Kusam-meco 405 User manual

DIGITAL
MULTIMETER
405

Nearly every electrical engineer has a hand held
digital multimeter (DMM). We sometimes take them
for granted, until we damage them or “burn them out”
if you incorrectly connect your DMM to a circuit, or if
you have the DMM on wrong setting, you damage the
meter and possibly hurt yourself. You can also get into
trouble if you try to measure the voltage across a
charged capacitor.
DMM users frequently burn their meters by trying
to measure current the same way as they measure
voltage, Remember, you measure voltage across a
circuit, and current through a circuit. When you use
the current input, your DMM becomes a lower
impedance circuit element. If you accidentally
connect this low impedance path across your circuit,
you’ll effectively short-circuit it. You can, therefore
send high current through your meter and severely
damage it. Unless the meter has a fused input, you
can even get an explosion or fire.
Even if you correctly insert your DMM into the
circuit, you can still damage your meter. Don’t try to
measure current in excess of your meter’s capacity.
Handheld DMMs usually have a maximum current
rating of 10Aor 20A.
If you are measuring current in industrial
environment, you can easily exceed those ratings.
The best way to avoid damage is to use a clamp
meter or to connect a clamp attachment to your DMM.
To prevent excess current from flowing through
your meter, always disconnect the test leads from the
circuit under test whenever you change DMM
functions, Set your meter to the correct function, say
current and its highest range for the setting, say 10A.
Next, connect the test leads before you apply power
to the circuit. To be safe, start by setting your meter to
its highest range first.
TAKE MEASUREMENT CAREFULLY AND YOU’LL
SPARE YOUR METER AND YOURSELF, SOME PAIN
Table of Contents
Title Page
Overview
Unpacking Inspection
Features
General Specification
Electrical Specification
DC Voltage
AC Voltage
AC Current
DC Current
Resistance
Frequency
Duty Cycle
Logic Test
Continuity & Diode Test
Rules For Safe Operation
International Electrical Symbols
The Multimeter Structure
Functional Buttons
Display symbols
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. AC Current Measurement
D. DC Current Measurement
E. Measuring Resistance
F. Measuring Frequency
G. Duty Cycle Measurement
H. Logic Testing
I. Diode Test & Continuity
Maintenance
A. Replacing the Battery & fuse
Test Certificate
Warranty
1
2
3
4
5
8
9
10
11
12
13
13
15
16
18
19
21
23
23
24
26
26
27
29

Overview
Warning
To avoid electric shock or personal injury, read
the “Safety Information” and “Rules for Safe
Operation”carefully before using the Meter.
Digital Multimeter Model - 405 (hereafter referred to
as “the Meter”) is a 4½ digits TRMS Multimeter with
steady operations, and highly reliable hand-held
measuring instrument having different measurement
positions. The Multimeter not only can measure
AC/DC Voltage, AC/DC Current, Resistance,
Frequency, Diode Test, Logic Test, but also has
Data Hold, Full Icon Display.
Terms in this manual
Warning : Identifies conditions and actions
that could result in serious injury
or even death to the user.
Caution : Identifies conditions and actions
that could cause damage or
malfunction instrument.
!
!
1
Unpacking Inspection
Open the package case and take out the Multimeter.
Check the following items carefully to see any
missing or damaged part :
Item Description Qty.
1 English Operating Manual 1 piece
2 Test Lead 1 pair
In the event you find any Part missing or damaged,
please contact your dealer immediately.
2

FEATURES :
nLow power consumption CMOS double
integration, A/D transform integrated circuit,
Auto Zero Calibration, Auto Polarity display,
Data Hold, Low Battery & Over range
indication.
nDisplay : 4½ digit (19999 Counts) with digit
height 17mm and function/units sign
annunciators.
nSelected Range displayed on LCD.
nHigh Accuracy - Digital Reading.
nInstant Continuity Buzzer.
nOverload Protection in all Ranges.
nRecessed Safety Designed Input Jacks.
n“ DATA - HOLD ” switch freezes reading.
nCE Approved, GS-approved.
nIEC61010 overload category II
3
GENERAL SPECIFICATIONS :
Display : 4½ digit LCD.
Maximum reading 19999
with Function and unit sign
annunciators.
Digit Size : 17mm(H)
Polarity : Automatic, (-) negative
polarity indication.
Overrange : ‘1’ most significant digit.
indication
Low Battery : The “ ” sign is displayed
Indication when the battery voltage
drops below the operating
Voltage.
Auto Power : Meter automatically shuts
Off down after approx.
45.minutes of inactivity.
Measurement rate : 2.5 times per Second, nominal
Operating : 0°C to + 50°C, <70% R.H.
environment
Storage : -20°C to 60°C, 0 to 80% RH
temperature with battery removed.
Power : Single 9 V Battery.
Power : 14mW Typical.
Consumption
Dimension : 189mm (H) X 87mm(W) X
37mm(D)
Weight : Approx. (330 grams)
including battery.
Accessories : Test Leads, Carrying Case,
User Manual, Battery,
Tilt stand, Protective Holster
- +
4

