Phase Test; Continuity Test; Rotating Field Test; Resistance Measurement - Weidmuller VTMaster Operating Instructions Manual

5.2 Phase test

This function is only guaranteed if the earthing
conditions are optimal.
The single-pole phase test is not suitable for de-
tecting the absence of voltage.
► Hold the device firmly in your hand.
► Connect test probe L2 to the test object.
If a voltage > 100 V AC is detected, a warning sig-
nal will sound.
The phase is displayed visually:
VT Master, VT Combi Pro
Phase test LED lights up
VT Digi Pro
LED under the display lights up

5.3 Continuity test

Ensure the test object is free of voltage.
► Connect both test probes to the test object.
If a voltage > 10 V (VT Master) or > 6 V
(VT Combi Pro, VT Digi Pro) is detected, the de-
vice automatically switches to the voltage test.
VT Master
► The continuity check is performed automati-
cally.
If continuity is detected, a warning signal will
sound and the continuity LED will light up.
VT Combi Pro
► The continuity test is carried out as long as
you hold down the test key.
If continuity is detected, a warning signal will
sound and the continuity LED will light up.
VT Digi Pro
► The continuity test is carried out as long as
you hold down the test key.
or
► Press the function key to activate or deacti-
vate continuity check mode.
If continuity is detected, a warning signal will
sound and the continuity symbol will light up.

5.4 Rotating field test

VT Combi Pro, VT Digi Pro
This function is only guaranteed if a properly
grounded three-phase system is installed. Meas-
uring principle: The voltage tester detects the
sequence of the rising phases against earth.
► Hold the device firmly in your hand.
► Connect both test probes to the test object.
The phase-to-phase voltage is indicated:
Clockwise rotating field: R-LED lights up
Anti-clockwise rotating field: L-LED lights up

5.5 Resistance measurement

Only VT Digi Pro
Make sure that the test object is free from
voltage.
► To activate the function, briefly press the
function key twice.
The symbol for resistance measurement (Ω) is
displayed.
► Connect both test probes to the test object.
If a voltage > 15 V is detected, the device auto-
matically switches to the voltage test.
If a resistance < 30 Ω is detected, a warning sig-
nal will sound. This is how low volume resistance
is indicated.
23