Kusam-meco KM 520B User manual

17, Bharat Industrial Estate, T. J. Road, Sewree (W),
Mumbai-400015. INDIA
Sales Direct: 24156638 (022)2412 4540, 2418 1649 2414 9659
E-mail : [email protected], Website : www.kusamelectrical.com,
www.kusam-meco.co.in
Tel.: Fax:
*
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* AC Clamp Adaptor
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LIST OF PRODUCTS
OPERATION
MANUAL
Multi-Function LCR
MODEL KM 520B
OPERATION
MANUAL

1
Thank you for purchasing the multi-function LCR
meter. Please take a few minutes to browse through
this user manual before you begin to operate the
meter to ensure that you are fully familiarized with
how best to operate the meter as accurately and
safely as possible.
Overview
This multi-function LCR meter is a portable
instrument designed with microprocessor control
and low power consumption. It can measure 6 basic
parameters: inductance L, capacitance C, AC
resistance R, DC resistance DCR, dissipation factor
D and quality factor
With battery external power supply, the meter is
ideal for field and portable applications, such as
component inspection at fixed place, and immediate
measurement by maintenance personnel.
Q. The instrument can easily communicate with PC
and realize remote control through USB interface.
Cautions
=This instrument can only be used in indoor.
=Be sure to turn off the instrument when replacing
the battery or DC power adapter.
=Although the instrument has a protection for shocks,
inputing dc voltage or current will still damage the
instrument. The capacitance requires completely
discharge before measuring.
2
=In order to ensure the measurement accuracy,
open / short calibration should be carried out again
after replacing the test fixtures.
=If the instrument is idle for more than 15 days
please take the batteries out.
=Use AAA * 6 batteries. The instrument can not
work properly when low battery voltage indication
appears.
=Do not using the instrument under dusty, vibration,
direct sunlight and corrosion gas. environment
Introduction
Features
=19,999/1,999 counts dual LCD display
=Basic accuracy : 0.3% with resolution of 0.01%
=Analog bar display
=Measurement frequency up to 100KHz
=Mini-USB interface
=Auto LCR smart check and measurement
=Sorting function
=Relative measurement
=Data hold,
=Back light, full angle for LCD display
=4-terminal measurement configuration
=Automatic power off
=Battery and external power supply
=Battery voltage indication.

3
Specifications
Parameters
Primary
Secondary
DCR : DC resistance
Ls/Cs : series inductance /
capacitance
Lp/Cp : parallel inductance /
capacitance
q: phase angle
D: dissipation factor
ESR: equivalent series
resistance
Q : quality factor
RP: equivalent parallel
resistance
Frequency 100/120/1K/10K/100KHz
Display Dual display + analog bar display
Measurement
range
L
100/120Hz
1KHz
10K
100KHz
100/120Hz
1KHz
10K
100KHz
100/120Hz
1KHz
10K
100KHz
200 ~ 200M
0.001 ~ 1999
0.00° ~ ± 180.0°
20mH ~ 20KH
2000mH ~ 2000H
200mH ~ 20H
20mH ~ 200mH
20nF ~ 20mF
2000pF ~ 2mF
200pF ~ 200mF
200pF ~ 20mF
200W~ 200MW
20W~ 200MW
20W~ 20MW
20W~ 2MW
C
R
DCR
D/Q
q
Test Level
Range mode
Equivalent
circuit
0.6 Vrms
Auto and Hold
Parallel and Series
4
Specifications
Calibration function
Interface
Measurement speed
Measurement terminal
Basic accuracy
Power
Auto Power off
Operating
Environment
Storage temperature
Open / Short
Mini - USB
Approx. 1.2 times/second
4-terminal
0.3%
AAA*6 battery or external
power supply
5 min (with batteries)
temperature
humidity
no condensation
0°C ~ 40 °C
£90%RH (40°C
-25°C ~ 50 °C
Impedance Accuracy Ae
The below - listed accuracies are guaranteed by the
meter with normal use under the operating
temperature of 18°C -28°C and relative humidity less
than 80%

