DVM894
V. 01 – 21/01/2015
7
©Velleman nv
5.
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 DMM indicates in which environment
the device may be used.
Pollution
degree 1
No pollution or only dry, nonconductive pollution occurs. The pollution
has no influence (only to be found in hermetically sealed enclosures).
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).
Pollution
degree 3
Conductive pollution occurs, or dry nonconductive pollution occurs
that becomes conductive due to condensation that is to be expected
(industrial environments and environments exposed to outside air -
but not in contact with precipitation).
Pollution
degree 4
The pollution generates persistent conductivity caused by conductive
dust or by rain or snow (exposed outdoor environments and
environments where high humidity levels or high concentrations of
fine particles occur).
Warning:
This device was designed in accordance with EN 61010-1
pollution
degree 2
. This implies that certain restrictions in use apply that are related to
pollution which can occur within the environment of use. Refer to the table above.
THIS DEVICE IS ONLY SUITABLE FOR MEASUREMENTS IN POLLUTION
DEGREE CLASS 2 ENVIRONMENTS.
6.
Overview
Refer to the illustrations on page
2
of this manual.
1
LCD display: 3 ½ digits, 2000 counts
2
power button
3
HOLD: to hold the last reading
4
rotary switch: to select functions and the desired ranges
5
input sockets
Display
low battery
Warning: To avoid false readings, which can possibly
lead to electric shocks or personal injury, replace the
battery as soon as the battery indicator appears.
negative input polarity indication
HV
high-voltage symbol (600 VAC or 600 VDC)
HOLD
data-hold mode
