DIGITAL
MULTIMETER
OPERATION
MANUAL
Metravi 23Smkll
1
.
SUMMARIZE
The instrument is a steady performance, battery-driven digital 4 1/2
digit
digital
multimete
.
It
uses
the
LCD
with
39
.
5mm
-
high
figure
to
make
the
reading
clear
.
The
function
of
5
sec
.
Backlight
displaying
and
overload
protection
make
operation
more
converient
.
The instrument has the function of measuring DCV, ACV, DCA,ACA
resistance
,
capacitance
,
temperature
and
frequency
,
diode
,
and
contin
-
uity
performance
tset
.
It
adops
double
intergral
A
/
D
converter
as
its
core
,
it
is
an
excellent
tool
for
labs
,
factories
and
radi
-
technology
.
1
.
Do
not
input
a
over
range
value
when
measuring
.
2
.
Voltage
less
than
36V
is
a
safety
voltage
.
When
measuring
voltage
higher than DC 36V, AC 25V check the connection and insulation of
test leads to avoid electric shock.
3
.
Be
sure
to
keep
the
test
leads
off
the
testing
points
when
switching
function and range.
4
.
Select
correct
function
and
range
to
avoid
fault
operation
,
you
may
still be careful to ensure the safety even the meter has all range
protection function.
5
.
Please
do
not
measuring
before
battery
isn
'
t
installed
and
back
cap
is not firm.
6
.
Please
do
not
input
voltage
when
measuring
resistance
.
7
.
Please
move
the
test
leads
away
from
test
points
and
turn
off
the
power before replacing batter fuse.
8
.
Introduction
for
safety
symbol
This instrument is designed according to IEC1010 standard(safety
standard
issued
by
IEC
),
Please
read
the
manual
before
operation
.
2
.
SAFETYNOTE
exists
high
voltage
GND
dual
insulation
must
refer
to
manual
low
battery
1
3
.
CHARACTERISTIC
3
-
1
.
General
1
.
Displaying
:
LCD
dispaying
.
2
.
Max
,
indication
:
1999
(
4
1
/
2
)
digits
,
auto
polarity
indication
.
3
.
Measuring
method
:
double
integral
A
/
D
conversion
.
4
.
Sampling
rate
:
approx
3
times
/
sec
.
5
.
Over
-
range
display
:
1
displays
in
the
highest
digit
.
6
.
Low
battery
display
:
.
“ ”
7
.
Working
environment
:(
0
～
40
)
℃
,
relative
humidity
<
80
%.
8
.
Power
supply
:
one
9V
battery
(
NEDA
1604
/
6F22
or
equivalent
).
9
.
Dimension
:
190x94
.
5x39
.
5mm
(
length/width
/
h
eight
).
10
.
Weight
:
approx
.
400g
(
including
9V
battery
).
11
.
Accessories
:
test
leads
,
user
manual
,
temperature
probe
,
holster
,
gift box, and 9V battery.
3
-
2
.
Technical
characeridtic
1
.
Accuracy
:
±
a
%
(
x
rdg
+
dgt
)
environment
temperature
at
(
23
±
5
)
℃,
relative
humidity
<
75
%,
one
year
guarantee
since
production
date
.
2.Performance:
Measuring DCV, ACV, DCV, ACA, resistance
Ω
, capactiance C,
frequency
f
,
temperature
T
,
diode
/
continuity
performance
testing
,
with
auto
power
off
,
backlight
and
data
hold
function
.
3. Technical Parameter
A
.
DC
Volt
(
DCV
)
200mV
2V
200V
20V
1000V
±
(0.2%rdg+5dgt)
10uV
100uV
10mV
100mV
Range
Resolution
Accuracy
Overload
protection
1mV
±
(0.1%rdg+5dgt)
Input
resistance
:
All
range
is
10M
Ω
.
Overload
protection
:
250V
DC
or
AC
effective
value
for
range
200mV
1000V DC or 750V AC effective value.
B
.
ACV
1000V
DC
/
750V
AC
RMS
±
(0.8%rdg+25dgt)
±
(1.0%rdg+25dgt)
2V
20V
200V
750V
100uV
1mV
10mV
100mV
Range
Resolution
Accuracy
Overload
protection
1000V
DC
/
750V
AC
RMS
Input
impedance
:
All
range
is
10M
Ω
.
Overload
protection
:
1000V
DC
or
750V
AC
effective
value
.
Frequency
response
: (
40
～
400
)
Hz
range
under
200V
;
(40
～
200
)
Hz
for
range
750V
.
Displaying
:
Sine
wave
rms
(
Average
value
response
).
C
.
DCA
±
(0.5%rdg+4dgt)
±
(0.8%rdg+6dgt)
±
(2.0%rdg+15dgt)
0
.
2A
/
250V
MAX
15A
MAX
200uA
1mA
2mA
20mA
200mA
20A
0
.
01uA
0
.
1uA
1uA
10uA
Overload
protection
Accuracy
Resolution
Range
Max
measurement
voltage
drop
:
200mV
Max
input
current
:
20A
(
within
10
seconds
)
Overload
protection
:
0
.
2A
/
250V
resettable
fuse
,
20A
measuring
range 15A/250V time-lag fuse.
D
.
ACA
20mA
200mA
20A
10uA
1mA
±
(1.5%rdg+25dgt)
±
(2.5%rdg+35dgt)
0
.
2A
/
250V
MAX
15A
MAX
Accuracy
Resolution
Range
1uA
Max
measurement
voltage
drop
:
200mV
Max
input
current
:
20A
(
within
10
seconds
)
Overload
protection
:
0
.
2A
/
250V
resettable
fuse
,
20A
measuring
range 15A/250V time-lag fuse.
Frequency
response
: (
40
～
200
)
Hz
.
Display
:
Sine
wave
RMS
(
Average
value
response
).
E
.
Resistance
(
Ω
)
(
0
.
4
%
rdg
+
10dtg
)
(
0
.
4
%
rdg
+
5dtg
)
[
5
.
0
%(
Reading
-
1000
)+
10
]
250V
DC
/
AC
effective
value
200
Ω
2K
Ω
20K
Ω
200K
Ω
2M
Ω
200M
Ω
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
10K
Ω
Range
Resolution
Accuracy
Overload
protection
Open
circuit
:
less
than
3V
Overload
protection
:
250V
DC
or
AC
effective
value
.
a
.
At
range
200
Ω
, short-circuit the test leads to measure the wire
resistance, then subtracts it from the real measurement.
b. At range200M
Ω
, when the test leads short circuit, LCD display
1.0M
Ω
.It is normal and doesn’t affect the accuracy. Please
deduct the value from the real measurement.
F
.
Capacitance
(
F
)
±
(3.5%rdg+10dgt)
±
(3.8%rdg+20dgt)
36V
DC
/
AC
effective
value
20nF
2uF
200uF
1pF
100pF
10nF
Range
Resolution
Accuracy
Overload
protection
Testing
frequency
:
400Hz
Overload
protection
:
36V
DC
or
AC
effective
value
.
2
4
3
Overload
protection