5
Note :- All accuracy is guaranteed by proper ratio
resistor calibration and open/short calibration.
If D > 0.1, the accuracy should be multiplied by
Z = 1 , if D << 0.1 in capacitance mode
C
Z = 2pf L, if D << 0.1 in inductance mode
L
2
1+D
2pfc
Sub-display parameters accuracy :
Ae = impedanze (Z) accuracy.
D
Q = 1
Definition :
2
D
1
Rp = ESR (or Rs) x (1+ )
1) D value accuracy : De = ± Ae x (1+D)
2) ESR accuracy : Re = ± Z x Ae (W)
M
i.e., Z = impedance calculated by 1 or 2pf L
M
2pfc
3. Phase angle qaccuracy : qe = ± (180 / p)
x Ae (deg)
Note :-
D : dissipation factor
Q : quality factor
ESR : equivalent series resistance
Rp : equivalent series parallel
resistance
q: phase angle
6
Explanation on Front Panel
The front panel is shown as figure 1.
1) Mini USB interface :- Connect with PC, easily for
data transmission and management.
2) LCD :- Used for displaying the measuring results
and various symbols.
3) key :- Used for putting ON or OFF the operating
power for the meter.
4) Func. Key :- When Func. key is pressed, the main
test mode could be selected sequentially: Auto-LCR
mode-Auto-L mode-Auto-C mode-Auto-R mode-DCR
mode-Auto-LCR mode.
Figure 1
FUNC.
CAL.
GUARD
SORTING
DQESR
FREQ.
ENTER
PC LINK
SET UP
REL%
HOLD
SERPAL
GUARD
INPUT
RX LX CX
LCUR Lpot Hpot HCUR
Press 2 sec
1
2
8 7 6
11 10 9
14 13 12
15
16
3
4
5

7
14) key :- By pressing this key for once, the backlight
of the LCD screen will be turn ON and after 60
seconds the meter will automatically turn off the
backlight. It is also possible to turn off the backlight by
pressing this key before the 60 seconds.
5) CAL key :- Used to do OPEN/SHORT calibration.
6) SORTING key :- Press this key to enter into
sorting mode, which could help the user to make
a quick sort for a bunch of components.
7) PC LINK key :- Press this key to communicate
with PC.
8) HOLD key :- Used to maintain the measurement
data unchanging, by pressing the key again it will
resume the measurement.
9) D/Q/ESR key :- In L/C measurement mode,
press the key to select parameters of D/Q/q/ESR.
10) SETUP key :- When sorting mode is active, press
SETUP key to modify the reference value, range
and the tolerance setting sequentially.
11) SER/PAL key :- Used to select series and
parallel mode.
12) FREQ key :- Press FREQ key to select five
different test frequencies in turn : 100/120/1K/
10K/100KHz
13) REL% key :- Press REL% key to enter into
relative measurement mode. In auto LCR mode,
this key is not available.
8
The instrument has 4-terminal measurement
configuration, as shown in figure 2.
GUARD GUARD
INPUT
Rx Lx Cx
L
Grounding (shielding)
Excitation positive
terminal
Measurement positive terminal
Measurement negative terminal
Excitation negative terminal
Figure-2
Understanding Display Screen
Figure-3
CUR LPOT HPOT HCUR
15) ENTER key :- In sorting mode, press ENTER key
to confirm the data modification.
16) Measurement terminal
LCD screen is shown as in Figure 3, with its every
symbol's meaning shown as in the Table 1:

