6
*As Hazardous-Alert:
When making resistance measurements in AutoCheck
TM
mode, an
unexpected display of voltage readings alerts you that the object under test is being
energized.
*Ghost-voltage Buster:
Ghost-voltages are unwanted stray signals coupled from adjacent
hard signals, which confuse common multimeter voltage measurements. Our AutoCheck
TM
mode provides low (ramp-up) input impedance (approx. 3kΩ 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
ground) in electrical installation applications.
WARNING:
AutoCheck
TM
mode input impedance increases abruptly from initial 3kΩ 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 471mA (1000V x 1.414 / 3kΩ), decreasing abruptly to approx. 3.1mA (1000V x
1.414 / 460kΩ) within a fraction of a second.
Do not use AutoCheck
TM
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.
dBm
+Hz
(829 only), Hz
+ACV
, ACV
+Hz
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.
Note: Hz Input sensitivity varies automatically with voltage (current function alike) range
selected. 1V range has the highest and the 1000V range has the lowest. Auto-ranging