ELECTRICAL SPECIFICATION :
AC VOLTAGE 50Hz~500Hz (TRUE RMS)
Input Impedance : 10MW
Overload Protection : 500V DC or 350Vrms
on 200mV range, 1000V DC or 750Vrms
on all other range
Accuracy
±(1.0% rdg +10 dgts)
±(2.0% rdg + 20 dgts)
Resolution
10 mV
100 mV
1 mV
100 mV
10 mV
Range
200 mV
2 V
20 V
750 V
200 V
Input Impedance : 10MW
Overload Protection : 500V DC/350Vrms
on 200mV range, 1000V DC/750V rms
on all other ranges
DC VOLTAGE
Accuracy
±(0.05% rdg + 3dgts)
Resolution
10 mV
100 mV
1 mV
100 mV
10 mV
Range
200 mV
2 V
20 V
1000 V
200 V
Input Impedance : 10MW
Overload Protection : 500V DC or 350Vrms
on 200mV range 1000V DC or 750Vrms
on all other range
AC VOLTAGE 500Hz to 2KHz (TRUE RMS)
Accuracy
Unspecifled
±(2.0% rdg + 20 dgts)
Resolution
10 mV
100 mV
1 mV
100 mV
10 mV
Range
200 mV
2 V
20 V
750 V
200 V
5
AC CURRENT (TRUE RMS)
Burden Voltage : 300mV for 200mA, 2mA, 20mA
600mV for 200mA & 800mV for 20A.
Overload Protection : 500mA/600V fuse on mA
inputs (fast blow ceramic fuse). * 20A/600V fuse on
20A inputs (fast blow ceramic fuse).
20A for 30 seconds maximum.
Accuracy
±(0.8% rdg + 10 dgts)
±(2.5% rdg + 10 dgts)
Resolution
10 nA
1 mA
10 mA
100 nA
1 mA
Range
200 mA
20 mA
20 A*
2 mA
200 mA
RESISTANCE
Overload Protection : 500V DC or AC rms
Burden Voltage : 3.3V DC
Accuracy
±(0.25% rdg + 10 dgts)
±(0.25% rdg + 10 dgts)
±(0.15% rdg + 3 dgts)
±(1.0% rdg + 10 dgts)
Range
200 W
2 KW
20 KW
200KW
2 MW
20 MW
Resolution
0.01 W
0.1 W
1 W
10 W
100 W
1 KW
Burden Voltage : 300mV for 200mA, 2mA, 20mA
600mV for 200mA & 800mV for 20A.
Overload Protection : 500mA/600V fuse on mA
inputs (fast blow ceramic fuse). * 20A/600V fuse on
20A inputs (fast blow ceramic fuse).
20A for 30 seconds maximum.
DC CURRENT
Accuracy
±(0.5% rdg + 5 dgts)
±(2.0% rdg + 10 dgts)
Resolution
10 nA
1 mA
10 mA
100 nA
1 mA
Range
200 mA
20 mA
20 A*
2 mA
200 mA
6

DUTY CYCLE
AccuracyPulse Width
> 10msec. ±(2.0% rdg +10dgts)
Range
0 - 90.0%
Resol.
0.1%
Overload Protection : 500V DC or AC rms
Frequency Range : 20 Hz to 20 KHz
FREQUENCY
Sensitivity : 50mV rms (Sine Wave), 400mV rms
at > 30% and < 70% duty cycle
Input Frequency : More than 10 Hz at pulse width > 2msec.
Overload Protection : 500V DC or AC rms
Range
2 KHz
20 KHz
200KHz
Accuracy Input Imped.
±(0.5% rdg+3dgts) 10MW// 10pF
Resolution
0.1 Hz
1 Hz
10 Hz
DIODE TEST
Open Circuit
Volts
Resol.
±(0.5% rdg + 1dgt) 3.3V DC Typical
1.0mA
Range
2 V
Accuracy Test
Current
0.1mV
Overload Protection : 500V DC or AC rms
CONTINUITY TEST
Open Circuit
Volts
3.3V DC Typical
Response
Time
Approx. 500ms
Range
2 V
Audible
Indication
Less than 150W
Overload Protection : 500V DC or AC rms
Test Voltage : 5V DC
Duty Cycle : >20% and <80%
Indication : 40msec beep at logic Hi
Overload Protection : 500V DC or AC rms
Frequency Response : 20MHz
LOGIC TEST
Threshold Pulse
Width(min)
Logic Hi Logic Low
2.8V±0.8V 0.8V±0.5V 25ns
Pulse Rep
(max)
1Mpps
Pulse Rise
(max)
10msec
7
Rules For Safe Operation (1)
Warning
To avoid possible electric shock or personal
injury, and to avoid possible damage to the
Meter or to the equipment under test, adhere to
the following rules :
nBefore using the Meter inspect the case. Do not
use the Meter if it is damaged or the case (or
part of the case) is removed. Look for cracks or
missing plastic. Pay attention to the insulation
around the connectors.
nInspect the test leads for damaged insulation or
exposed metal. Check the test leads for
Continuity. Replace damaged test leads with
identical electrical Specifications before using
the Meter.
nDo not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
nThe rotary switch should be placed in the right
position and no any changeover of range shall
be made while measurement is conducted to
prevent damage of the Meter.
nWhen measurement is taken at an effective
voltage over 60V in DC or 30V rms in AC,
special care should be taken for there is danger
of electric shock.
nUse the proper terminals, function, and range
for your measurements.
nDo not use or store the Meter in an environment
of high temperature, humidity, explosive,
inflammable and strong magnetic field. The
performance of the Meter may deteriorate after
the meter is dampened.
nWhen using the test leads, keep your fingers
behind the finger guards.
!
8