9
NO. MEANING NO. MEANING
1
2
3
4
5
6
7
8
9
10
Auto power off indication
Data hold
Auto mode indication
Auto LCR mode indication
Range indication
Relative Measurement mode
Main-display
Unit for main parameters
Secondary parameters
Unit for secondary parameters
11
12
13
14
15
16
17
18
19
20
Sub-display
Analog bar indication
The meter is in the data transmission mode.
battery indication (with battery supply)
Frequency indication
Tolerance range
Sorting mode indication
External power supply
Open/Short calibration mode indication
Primary parameters
Operating instruction
Power on the meter
Press key to turn ON the power. The default mode is
AUTO LCR smart mode and the default test frequency
is 1kHz. When key is pressed during power-on
mode, the instrument will enter power-off mode. The
LCD will show the "OFF" state before power off.
Function Descriptions
Press FUNC. key to select the following parameters
sequentially : AUTO LCR, L-Q, C-D, R, DCR.
1) Parameters setting
Parameter MEANING
AUTO-LCR
L-Q
Auto LCR smart mode
Inductance measurement, the parameter
on sub-display is quality factor Q
C-D Capacitance measurement, the parameter
on sub-display is dissipation factor D.
RResistance measurement
DCR DC resistance measurement mode
L/C/R measurement readings can be positive or
negative. In C-D measurement, If the main parameter
is "-", the actual component being tested is inductive;
In L - Q measurement, if the main parameter is "-", the
actual component being tested is capacitive;
Theoretically, R is positive, in some cases, R is "-",
which may be calibration error, please re-calibrate the
instrument.
2. Auto LCR smart Mode
The default test mode is Auto LCR mode which could
check the type of impedance smartly.
If I qI < 11°, the Auto - R mode is selected. The
parameter on sub - display is q.
If q> 11°, the Auto - L mode is selected. The
parameter on sub - display is Q.
If q< -11°, the Auto - C mode is selected. The
parameter on sub - display is D.
If the C < 5pF, the parameter on sub-display is parallel
resistance Rp.
Note : In order to avoid damaging the instrument,
the capacitance requires discharge before
measuring.
3. Frequency setting
Press FREQ key to select frequency value : 100/120/
1K/10K/100KHz. The LCR impedance scale ranges
are depended on the test frequency.
4. Data Hold
Press this key to hold the measurement data and
press it again to resume the measurement.
10

11
"REL" symbol appears on LCD. The secondary
display will show the percentage of relative value
REL%
The REL% = (present value - initial value) / initial
value * 100%.
Press REL% key again to show the current
readings on primary display and the "REL" symbol
will be blinking. The percentage range is from
-99.9% ~ 99.9% when the present value is larger
than double of initial value, the "OL%" indication
will be shown on the secondary display.
During relative measurement, analog bar is
always indicating the present measurement
value but not the relative value.
6. Open / Short calibration
1) Press CAL key larger than 2 seconds to start the
open / short calibration procedure.
2) In open calibration mode, the secondary display
will show "Open". There are two ways for open
state input:
a) When using square terminals, the square
and the air
(shown in figure 4);
terminals
LCUR / LPOT / HPOT / H
CUR terminals hang in
5. Relative mode
During relative measurement the meter remembers
the current readings on primary display (called
initial value) when pressing the REL% key, and
12
b) When using insert
the black and red testing lines with alligator clip
into the " "," ",terminal and "
terminal respectively. Connect the mouth of clips
(shown in figure 7).
LCUR / LPOT / HPOT / HCUR terminals
LCUR LPOT CUR
H ", "H
POT".
a) When using square terminals, insert the short
soket to the square terminal and make
terminals hang in the air
(shown in figure 6);
LCUR / LPOT / HPOT / H
CUR
b) When using insert
the black and red testing lines with alligator clip into
the " "," ",terminal and "
respectively. (shown in figure 5).
HCUR terminals
POT
LCUR / LPOT / HPOT /
LCUR LPOT H ", "H terminal
CUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
Figure 4 Figure 5
3) Press CAL key and the 30-second countdown
will be shown on LCD panels. If the open
calibration is finished, the PASS or FAIL symbol
will be shown on the primary display. Press
CAL key again to save the calibration data
and enter into the short calibration mode.
4) In short calibration mode, the secondary
display will show "Srt". There are two ways for
short state input:

