Page 1
M
LCR131
Dual display meter
User Manual
Page 2
LCR131
Parameters Measured L/C/R/D/Q
Measuring Circuit Mode
Inductance (L)
–Defaults to series mode
Capacitance/ Resistance (C/R)
-Defaults to parallel mode
Displays L/C/R: Maximum display 19999
D/Q: Maximum display 999 (Auto Range).
Ranging Mode Auto & Manual
Measuring Terminals 3 terminals with sockets
Test Frequency
Accuracy:
±0.1 %
120Hz= 120 Hz
1KHz =1010 Hz
Backlit display Excluded
Tolerance mode 1%, 5%, 10%
Test Signal Level 0.6Vrms approx.
Measuring Rate 1 time/second, nominal
Response time
Approx. 1 second/ DUT (device under
test)(@ manual range)
Auto Power-Off 5 minutes approx. without operation
Temperature Coefficient
0.15 x (Specified Accuracy) / (0-18 or
28-40 )
Operation Temperature
0 to 40 ; 0-70% R.H.
Storage Temperature
-20 to +50 ; 0-80% R.H.
Low Battery Indication
Approx. 6.8V
Protective Fuse 0.1A/250V Fuse (input protective)
Standard Accessories Test alliga t or clips (pair)
DC 9V Battery.
User manual
Optional Accessories Carrying case
RS232 package
SMD Tweezers
DC Adaptor (EA112: AC120V) / (EA55:
AC220V).
Dimensions (L/W/H) 184/ 87/ 41 mm
Weight 330 grams
Page 3
i
LCR131 COMPONENT TE STER
USER MANUAL
Page 4
ii
T able of Contents
PAGE
Safety
1
Introduction
3
Front Panel Illustration
4
LCD Display Illustration
5
How to Operate
7
Operating Instructions
11
Data Hold
11
Static Recording
11
Dissipation Factor / Quality Factor
11
Test Frequency
12
L/C/R function selector
12
Relative
12
Tolerance
12
Auto/manual ranging
13
Automatic Fuse Detection
13
Parallel / Series Mode
13
Calibration
14
Auto Power Off/ Disable Auto Power Off
15
Low Battery Indication
15
Communication
15
General Specification
17
Electrical Specification
18
Maintenance
21
Page 5
1
Safety
Read "SAFETY INFORMATION" before using this meter.
NOTE
This meter is a hand-held, battery-operated instrument for
testing inductance, capacitance and resistance. If this device
is damaged or has any parts mi ssin g, c ontact the retailer
immediately.
This manual contains information and warnings which must
be followed to ensure safe operation as well as to ensure the
meter remains in a safe condition. Some common
international electrical symbols used in this manual are
shown in the table below:
DC - Direct Current
See Explanation In The
Manual
Table 1-1. International Electrical Symbols
Before usin g the m eter, re ad the f ollowing s afety i nformatio n
carefully. In this manual, "WARNING", is reserved for
conditions and actions that pose hazard(s) to the user;
"CAUTION", is reserved for con ditions and actio ns that may
damage your meter.
Page 6
2
SAFETY INFORMATION
To ensure that you use this device safely, follow the
safety guide lin es lis te d bel ow :
This meter is for indoor use, altitude up to 2,000 m.
The warnings and precautions should be read and well
understood before the instrument is used.
Use this device only as specified in this manual; otherwise,
the protection provided by the meter may be impaired.
When measuring in-circuit components, first de-energize
the circuits before connecting to the test leads.
Discharge capacitors before testing.
The power for the meter is supplied with a single standard
9V batter y. It is also possibl e t o use exter nal pow er usi n g
a 12V DC adaptor conforming to IEC 60950.
Page 7
3
Introduction
This 19,999-count L/C/R hand-held meter is a special
microprocessor-controlled meter for measuring functions of
inductance, capacitance and resistance. Extremely simple
to operate, the instrument not only takes absolute parallel
mode measurements, but is also capable of series mode
measurement. The meter provides direct and accurate
measurements of inductors, capacitors and resistors with
different testi ng frequencies. It is possible to select betw een
auto and manual ranging.
