Velleman VTTEST22 Bedienungsanleitung Seite 11

VTTEST22
'voltage present' indicator appears at a measurement point that is
considered disconnected from the system, it is strongly recommended that
additional measures be taken (e.g., reduced impedance voltage test, visual
inspection of the disconnection point in the power grid, etc.) to detect and
establish the 'no operating voltage present' status of the system component
under test, such that the voltage indicated by the voltage meter is a fault
voltage. If the 'voltage present' indicator does not appear, it is strongly
recommended to insert the grounding device before starting work.
The following measurement functions can be performed:
10.1 Two-pole voltage test
Always hold the voltage meter by the handles designed for it. Never
protrude beyond the tangible barrier of the handle (4). For voltage tests in
the CAT III measurement category, the two insulation caps must be placed
over the test probes. This limits the free contact area of the test tip to a
maximum of 4 mm. This prevents unintentional short circuits in restricted
test conditions (e.g. in junction boxes). Route the two test probes to the
test points to be tested. The voltage range is shown in the incremental LED
display. The light indicators (+) and (-) show the type of voltage and the
corresponding polarity. If both indicators (+) and (-) are lit simultaneously,
alternating current (~) is present. Polarity is indicated only by the two LEDs.
When testing built-in sockets, the two insulating covers of the test probes.
The longer test probes now allow measurement on a wall outlet.
Warning:
Be sure to keep your hand within reach of the test probe and do not cover
the display.
10.2 Phase test
The voltage meter allows the determination of the outer conductor "L1".
This can be useful, for example, for tests on sockets. Here the outer
conductor can be determined both quickly and easily. Hold the voltage
meter by the handles designed for this purpose. Never touch the device
outside the handles. To perform the phase test, make sure the installation is
correctly connected.
Make contact with the test probe L2- (1) contact with the ground pin (PE) of
the socket and test probe L1+ (2) contact with the outer conductor. If the
voltage indicator lights up, you have made contact with the outer conductor.
V. 01 – 09/10/2023 11 ©Velleman Group nv