13
GUARD GUARD
LCUR LPOT HPOT HCUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
SHORT
Figure 6 Figure 7
5) Press CAL key and the 30-second countdown
will be shown on LCD panels. If the short calibration
is finished, the PASS or FAIL symbol will be shown on
the primary display. Press CAL key again to save
the calibration data.
Note: 1) To get the better accuracy, the open / short
calibration should be done before measurement.
2) The purpose of open / short calibration is to
reduce the parasitic effect of the test fixture.
3) Open or short circuit, is selected automatically
according to the measurement terminal.
4) In short calibration, there may be FAIL situations,
which may be caused by not using the low
resistance short line or unreliable contact, please
try again after reliable short - circuit
14
8. Sorting mode
The sorting mode could help the user to make a
quick sort for a bunch of components. The setting
step as following:
1) Accordings to the component type, press FUNC,
key to select L, C or R measurement mode.
2) Insert the standard component into the input
therminal, Press SORTING key to enter into the
sorting mode and the "Sorting" symbol appears on
LCD. If the LCD reading is OL or less than 200
counts, the SORTING key is not available.
If the impedance is larger than 10KW, parallel mode
is set and Lp/Cp/Rp is shown on the display.
If it is less than 10KW, series mode is set and Ls/Cs
/Rs is shown on the display. When SEL/PAL key is
pressed, the impedance measurement will be set in
series mode on in parallel mode sequentially.
Note :- The actual capacitance, inductance and
resistance is not ideal component of pure reactance
and pure resistance. Usually the resistance and
reactance exist simultaneously. A practical impedance
can be simulate by the ideal resistors and ideal
reactor (inductor or capacitor) in series or parallel
form.
When any L/C/R functional mode is selected, the
default measurement in series or parallel mode is
auto selected and the AUTO segment will be shown
on LCD display. It depends on the total equivalent
impedance measured.
7. Equivalent Circuit

15
7) After setting the parameters, remove the
standard component and insert the component
to be measured. If the impedance measured
does not exceed tolerance range, the primary
display will show "PASS", otherwise show
"FAIL". The current measurement result will be
shown on the secondary display.
3) When sorting mode is active, press SETUP key
to modify the range, reference value and the
tolerance settings sequentially.
4) "Range" symbol is flashing when setting the
range. Press D/Q/ESR ( ) key to shift the decimal
point, unit to left and press SER/PAL ( ) key to
right. Press ENTER key to confirm and enter into
the reference value setting mode automatically. At
this time, "Range" symbol disappear.
5) When setting the reference value, press D/Q/ESR
( ) key and SER/PAL ( ) key to shift the bit to left
and right respectively. Press PCLINK ( ) key and
REL % ( ) key to make the digit +1 or -1. The
flashing bit is the current setting bit. The reference
value setting is available from 20 to 1999 counts.
Press ENTER key to confirm and enter into the
tolerance setting mode automatically.
6) When setting the tolerance, press D/Q/ESR ( )
key & SER/PAL key to select tolerance range :
± 0.25% ± 0.5% ±1% ±2% ±5% ±10%
±20% ± 80%-20%. The default tolerance is
±1%. Press ENTER key to confirm.
16
8) Press SORTING key again to exit the sorting mode.
Note: In AUTO LCR mode, the SORTING key is
not available.
9. PC-LINK mode
Press PCLINK key "USB" symbol appear on
LCD. Connect the instrument to PC through
USB interface, and the measured data can be
recorded, analyzed, processed and printed by
PC. Press PCLINK key again to cancel the data
transmission. Then USB symbol disappears.
Due to the power consumption in data
transmission, please exit USB mode when there
is no need to transmit data.
Operating step
1.Inductance measurement
1) Turn on the power.
2) There are two ways for inductance input:
a. Insert the inductance to be measured into the
input terminal directly (shown in figure-8);
b. Connect the alligator clips to the ends of the
inductance to be measured (shown in figure-9).
3) The default test mode is Auto LCR mode, the
inductance value will be shown on primary
display and the quality factor Q will shown on
secondary display. In Auto LCR mode, the D/Q/
ESR key, SEL / PAL key, SORTING key and
REL% key are not available