Front panel pushbuttons maximize the convenience of
function and feature selection such a s data hold; maxim um,
minimum a nd average rec ord m od e; r el ati ve mo de; tolerance
sorting mode; frequency and L/C/R selection.
The test data can be transferred to PC through an optional full
isolated optical RS232C interface and CP-09 software.
A tilt stand provides position flexibility for viewing and
operating the meter. The rubber over-molded case both
protects t he mete r in hars h envi ronments, and i mproves grip
in the han d. Whil e single 9V b attery opera tion is stand ard f or
the meter, a standard DC 12V power adaptor can also be
used as an optional power input.
Page 8
4
Front Panel Illustration
1. LCD display
2. Power ON/OFF button
3. RS232 selector
4. Dissipation factor and Quality factor selection button
5. Test frequency selection button
6. Inductance, Capacitance and Resistance function
selection button. Parallel and series mode selection
button
7. Tolerance mode selection button
8. Data hold, Maximum, Minimum and Average reading
selection butto n
9. Range selection button
10. Relative mode and Calibration selection button
11. DC 12V adaptor input
12. Input sockets and Terminals
Figure -1. Fr o nt pan el for LC R131.
Page 9
5
LCD Display Illustration
Figure 2. LCD Di s play.
1. AUTO: Auto-ranging indicator
2. LCR: L, C or R function indicator
3. MAX: Maxim um re adi n g indi ca to r
4. AVG: Average reading indicator
5. REL: Relative mode indicator
6. MIN: Minimum reading indicator
7. DH: Data hold indicator
9. Q: Quality factor indicator
10. D: Dissipation factor indicator
11.
: Secondary display
12.
: Beeper tone indicator for tolerance mode
13. %: Tolerance (percentage) indicator
14. deg: Phase Angle degree indicator (Model-A only )
15. kHz: Frequen cy indica tor
16. MAX AVG MIN: Recording mode indicators
17. TOL: Tolerance mode indicator
18. 1%5%10%: Tolerance sorting (percent) indicator
19.
: Auto power- off indicator
Page 10
6
20. : Low battery indicator
21. PAL: Parallel mode indicator
22. SER: Series mode indicator
23. Mk: Resistance (Ohm) indicator
24.
: Inductance (Henry) indicator
25.
: Capacitance (Farad) indicator
26.
: RS232 indicator
Special Indication Characters
: Indicates short connectors
: Indicates open con nec tor s
: Indicates calibration mo de
: Indicates damaged or open fuse
Page 11
7
How To Operate
Caution
When measuring within a circuit, the circuit must be
de-energized before connecting the test leads.
Instruments used in dusty or dirty environment should be
wiped and cleaned regularly.
Do not expose instrument to direct sunlight or other heat
sources for long peri ods .
E nsure the inst rument is di sconne cted fro m any circuit a nd
powered "OFF" before removing battery cover.
Note:
For achieving optimum precision for all L, C and R
measurements throughout all ranges, the instrument
should be internally calibrated before each use.
Page 12
8
Inductance Measureme nt
1. Press the "POWER" button to turn on the meter.
2. Press “L/C/R” button to select inductance measurement.
3. Insert an inductor into component receptacle socket or
connect the test clip to the component leads as required.
4. Press “FREQ” button to select testing frequency.
5. Press “D/Q” button to select Q factor for secondary
display.
6. Read the display readings for inductance value and quality
factor.
Figure-3. In d uctan ce Measuremen t.
Page 13
9
Capacitance Measureme nt
1. Press "POWER" button to turn on the met er.
2. Press “L/C/R” button to select capacitance measurement.
3. Insert a capacitor i nt o t he co mp on ent r ecep tacl e s ock et or
connect the test clip to the component leads as required.
4. Press “FREQ” button to select testing frequency.
5. Press “D/Q” button to select D factor for secondary
display.
6. Read the display readings for capacitance value and
dissipation factor.
Warning
To avoid electrical hazards, discharge all capacitors before
measuring.
Figure-4. Capacitance Measureme nt .
Page 14
10
Resistance Measurement
1. Press "POWER" button to turn on the met er.
2. Press “L/C/R” button to select Resistance measurement.
3. Insert a resistor into the component receptacle socket or
connect the test clip to the component leads as required.
