Aneng M118A User manual

Automatic Scanning Digital Multimeter
User’ Manual

—. Overview
This series multimeter is a pocket 3 5/6 bit true effective value automatic scanning digital
meter. Depending on the input voltage/current/resistance/equal signal, the instrument is capable
of automatic identification measurement. The series of instruments have the characteristics of
stable performance, high precision and clear reading. With the extra convenience of flashlight
and non-contact voltage test, it is an ideal instrument for factory, teaching and electronics
enthusiasts.
—. Security matters
Design of the series of meters in accordance with the 1EC1010 provisions (safety standards
issued by the International Electrotechnical Commission), please read the safety precautions
carefully before use the meter, the use of strict compliance with safety regulations, so as not to
Cause casualties or instrument damage.
1, When measuring the voltage, do not input the limit voltage exceeding the effective value
DC 600 V or AC 600V;
2, The voltage below 36 V is safe voltage, when measuring the voltage above 36 V, please
be sure to pay attention to safety. Because more than 36 V of voltage may cause damage to the
human body;
3, When changing function and range, the pen should leave the test point;
4, Select the correct function and range, beware of wrong operation, although the series of
instruments with full range protection function, but for the sake of safety, please pay more
attention to safety;
A sar,
5,
OF
BA
safety
symbol
states
“hazardous
voltage
exists
","
ground
“,”
double
insulation ,“" operator must refer to instruction ,"" low voltage symbol. mo

=, Characteristics
1. General characteristics
1-1. Display mode: LCD;
1-2. Maximum display :5999(3 5/6 bit automatic display);
1-3. How to measure: conversion A/D double integral fraction;
1-4.
Sampling
rate:
about
3
times
per
second;
1-5.
Excess
range
display:
display
"OL";"
1-6.
Low
voltage
display
:""
symbol
appears;
*~
1-7. Working environment :(0~40)‘C, relative humidity <80%;
1-8. Electricity: Two batteries 7(AAA 2*1.5V);
1-9. Volume size:118*68*30mm
1-10, Weight:100g without battery
2. Technical characteristics
Accuracy := (reading a%+ minimum effective digit), guaranteed accuracy environment:
temperature (23 +5) C, relative humidity <75%, calibration guarantee date one year.
2-2, performance ("A" means the table has this function)
ee ce
DC Current
a ae
ac
es
a
AZ
Resistance/Diode,
ey
A
Capacitance
NCV
Zero line/fire line test
Backlight
manual/automatic
shutdown
Ac Validity
Measurement
Flashlight lighting

3-1, DC/AC voltage measurement (DCV/ACV)
+(0.5%+3) 0.01V
Input impedance :10 M © ; Overload protection :600 V dc or 600 V ac peak.
3-2 Resistance Measurement (2)
penis,
+ (2.5%+3) 10k Q
Input
impedance
:10
M
©
;Overload
protection
:600
V
dc
or
600
V
ac
peak.
3-3
Diode/on-off
test
Display value Test conditions
Forward DC current
Diode forward about imA
pressure drop open circuit voltage V
about 3
The buzzer sounds
long and the two-point About 0.4 V open
resistance is less than circuit voltage
(S0+202.
Input impedance :10 M & ; Overioad protection :600 V dc or 600 V ac peak.
3-4 Measurement of capacitance (C)(JS33D models only)
Overload protection :600 V DC or 600 V AC peak.

3-5,
AC/pc
current
(DC/AC
A)
Maximum
measured
pressure
drop
:600
mV;
Overload
protection
:10
A
+ (2%430)
PU, Operation Key Description
N
1. Flashlight trigger button;
2. NCV measurement key, long press NCV key can measure electric field induction signal;
3. H/BL for reading hold key, long press 2 seconds to light LCD screen backlight, about 15
seconds after the backlight automatically turned off;
4. Power button, long press 2 seconds to turn on/off the power supply, boot state this key
for the function selection button, each light press switch once measurement function;
HSL GY
Fi. Operational guidance
5-1, DC/AC voltage automatic scan test (DCV/ACV)
1.Press the power key for more than 2 seconds to turn on the meter. The boot is shown
as automatic scan AUTO".
2. insert black watch pen into "COM" jack, red watch pen insert" V/ 2" jack, test watch
pen reliable contact test point.
3. when the voltage between the input port "COM" and" V/ Q " is greater than 0.5 V,
the meter will compare according to the size of the DC component and AC component, take
its larger component signal, and then automatically switch the range according to the size of
the
measured
value,
and
then
display
the
measured
value
on
the
LCD.
4. If it can not be measured in the environment of greater interference, trigger the
power
key
to
manually
select
DC
or
AC
voltage
measurement
mode
for
measurement.
Note:
1,
The
input
voltage
must
not
exceed
the
DC
600
V
or
AC
600
V,
if
there
is
a
risk
of
damage
to
the
instrument
circuit;
when
measuring
more
than
36
V
voltage
should
pay
special
attention
to
safety
to
avoid
the
danger
caused
by
electric
shock;
2. After completing all measurement operations, disconnect the meter pen from the
circuit under test.
5-2,
Resistance
measurement
1.
Press
the
power
key
for
more
than
2
seconds
to
turn
on
the
meter.
boot
auto
scan
status
“AUTO"..