nDisconnect circuit power and discharge all high
-voltage capacitors before testing resistance,
continuity, diodes, or current.
nReplace the battery as soon as the battery
indicator appears. With a low battery, the
Meter might produce false readings that can
lead to electric shock and personal injury.
nTurn the Meter power off when it is not in use
and take out the battery when not using for a
long time.
nConstantly check the battery as it may leak when
it has not been used for some time, replace the
battery as soon as leaking appears. A leaking
battery will damage the Meter.
- +
International Electrical Symbols
- +
~
!
~
AC (Alternating Current).
DC (Direct Current).
Both DC & AC.
Grounding.
Double Insulated.
Deficiency of Built-In Battery.
Continuity Test.
Diode.
Fuse.
Warning ! Refer to the Operating Manual.
Logic test
Caution ! Risk of Electric Shock.
Rules For Safe Operation (2)
9
1) LCD DISPLAY :
A 4½ digit display (maximum reading 19999)
indicates measured values, and features
symbols indicating function, Low Battery,
Continuity, Diode, Logic.
2) FUNCTION SELECTOR :
To Select ACV, DCV, ACA, DCA, Resistance,
Frequency, Diode, Continuity & Logic Test.
3) INPUT JACKS (VW,mA,Aand COM) :
Test leads are inserted into these jacks for
Voltage, Resistance, Current measurements,
Continuity & Diode Checks.
4) PROTECTIVE HOLSTER :
Prevents the instrument from damage.
The Multimeter Structure (see figure 1)
( Figure 1)
W
1000V
750V
MAX
200mA MAX
FUSED
20A MAX
FUSED
CAT. II
405 MULTIMETER
20A
mA mA
COM
VWHz
POWER
AUTO POWER OFF
TRUE RMS
DATA
HOLD
TUV SAFETY APPROVED TO IEC1010
20m
20A
20m
20A
A
A
2
200m
200m
2m
200m
20M
2M
200k
20k
2k
200
2k
20k
200k
200m
2m
200m
200m
2
20 200 750
LOGIC
20
2
200
1000
DUTY%
Hz
V
V
1.9999
V
DC
LOGIC
4
1
3
2
10

Functional Buttons
Below table indicates the functional button operations
Buttons
POWER
(Black Button)
Operation Performed
Switch the Meter on and off.
nPress the POWER button to
switch on the Meter.
nPress the POWER button to
turn off the Meter.
DATA-HOLD
(Black Button)
nPress HOLD Button to hold the
reading on the display.
nPress HOLD button again to
exit hold mode.
Display Symbols (see figure 2)
( Figure 2)
H
~
Symbol
No.
1
2
Meaning
Dangerous Voltages.
The battery is low.
Warning : To avoid false readings,
which could lead to possible electric
shock or personal injury, replace the
battery as soon as the battery
indicator appears.
- +
3Indicator for AC voltage or current, The
displayed value is the mean value.
~
!
4
5
6
7
8
9
10
Indicates negative reading.
Test of diode.
Data Hold is active.
The continuity buzzer is on.
A : Amperes (amps). The unit of current.
V : Volts. The unit of voltage.
Hz : The unit of frequency.
A
V
Hz
% : The unit of Duty cycle.
%
H
W, kW,
MW
12 W: Ohm. The unit of resistance.
3
KW: kilohm. 1 x 10 ohms.
6
MW: Mega Ohm 1 x 10 ohms.
13
11
: The symbol of logic Hi
: The symbol of logic Low
1.9.9.9.9
11 12

