DVM898
V. 01 – 06/04/2017
6
©Velleman nv
Always be careful when working with voltages above 60 VDC or 30 VAC
rms. Keep your fingers behind the probe barriers at all times during
measurement.
Never perform resistance, diode or continuity measurements on live
circuits. Make sure all capacitors in the circuit are depleted.
6.
General Description
Refer to the illustration on page
2
of this manual:
1.
Display
3 ½ digits, 7 segments, LCD: 60 x 28 mm
2.
Function buttons
3.
Selection button
4.
“15A” jack
Insert the red test lead in this connector in order to measure a max.
current of 15 A.
5.
“µAmA” jack
Insert the red (positive) test lead in this connector to measure current
(except 10 A).
6.
“COM” jack
Insert the black (negative) test lead.
7.
“V
Hz” jack
Insert the red (positive) test lead in this connector to measure voltage,
resistance and frequency.
7.
Overvoltage/Installation Category
DMMs are categorized depending on the risk and severity of transient
overvoltage that might occur at the point of test. Transients are short-lived
bursts of energy induced in a system, e.g. caused by lightning strike on a
power line.
The existing categories according EN 61010-1 are:
CAT I
A CAT I-rated meter is suitable for measurements on protected
electronic circuits that are not directly connected to mains power, e.g.
electronics circuits, control signals…
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 10 m apart from a
CAT III- or 20 m apart from a CAT IV-environment. E.g. household
appliances, portable tools…