2.
Insert
black
watch
pen
into
"COM"
jack,
red
watch
pen
insert"
V/
0"
jack,
test
watch
Pen
reliable
contact
test
point,
3.
If
the
measuring
resistance
at
both
ends
of
the
meter
pen
is
less
than
50
,
the
burzer
will
make
a
continuous
noise
and
requires
a
fast
buzzer
measurement,
press
the
power
key
to
manually
select
the
buzzer
fast
measurement
function.
4. If the resistance of the closed loop is measured, the two ends of the measured
resistance must be treated for discharge, otherwise if the voltage in the loop is greater than
0.6 V, the instrument will be mistaken for the voltage measurement and enter the voltage
measurement mode.
5. the resistance between the red and black meter pen is greater than 50 2, the meter
will automatically switch the range according to the actual resistance measurement value,
and then the measured value will be displayed in the LCD.
Note:
1, When measuring low resistance, in order to obtain accurate reading, you can first
record the meter pen short circuit value, subtract the meter in the measurement reading
The value of the pen in short circuit;
2, When measuring the on-line resistance, all the power supply of the circuit must be
turned off and all the capacitors are discharged to ensure the accuracy of the measured
value.
5-3,
diode
measurements
1. Press the power key for more than 2 seconds to turn on the meter. boot display as
automatic scan state "AUTO", press power key to manually select diode measurement
function.
2. Insert black watch pen into "COM" jack, red watch pen insert" V/ ©" jack, test watch
pen
reliable
contact
test
point.
3. meter will show the positive pressure drop of the measured diode on the LCD. If the
polarity of the two ends of the diode in contact with the pen is reversed or the diode is open,
the LCD of the meter will show “OL"."
5-4, capacitance measurements
1. Press the power key for more than 2 seconds to turn on the meter. , boot display as
automatic scan state "AUTO", press power key manually switch to capacitance measurement
function.
2. Insert black watch pen into "COM" jack, red watch pen insert” V/ ©" jack, test watch
pen reliable contact test point.
3. Meter will automatically switch the range according to the capacitance value
between the red and black meters, and the specific value of the measured capacitance will
be displayed on the LCD. The measuring range of the capacitance is 10
nF/100nF/1uF/10uF/100uF/1mF/10mF/60mF..
Note:
1. Please treat the measured capacitance to discharge fully before measuring the
Capacitance, otherwise it will enter the voltage measurement mode.
2.
When
measuring
capacitance
with
10
nF
gear,
the
LCD
display
value
may
have

residual
reading,
the
distributed
capacitance
of
this
digital
meter
pen,
the
bit
accurate
reading
can
subtract
this
value
after
measurement.
3.
A
LCD
will
show
some
values
and
instability
when
measuring
serious
leakage
or
breakdown
capacitance
at
large
capacitance
files;
when
measuring
large
capacitance,
the
reading
takes
a
few
seconds
to
stabilize,
which
is
normal
when
measuring
large
capacitance.
4. Unit 1 F=1000 mF lmFF=1000 uF uF=1000nF nF=1000 pF
5-5,
Current
Test
Function
(DC/AC
A)
1.Press
the
power
key
for
more
than
2
seconds
to
turn
on
the
meter.
The
boot
is
shown
as
automatic
scan
AUTO".
2.
Insert
black
watch
pen
into
"COM"
jack,
red
watch
pen
insert
"10
A"
jack,
test
watch
pen
reliable
contact
test
point.
3.
Input
current
greater
than
20
mA
between
the
input
port
"COM"
and
"10
A",
the
meter
will
display
the
current
value
with
large
de-component
on the
LCD
according
to
the
magnitude
of
the
AC
/
DC
component.
Note:
1, Before the instrument is connected in series to the circuit to be tested, the power in
the circuit should be turned off first;
2, Maximum input current is 10 A( depending on the red meter pen insertion position),
too much current will burn out the internal fuse, be careful, each measurement time must
not be more than 10 seconds, too much current or too long measurement time will make
the instrument circuit heating, or even damage the instrument;
3. Do not connect the meter pen test pin parallel to any circuit when the red meter
pen is inserted in the "10 A" port, this will damage the fuse and meter.
4. After all the measurement operations are completed, the power supply should be
turned
off
first
and
then
the
connection
between
the
meter
pen
and
the
measured
circuit
should be disconnected.
5.
No
more
than
36V
DC
or
25V
AC
voltage
is
entered
between
port
10
and
port
COM".
5-6, NCV measurements
1.
Press
the
power
key
for
more
than
2
seconds
to
turn
on
the
meter.
Press
‘NCV’
key
to
enter
EF
measurement,Keep
pressing
the
key .
2.
Instrument
has
the
NCV
test
induction
end,
the
induction
end
is
close
to
the
AC
voltage
side,
according
to
the
signal
intensity,
the
buzzer
will
make
a
continuous
sound
of
different
frequencies,
at
the
same
time,
the
LCD
will
still
display
different
segments
according
to
the
signal
strength,
VI.
Automatic
Switching
Machine
The instrument has the function of automatic shutdown, when the instrument stops using
for 15 minutes, the instrument will automatically power off into the dormant state; to restart the
power
supply,
hold
down
the
power
key
more
than
2
seconds,
wake
up
the
instrument
into
the
automatic
scanning
measurement
state,
the
LCD
shows
“AUTO"."
If
you
want
to
cancel
the

automatic
shutdown
function,
press
"HOLD"
key
and
power
key
simultaneously
to
wake
up
the
instrument in the instrument dormant state, at this time the automatic shutdown function of the
instrument will be cancelled. ,