17
4) Press FUNC. key to select Auto-L-mode. The
primary LCD display will show the quality factor Q.
The equivalent resistance ESR/Rp, phase angle q
or dissipation factor D can also be shown by
pressing the D/Q/ESR key.
5) Press FREQ key to select frequency value: 100/
120 /1K/10K/100KHz.
6) Press SER/PAL key to select series or parallel mode.
2. Capacitance measurement
1) Turn on the power.
2) If voltage exists in the capacit or connect the two
ends of the capacitors for a short time to discharge.
3) There are two ways for capacitance input:
a. Insert the positive polarity of capacitance into the
positive terminal and its negative polarity into the
negative terminal (shown in figure 10);
b. Insert the black and red testing lines with alligator
clip into the "LCUR", "LPOT", terminals and "HCUR", "HPOT",
terminal respectively. Connect the alligator clips to
the ends of capacitance corresponding to its polarity
(shown in the figure 11).
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
Figure 8 Figure 9
18
4) The default test mode is Auto LCR mode, the
capacitance value will be shown on primary display
and the dissipation factor D will be show on secondary
display. In Auto LCR mode, the D/Q/ESR key, SEL/PAL
key, SORTING key and REL% key are not available.
Note :- 1) When Auto-LCR mode is active, the secondary
parameter will show the equivalent resistance
in parallel mode (Rp) to replace the D factor if
the C measured value is less than 5pF.
2) In order to avoid damaging the instrument,
the capacitance requires discharge before
measuring
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
Figure 10 Figure 11
7) Press SER/PAL key to select series or parallel mode.
6) Press FREQ key to select frequency value: 100/
120 /1K/10K/100KHz.
5) Press FUNC. key twice to select Auto-C mode.
The primary LCD display will show the capacitance
value. The secondary LCD display will show the
dissipation factor D. The quality factor Q, equivalent
resistance ESR/Rp or phase angel qcan also be
shown by pressing the D/Q/ESR key.

19
3. Resistance measurement
1) Turn on the power.
2) There are two ways for resistance input:
a. Insert the resistance to be measured into the input
terminal directly (shown in figure-12);
b. Connect the alligator clips to the ends of the
to be measured (shown in figure-13).resistance
7) Press FUNC. key four times to select DCR mode.
The primary LCD display will show the resistance
value. The secondary parameter is omitted and
the D/Q/ESR key, SEL/PAL key and FREQ key
are not available.
6) Press SER / PAL key to select series or parallel
mode.
5) Press FREQ key to select frequency value:
100/120 /1K/10K/100KHz.
4) Press FUNC. key three times to select Auto-R
(ACR) mode, The primary LCD display will
show the resistance value. The secondary
parameter is omitted and the D/Q/ESR key. is not
available.
3) The default test mode is Auto LCR mode, the
resistance value will be shown on primary display
and the phase angle qwill be shown on
secondary display. In Auto LCR mode, the D/Q/
ESR key, SEL/PAL key, SORTING key and REL
% key are not available
20
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
GUARD GUARD
INPUT
Rx Lx Cx
LCUR LPOT HPOT HCUR
Figure 12 Figure 13
1) Connect the AC power cord to the AC-DC
converter
2) Plug the AC power cord into an electrical outlet
(100V-240V).
3) Plug the DC power plug of the convertor into DC
power socket of the meter
DC power
Socket
DC power
Plug AC-DC
AC power
Cord
Converter.
AC/DC adapter information:
Input : 100V-240VAC, 50-60Hz 1.8A
Output : DC 12V 2A MAX
Polarity : +-
To use Adapter (Under external power adapter,
the automatic power off function is not available).
Connecting the power adapter:
Note : The phase angle qwill show on secondary
display only in Auto-LCR mode. During
Auto-R mode or DCR mode, the secondary
parameter is not available.