4. Press “FREQ” button to select testing frequency.
5. Read the display readings for resistance value.
Figure-5. Resistance Measurement.
Page 15
11
Operating Instructions
Data Hold
This data hold function allows the operator to freeze the
displa y. To ente r this m ode, pr ess the " HOLD" pushb utton;
press again to release.
Sta tic Recording
Press the "REC" pushbutton for more than one second to
enter the static reco rdi n g mo de. The maximum and
minimum readings are then stored in memory, while a
beeping tone is produced when a new tested value has been
rec orde d. Push th e same but ton to cycle th roug h the curr ent
maximum, minimum and aver age readi ngs.
The MAX, MIN or AVG indicators on LCD will turn on to
indicate which value is shown.
To ex it this mo de, press an d hold the pushb utt on for mor e
than one second.
Notes:
1. Static recordi ng captur es only st able val ues and upd ates
the memory; it will not record any "OL" (overl oa d) val ue fo r
any of the L/C/R f unctions. In additi on, the meter will not
record values below 50 counts in Capacitance
measurement.
2. Static recording is only available in manual ranging;
however, activati on while in auto-r anging will automaticall y
set meter to ma nual r angi ng a nd caus e cali brati on p rompt s
to be displayed in the relevant ranges.
Dissipation Factor / Quality Factor
The "D/Q" value can b e displ aye d al t er nat ely by pressing the
"D/Q" button when the meter is set to Inductance or
Capacitance mode. It does not apply to resistance
measurement.
Page 16
12
Test Frequency
Default testing frequency is 1KHz. Push "FREQ" key to select
the desired test frequency.
L/C/R Function Selector
Press "L/C/R" pushbutton to select the desired L, C or R
function.
Relative
Press the "RE L" key t o e nter the r elativ e mode and st ore th e
display reading as a reference value. It will then dis play all
subsequent readings relative to the reference value. Press
"REL" button again to exit the relative mode.
Notes:
1. The relative mo de ca n not be activate d if the di s play value
is either "OL" or "0000".
2. Relative mode is only available in manual ranging;
however, activation while in auto-ranging will automatically
set the meter to manual ranging and cause calibration
prompts to be displayed in the relevant ranges.
3. The relative mode cannot be activated if the meter is set at
auto-ranging with data hold activated.
To leran ce
There are 1%, 5% and 10% tolerance range. To enter this
tolerance mode, insert the appropriate component as a
standard v alue into the socket or co nnect the component to
the test prob es, then press th e "TOL" pushbutto n to set this
value, as the standard reference tolerance. Similarly, any
value which appears on the LCD display, such as DH or
MAX/MIN/AVG, can be used as a standard value to sort
components. Press this button again to cycl e through 1%,
5% and 10% tolerance as required.
This functi on is designed for convenient c omponent sortin g.
An audible tone of “Be-Be-Be” will sound whenever the
component under test exceeds the setting tolerance.
Conversel y, a singl e ton e of “Be” indic ates the c ompone nt is
within the setting tolerance.
Page 17
13
Notes:
1. The t olerance mode can not be activated if the display is
either "OL" or "0000"; nor can it be activated where
capacitance value is below 10 counts.
2. Tolerance mode is only available in manual ranging;
however, activation while in auto-ranging will automatically
set the meter to manual ranging and cause calibration
prompts to be displayed in the relevant ranges.
3. The tolerance mode can’t be activated if the meter is set at
auto-ranging with data hold mode activated.
Auto / Manual Range
The auto-ranging mode is default status when the meter is
powered on. For specific measurement applications, press
"AUTO" button to set manual ranging. To return to the
auto-ranging mode, press and hold the "AUTO" button for
more than one second.
Automatic Fuse Detection
When the meter detects that the protective fuse has ruptured,
the "FUSE" character will appear and an internal beep will
sound continuously. In this situation, none of the function
keys can be operated and all other meter functions will be
inhibited. Fuse replacement is required.
Figure-6. F us e Dete ction
Parallel / Series Mode
The met er is cap able o f displa ying Pa rallel and Se ries mod e
data for all ranges. The parallel mode is default for
Capacitance and Resistance measurements, and the series
mode is default for Inductance measurement. Press "L/C/R"
button for more than 1 second to toggle "SER" and "PAL "
mode.