The DC Voltage ranges are :200mV, 2V, 20V, 200V,
1000V.
To measure DC voltage, connect the Meter as
follows :
1) Insert the red test lead into the VWinput terminal
and the black test lead into the COM input
terminal
2) Set the rotary switch to an appropriate
measurement position in V range.
3) Connect the test leads across with the
object being measured.
The measured value is shown on the display.
nIf the value of voltage to be measured is
unknown, use the maximum measurement
position (1000V) and reduce the range step by
step until a satisfactory reading is obtained.
nThe LCD displays “1” indicating the existing
selected range is overloaded, it is required to
select a higher range in order to obtain a correct
reading.
nIn each range, the Meter has an input impedance
of approx. 10MW. This loading effect can cause
measurement errors in high impedance circuits.
If the circuit impedance is less than or equal to
10kW, the error is negligible (0.1% or less).
nWhen DC voltage measurement has been
completed, disconnect the connection between
the testing leads and the circuit under test.
Caution :
14
- +
( Figure 3 )
W
1000V
750V
MAX
200mA MAX
FUSED
20A MAX
FUSED
CAT. II
405 MULTIMETER
20A
mA mA
COM
VWHz
POWER
AUTO POWER OFF
TRUE RMS
DATA
HOLD
TUV SAFETY APPROVED TO IEC1010
20m
20A
20m
20A
A
A
2
200m
200m
2m
200m
20M
2M
200k
20k
2k
200
2k
20k
200k
200m
2m
200m
200m
2
20 200 750
LOGIC
20
2
200
1000
DUTY%
Hz
V
V
1.9999
V
DC
LOGIC
! !
...
...
RedBlack
~
nMake sure the Low Battery display is not
on, otherwise false readings may be provided.
nPay extra attention to the symbol which is
located besides the input terminals of the Meter
before carrying out measurement.
!
A) DC voltage measurement (see figure 3)
!
Warning
Measurement Operation
To avoid harms to you or damages to the Meter
from electric shock, please do not attempt to
measure voltages higher than 1000V or 750V rms
although readings may be obtained.
1313

Never attempt an in - circuit current measurement
where the open circuit voltage between terminals and
!
Warning : (figure 5)
RedBlack
~
W
1000V
750V
MAX
200mA MAX
FUSED
20A MAX
FUSED
CAT. II
405 MULTIMETER
20A
mA mA
COM
VWHz
POWER
AUTO POWER OFF
TRUE RMS
DATA
HOLD
TUV SAFETY APPROVED TO IEC1010
20m
20A
20m
20A
A
A
2
200m
200m
2m
200m
20M
2M
200k
20k
2k
200
2k
20k
200k
200m
2m
200m
200m
2
20 200 750
LOGIC
20
2
200
1000
DUTY%
Hz
V
V
1.9999
V
DC
LOGIC
! !
...
...
C) AC Current Measurement (see figure 5)
nIf the value of voltage to be measured is
unknown, use the maximum measurement
position (750V) and reduce the range step by
step until a satisfactory reading is obtained.
nThe LCD displays “ 1 “ indicating the existing
selected range is overloaded, it is required to
select a higher range in order to obtain a
correct Reading.
nWhen AC Voltage measurement has been
completed, disconnect the connection between
the testing leads and the circuit under test.
Caution :
16
Warning :
To avoid harm to you or damages to the Meter
from electric shock, please do not attempt to
measure voltages higher than 1000V or 750V
rms although readings may be obtained.
The AC Voltage measurement has 5 measurement
positions on the rotary switch : 200mV, 2V, 20V,
200V and 750V
To measure AC Voltage, connect the Meter as
follows :
1) Insert the red test lead into the VWterminal
and the black test lead into the COM terminal.
2) Set the rotary switch to an appropriate
measurement position in V ~ range.
3) Connect the test leads across with the object
being measured.
The measured value is shown on the display,
!( figure 4)
RedBlack
~
W
1000V
750V
MAX
200mA MAX
FUSED
20A MAX
FUSED
CAT. II
405 MULTIMETER
20A
mA mA
COM
VWHz
POWER
AUTO POWER OFF
TRUE RMS
DATA
HOLD
TUV SAFETY APPROVED TO IEC1010
20m
20A
20m
20A
A
A
2
200m
200m
2m
200m
20M
2M
200k
20k
2k
200
2k
20k
200k
200m
2m
200m
200m
2
20 200 750
LOGIC
20
2
200
1000
DUTY%
Hz
V
V
9.1999
V
DC
LOGIC
! !
...
...
B) AC Voltage Measurement (see figure 4)
15