PROBE BODY w/2 mm TIP & SAFETY CAP
3900B SERIES
CT3974B
USER GUIDE
CAL TEST ELECTRONICS
CT3974B Probe Body with 2 mm Tip & Safety Cap, 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. Specications 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 nd out the nature of the potential
hazard and any actions which must be taken.
Ce symbole de mise en garde (ISO 7000-0434) – indique qu’il
faut consulter les instructions an de déterminer la nature du danger
potentiel et déterminer toutes les mesures adaptées à prendre.
CAUTION
MISE EN GARDE
WARNING
AVERTISSEMENT
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.
Une mise en garde attire l’attention sur une procédure, une pratique
ou une condition d’utilisation qui, si elles ne sont pas suivies
correctement, pourraient endommager ou détruire une partie du
produit ou le produit entier.
A statement calling attention to an operation procedure, practice, or
condition, which if not followed correctly, could result in injury or death
to personnel.
Un avertissement attire l’attention sur une procédure, pratique
ou condition de fonctionnement qui, si elles ne sont pas suivies
correctement, pourraient entraîner des blessures, voire la mort de
l’utilisateur.
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
MEASUREMENT CATEGORY (CAT) – classifcation of testing and measuring circuit
expected.
according to the type of mains circuits to which they are intended to be connected.
• CAT II – measuring circuits connected to utilization points of the lowvoltage mains installation.
• CAT III – measuring circuits connected to distribution part of the building’s
low-voltage mains installation.
• CAT IV – measuring circuits connected at the source of the building’s lowvoltage mains installation.
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