6
WARNING:
AutoV
mode input impedance increases abruptly from initial 2.1
kΩ to a few hundred kΩ’s
on high voltage hard signals
. “
LoZ
” displays on the LCD to remind the u
sers 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 / 2.1
kΩ)
, decreasing abruptly to approx. 2.4mA (1000V x 1.414
/ 580
kΩ) 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.
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.
Note:
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.
Summary of Contents for BM236R
Page 1: ...USER S MANUAL BM236R BM237R BM239R ...
Page 9: ...8 ...