DVM821
V. 03
–
20/03/2020
6
©Velleman nv
possibility of executing continuity tests and of testing diodes and transistors.
The back light is optional.
Refer to the illustration on page
2
of this manual:
1.
Display (max. 1999 counts, max. 3 ½ digits, dimensions: 47 x 15 mm)
With low-battery indication
2.
Rotary switch for manual range selection
This switch is used to select functions and desired ranges as well as to
turn the meter on/off.
3.
Input jack
Overvoltage/Installation Category
7.
Overvoltage/Installation Category
The applicable categories according EN 61010-1 are:
CAT
II
A CAT II-rated meter is suitable for measurements in CAT I-
environments and mono-phase appliances that are connected to the
mains by means of a plug and circuits in a normal domestic
environment, provided that the circuit is at least 10m apart from a
CAT III- or 20 m apart from a CAT IV-environment. E.g. household
appliances, portable tools…
CAT
III
A CAT III-rated meter is suitable for measurements in CAT I- and
CAT II-environments, as well as for measurements on (fixed) mono-
or poly-phased appliances which are at least 10 m apart from of a
CAT IV-environment, and for measurements in or on distribution
level equipment (fuse boxes, lighting circuits, electric ovens).
8.
Pollution Degree
IEC 61010-1 specifies different types of pollution environments, for which
different protective measures are necessary to ensure safety. Harsher
environments require more protection, and the protection against the
pollution which is to be found in a certain environment depends mainly on
the insulation and the enclosure properties. The pollution degree rating of
the DVM indicates in which environment the device may be used.
Pollution
degree 2
Only nonconductive pollution occurs. Occasionally,
temporary conductivity caused by condensation is to be
expected.(home and office environments fall under this
category)
•
This device is only suitable for measurements in Pollution
degree class 2 environments.
•
operating environment:
o
temperature: 0 °C to 40 °C (32 to 104 °F)
