Download Leakage current considerations in automobile battery voltage

Components, Semiconductors, FPD, PCB
R&D, Testing
/ Automotive,
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/ QA, Inspection
Components,
Semiconductors,
FPD, PCB
R&D, Testing/QA,
Inspection
/Automotive, Transportation
Leakage current considerations in automobile battery voltage measurements
Leakage current considerations in automobile battery
voltage
measurements
The Memory HiCorder MR8741 (DMM Logging Station) can be used for automobile battery
The Memory
HiCorder
MR8741
(DMM
Logging
Station) can be used for automobile
voltage
measurements
needed
to determine
leakage
current.
The
MR8741
exhibits
unusually highneeded
input impedance
for a voltmeter,
making it significantly
battery
voltage
measurements
to determine
leakage current.
more
sensitive
to
abrupt
minute
current
variations
than
common
logger
voltmetersmaking
having it
The MR8741 exhibits unusually high input impedance for a voltmeter,
input impedance around 1 MΩ.
significantly more sensitive to abrupt minute current variations than common logger
voltmeters having input impedance around 1 MΩ.
■ Highlights
When a voltmeter
low
input
impedance
is connected
to an to
automobile
battery,battery, enough
When
voltmeterwith
withrelatively
relatively
low
input
impedance
is connected
an automobile
enough
current
flows
through
the
voltmeter
to
overwhelm
the
capability
to
measure
leakage
current flows through the voltmeter to overwhelm the capability to measure leakage current.
current.
For adequate
sensitivity
to thecurrents
weak currents
be measured
in such
cases,
only
a
For
adequate
sensitivity
to the weak
to be to
measured
in such
cases,
only
a voltmeter
with
voltmeter
with
higher
input
impedance
can
make
measurements
in
a
state
close
to
actual
higher input impedance can make measurements in a state close to actual specifications.
specifications.
Ba
Measurement renge
100 mV (5 mV/div)
1000 mV (50 mV/div)
10 V (500 mV/div)
100 V (5 V/div)
1000 V (50 V/div)
t te
ry
Effective input range
-120.0000 mV to 120.0000 mV
-1200.000 mV to 1200.000 mV
-12.00000 V to 12.00000 V
-120.0000 V to 120.0000 V
-500.000 V to 500.000 V
Input resistance
More than 100 MΩ
10 MΩ± 5 %
MEMORY
HiCORDER
(DMM
LOGGING
STATION)
: MR8741
MEMORY
HiCORDER
(DMM
LOGGING
STATION)
: MR8741
DVM
UNIT
:
MR8990
x
8
(16
channels)
DIGITAL VOLTMETER UNIT : MR8990 x 8 (16 channels)
TEST LEAD : L2200
TEST LEAD : L2200
(Although not depicted in the photos, test leads are required for each measurement channel.)
(Although not depicted in the photos, test leads are required for each measurement channel.)
The MR8741 can simultaneously measure 16 voltage channels, all independently isolated. Measured data
The
MR8741
can simultaneously
16 voltage
channels,
all independently
isolated.
Measured
data
can
also
be recorded
and displayedmeasure
as waveforms.
Sister
model MR8740
measures
up to 54
voltage channels.
can also be recorded and displayed as waveforms. Sister model MR8740 measures up to 54 voltage channels.
Products used
MEMORY HiCORDER MR8741
DVM UNIT
(2 channels) MR8990
Products
used
MEMORY HiCORDER MR8741
DIGITAL VOLTMETER UNIT MR8990
Information valid as of November 2012.
TEST
LEAD L2200 are subject to change and revision without notice.
Specifications
Information valid as of March 2016. Specifications are subject to change and revision without notice.
K0054-E00
November 2012
K0054-E00
March 2016