TM-86
EN - 6
active.
1.3. AFTER USE
After using the instrument turn it off.
If you expect not to use the instrument for a long
period remove the battery to avoid leakages of
battery liquids which may damage its inner
components.
1.4. MEASURING (OVERVOLTAGE) CATEGORIES
DEFINITIONS
EN 61010-1: Safety requirements for electrical
equipment for measurement, control and laboratory
use, Part 1: General requirements, gives a definition
of measuring category, usually called over voltage
category. Paragraph 6.7.4: Measuring circuits:
(OMISSIS)
Circuits are divided into the following measurement
categories:
Measurement category IV
is for measurements
performed at the source of the low-voltage
installation.
Examples are electricity meters and
measurements on primary over current
protection devices and ripple control units.