SIKA, Dr. Siebert & Kühn GmbH & Co. KG, Struthweg 7-9, 34260 Kaufungen, Germany
7/40
Tel: +49-5605-803-0, Fax: +49-5605-803-54, email: [email protected], web: www.SIKA.net
A.3.6
Making measurements
The measuring leads and wires must be in good condition and must be replaced if their insulation appears faulty
(insulating material cut, burned, etc...).
Never exceed the protection value limits indicated in the specifications.
Before changing function, disconnect the measuring wires from the external circuit. When voltage measurements
are being made, even weak ones, keep in mind that the circuits may feature a dangerous voltage for the operator
compared to the ground.
Do not make any measurements when the device is linked up to another device using the USB link or when the
batteries are being charged.
A.3.7
Defects and abnormal stresses
Every time you believe the protection may have been compromised, switch off the device and prevent it from being
switched back on unexpectedly.
The protection may be impaired in the following cases, for example:
The device is visibly worn.
The device is no longer able to make precise measurements.
The device was stored in unfavourable conditions.
The device has undergone severe stresses during transport.
A.3.8
Definitions
A.3.8.1
Definition of the category and degree of pollution
CAT II 60V:
This notion of categories determines the maximum voltage which can be applied to the measuring inputs (it is also
referred to as the overvoltage category). For the UC TC, the ceiling overvoltage is (DC or AC)
POL 2:
The notion of pollution determines the clearance between circuits. Degree 2 authorises temporary conductivity
caused by condensation.
A.3.8.2
Table of symbols used
Symbol
Name
Attention: see the accompanying documents
Earth
Compliant with the European Union directives
60V
CAT II Pol 2
Category II, Pollution 2.
Maximum common mode voltage compared with the
ground=60V