Page 18
14
Calibration
Calibration is avail able to all rang es. Si mply press and hol d
"CAL" button for more than one second to enter the
calibration mode and calibration prompts will be displayed.
Follow the prompts for open connector (
) or short
connector (
) connection and press the "CAL" button.
After calibration is completed, the meter will be restored to
normal display and ready for normal usage.
Figure-7. Ope n/ Short Cali br a tion
The function calibrates the meter’s internal parameters as
well as external connector influences for greater accuracy.
It is highly recommended to calibrate extremely high or low
ranges for L, C and R before making precision measurements.
Calibration prompts will be displayed automatically every time
those rang es are selec te d manu ally or by functi on (e. g. REL,
TOL, REC etc.), and calibration is recommended. Simply
follow the o pen connector (
) or short c onnector ( )
instruction an d then press the "CA L" b utton. You may skip
the calibration by pressing the "D/Q" button.
Notes:
1. Changing measurement frequencies is handled in the
same way as selecting a di ffer ent hardw are r an ge, a nd s o
automatic calibration prompts will be displayed in the
recommended ranges.
2. Be sure to use the same testing position after short
calibration.
Page 19
15
Auto Power Off/ Disable Auto Power Off
When the met er has not b een used f or five mi nutes after t he
last operation, a long "beep" tone will sound. The meter will
then automatically e nter a "slee p" mode and th ere will be n o
display on the LCD. T o reactivate the meter, simply press any
pushbutton.
When the meter is to be used for long period, the auto
power-off can be disabled by pressing and holding "L/C/R"
button while turning meter ON. Release the button, then
press any button. The
symbol will disappear to confirm
that the auto power off has been disabled.
When us in g a 12 V DC al ter n at e po w er sou rc e , au t o po wer off
is disabled automatically.
Note: It is recommended that the meter shou ld always be
switched off when not in use.
Low Battery Indication
When the "
" symbol flashes on the display, the battery
voltage is below normal working voltage and is weakening.
Replace battery with a new one to maintain accuracy of the meter.
Communication
The meter is provided with communication capability by using
the option al CP-09 RS232 package, with full optical isolat ed
cable and software.
Refer to the following procedures to set up communication
between your meter and personal computer.
1. Fix one side of cable to the meter, with the text-side facing
up. Connect the 9-pin terminal of cable to RS232
communicati on port 1 or 2 of person al comput er. See the
Figure-8.
2. Press "RS232" button to enable interface.
Symbol “
” is enabled on the display.
3. Operate the software to record data for your application.
4. Ensure the side-catches on the cable connector are
disengaged prior to removing the cable.
Page 20
16
Figure -8. Cable Connec tion Of Comm uni cation
Tex t side
facing up.
Page 21
17
General Specification
LCR131
Parameters Measured L/C/R/D/Q
Measuring Circuit Mode
Inductance (L)
–Defaults to series mode
Capacitance/ Resistance (C/R)
-Defaults to parallel mode
Displays L/C/R: Maximum display 19999
D/Q: Maximum display 999 (Auto Range).
Ranging Mode Auto & Manual
Measuring Terminals 3 terminals with sockets
Test Frequency
Accuracy:
±0.1 %
120Hz= 120 Hz
1KHz =1010 Hz
Tolerance mode 1%, 5%, 10%
Test Signal Level 0.6Vrms approx.
Measuring Rate 1 time/second, nominal
Response time
Approx. 1 second/ DUT (device under
test)(@ manual range)
Auto Power-Off 5 minutes approx. without operation
Temperature Coefficient
0.15 x (Specified Accuracy) / (0-18 or
28-40 )
Operation Temperature
0 to 40 ; 0-70% R.H.
Storage Temperature
-20 to +50 ; 0-80% R.H.
Low Battery Indication
Approx. 6.8V
Power Consumption
Approx. 40mA for operation/ 0.08mA after
Auto Power-off.
Power Requirements
1) DC 9V Battery
2) Ext. DC Adaptor: DC 12Vmin –15Vmax.
