VOLTCRAFT VC-56 Mode D'emploi page 18

Thanks to the input impedance of approx.
1MΩ, it is possible to perform voltage tests
with high input impedances without time
restrictions.
The VC-56 also indicates a rotating direction
(L or R) with measurements on single-phase
mains (L1 against N). This is not a device
malfunction.
Voltage measurement with low
internal impedance
This function is particularly useful for testing installa-
tions. Due to the lowered internal impedance, capacitive
voltage is suppressed. The reading shows the actual
voltage applied. Similarly, measuring phase (L1) on
earth wire (PE) may trigger fault-current circuit breakers
(FI or RCI).
This measuring procedure can be used for measure-
ments above 12V.
Always hold the voltage tester by the handles designed
for this purpose (3 and 6). Never touch the device
beyond the handle ends.
Hold the two test tips (1 and 11) onto the measuring
points to be tested.
Press the two push-buttons (2) and (8) simultaneously.
The applied voltage is shown on the LCD display (A).
The Low-Imp LED (C) signals low impedance measure-
ment.
The maximum permitted duty cycle in low
impedance operating mode is 5 seconds for
voltages up to 250V and 3 seconds for volta-
ges up to 690V.
When this time has lapsed, wait for 10
minutes.
Rotating field direction display
The VC-56 can show the direction of the rotating field
with three-phase systems.
Hold the voltage tester by the handles (3) and (6) provi-
ded. Never touch the device beyond the handle ends.
Hold the two test tips onto the measuring points to be
tested.
Test tip (1) corresponds to L1, and test tip (11) corre-
sponds to L2.
The applied voltage and the rotating field direction is
shown on the LCD display
The rotating field symbols (D) show the corresponding
rotating field direction (L = anticlockwise / R = clockwise).
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