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16
AutoV
mode input impedance increases abruptly from initial 2.1kΩ
to a few hundred kΩ's on high voltage hard signals. “LoZ” displays
on the LCD to remind the users of being in such low impedance
mode. Peak initial load current, while probing 1000VAC for example,
can be up to 673mA (1000V x 1.414 / 2.1kΩ), decreasing abruptly to
approx. 2.4mA (1000V x 1.414 / 580kΩ) within a fraction of a second.
Do not use AutoV mode on circuits that could be damaged by such
low input impedance. Instead, use rotary selector or high input
impedance voltage modes to minimize loading for such circuits.
WARNING :
ACV, DCV & VFD-ACV functions
Press the SELECT button momentarily to select the subject
functions in sequence. Last selection will be saved as power up
default for repeat measurement convenience.
VFD-ACV and the associated Hz are equipped with digital low-pass
filter (DSP), and are capable of handling VFD (Variable Frequency
Drives) signals for fundamental V & Hz readings. It also improves
ACV and Hz reading stability when being used in most noisy
electrical environments.
Note:
V
~
V
15
●
With no input, the meter displays “- - - -” when it is ready.
●
When a signal above the voltage threshold of 1V DC or
AC up to the rated 1000V is present, the meter displays the
voltage value in appropriate DC or AC, whichever larger in
peak magnitude.
*Ghost-voltage Buster:
Ghost-voltages are unwanted stray signals
coupled from adjacent hard signals, which confuse common
multimeter voltage measurements. The
AutoV
mode provides low
(ramp-up) input impedance (approx. 2.1kΩ at low voltage) to drain
ghost voltages leaving mainly hard signal values on meter
readings. It is an invaluable feature for precise indication of hard
signals, such as distinguishing between hot and open wires (to
g r o u n d ) i n e l e c t r i c a l i n s t a l l a t i o n a p p l i c a t i o n s .
*Only
HOLD, EF & Backlight
push-button features are available
in AutoV mode.
Note :