21
MAINTENANCE
Cleaning :- Periodically wipe the case with a damp
cloth do not use abrasives or solvents.
Calibration :- Calibrate your instrument once a year
to ensure that it performs according to its
specifications.
7) Do not use the AC power adapter in a high
temperature or wet place.
8) Please make the AC power adapter avoid a strong
bump.
9) It is normal when the AC power adapter make
some noise in use.
1) Please use the original AC power adapter, using
other AC power adapter may damage your
instrument.
2) The AC power adapter can only be used indoors.
4) Do not use the AC power adapter in other equipment
except this instrument.
5) In use, it is a normal phenomenon that the AC power
adapter will be hot.
6) Do not demolish the AC power adapter. Otherwise, it
may be dangerous
WARNING:
3) Please plug the AC power cord into an electrical
outlet first and then firmly insert DC plug into DC
input end in the right of the meter. When unplugged,
firstly pull out the DC plug perpendicular to DC input
end and then unplug the AC plug from the electrical
outlet.
Figure 14
GUARD GUARD
LCUR LPOT HPOT HCUR
OPEN
Note : To get the better accuracy, when using
LCUR/LPOT/ HPOT/HCUR/ terminal measured with the
alligator clip-testing lines, Please insert the open
soket to the square terminals (shown in figure 14).
If there are some changes in accessories, please
refer to the real products as standard.
ACCESSORIES
=User manual.
=AAA batteries
=Shielding clip line
=Kelvin 4-terminal measure line
=Short socket
=USB line (USB model only)
=PC-Link software CD
(USB model only)
One piece
Six piece
One piece
One piece
One piece
One piece
One piece
Turn off the power of the instrument. When you
change the battery, and screw off the breechblock
on the battery cabinet cover, then take off it and
replace with fresh battery.
Replacing the Battery :- Please change the
battery when the battery symbol is less than
one segment.
22

WARRANTY
Each “KUSAM-MECO” product is warranted to be free from
defects in material and workmanship under normal use &
service. The warranty period is one year (12 months) and
begins from the date of despatch of goods. In case any defect
occurs in functioning of the instrument, under proper use, within
the warranty period, the same will be rectified by us free of
charges, provided the to and fro freight charges are borne by
you.
This warranty extends only to the original buyer or end-user
customer of a “KUSAM-MECO” authorized dealer.
This warranty does not apply for damaged Ic’s, burnt PCB's,
fuses, disposable batteries, carrying case, electrodes probes,
cables or to any product which in “KUSAM-MECO’s” opinion, has
been misused, altered, neglected, contaminated or damaged by
accident or abnormal conditions of operation or handling.
“KUSAM-MECO” authorized dealer shall extend this warranty on
new and unused products to end-user customers only but have no
authority to extend a greater or different warranty on behalf of
“KUSAM-MECO”.
“KUSAM-MECO’s” warranty obligation is limited, at option, free of
charge repair, or replacement of a defective product which is
returned to a “KUSAM-MECO” authorized service center within
the warranty period.
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN
LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. “KUSAM-MECO” SHALL
NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA,
ARISING FROM ANY CAUSE WHATSOEVER.
All transaction are subject to Mumbai Jurisdiction.
24
This Test Certificate warrantees that
the product has been inspected and
tested in accordance with the published
specifications.
QC
PASS
KUSAM-MECO
TEST CERTIFICATE
Multifunction LCR
MODEL NO. __________
KM 520B
SERIAL NO. ___________
MUMBAI
DATE: ___________
ISO 9001
REGISTERED
23