Electronics. All rights reserved.
Cal Test Electronics products are covered by US and foreign patents, issued
and pending. Information on this publication supersedes all earlier versions.
Specifications are subject to change without notice.
Made in Taiwan
SYMBOLS AND TERMS
The following symbols may appear on the product or in the documentation.
Caution Symbol (ISO 7000-0434)
– Statements or instructions
that must be consulted in order to find out the nature of the
potential hazard and any actions which must be taken.
Caution, possibility of electric shock Symbol (IEC 604027-
6042)
- To identify equipment that has the risk of electric shock.
A statement calling attention to an operating procedure,
practice, or condition, which if not followed correctly, could result
in damage to or destruction of parts or the entire product.
A statement calling attention to an operating procedure,
practice, or condition, which if not followed correctly, could result
in injury or death to personnel.
WARNING
WARNING
CAUTION
DEFINITIONS
POLLUTION (P)
– addition of foreign matter solid, liquid or gaseous (ionized
gases), that may product a reduction of dielectric strength or surface
resistivity.
• Degree 2 (P2) – only non-conductive pollution occurs except that
occasionally a temporary conductivity caused by condensation is
expected.
MEASUREMENT CATEGORY (CAT)
– classification of testing and measuring
circuit according to the type of mains circuits to which they are intended to
be connected.
• MEASUREMENT CATEGORY other than II, III, or IV: - measuring
circuits that are not directly connected to the mains supplies.