(Load 50mA Min.)
Protective Fuse 0.1A/250V Fuse (input protective)
Standard Accessories Test alligator clips (pair)
DC 9V Battery.
User manual
Optional Accessories Carrying case
RS232 package
SMD Tweezers
DC Adaptor (EA112: AC120V) / (EA55:
AC220V).
Dimensions (L/W/H) 184/ 87/ 41 mm
Weight 330 grams
Page 22
18
Electrical Specification
Accuracy is expressed as: ± (% of reading + no. of least significant
digits) at 23 ±5 and <75% R.H.
Resistance (parallel mode)
Test Frequency: 120Hz / 1KHz
Accuracy
Range
Maximum
Display
@120 Hz @1KHz
Specified Note
10M 9.999M
2.0%+8 *3 2.0%+8
*3
After open cal.
2000K
1999.9K
0.5%+5 0.5%+5 After open cal.
200K 199.99K
0.5%+3 0.5%+3 -
20K 19.999K
0.5%+3 0.5%+3 -
2000 1999.9
0.5%+3 0.5%+3 -
200 199.99
0.8%+5 0.8%+5 After short cal.
20 19.999
1.2%+40 1.2%+40 After short cal.
Notes:
1. This specification is based on measurements performed at the test
socket.
2. DUT (Device Under Test) & Test leads should be properly shielded
to GUARD if necessary.
3. This specification is based on battery operation.
Capacitance (parallel mode)
Test F requency: 120 Hz
Accuracy Range Maximum
Display
Capacitance
DF
Spec. Note
10mF 19.99mF
*5
3.0%+5
(DF<0.1)
10%+100/Cx+5
(DF<0.1)
After short
cal.
1000μF 1999.9μF
*6
1.0%+5
(DF<0.1)
2%+100/Cx+5
(DF<0.1)
After short
cal.
200μF 199.99μF
0.7%+3
DF<0.5
0.7%+100/Cx+5
(DF<0.5)
-
20μF 19.999μF
0.7%+3
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
-
2000nF 1999.9nF 0.7%+3
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
-
200nF 199.99nF 0.7%+5
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
After open
cal.
20nF 19.999nF 1.0%+5
(DF<0.1)
2%+100/Cx+5
(DF<0.1)
After open
cal.
Page 23
19
Test Frequency: 1 KHz
Accuracy
Range
Maximum
Display
Capacitance
DF
Spec. Note
1mF 1.999mF
*5
3.0%+5
(DF<0.1)
10%+100/Cx+5
(DF<0.1)
After short
cal.
200μF 199.99μF
1.0%+5
(DF<0.1)
2.0%+100/Cx+5
(DF<0.1)
After short
cal.
20μF 19.999μF
0.7%+3
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
-
2000nF 1999.9nF 0.7%+3
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
-
200nF 199.99nF 0.7%+3
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
-
20nF 19.999nF 0.7%+5
(DF<0.5)
0.7%+100/Cx+5
(DF<0.5)
After open
cal.
2000pF 1999.9pF 1.0%+5
(DF<0.1)
2.0%+100/Cx+5
(DF<0.1)
After open
cal.
Notes:
1. Q Value is the reciprocal of DF.
2. This specification is based on measurements performed at
the test socket.
3. DUT & Test leads s hould b e properl y shield ed to GUAR D
if necessary.
4. Cx=Counts of di splayed C value, e. g. if C=88.88μF, then
Cx=8888.
5. This reading can be extended to 1999 MAX display with
accuracy not specified.
6. This reading can be extended t o 19999 MAX display wit h
accuracy not specified.
Page 24
20
Inductance (Series mode)
Test Frequency: 120Hz
Accuracy (DF<0.5)
Range
Maximum
Display
Inductance DF
Spec. Note
1000H 999.9H 1.0%+(Lx
/10000) %+5
2%+100/Lx+5 After open
cal.
200H 199.99H 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
20H 19.999H 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
2000m 1999.9mH 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
200mH 199.99mH 1.0%+(Lx
/10000)%+5
3%+100/Lx+5 After short
cal.
20mH 19.999mH 2.0%+(Lx
/10000)%+5
10%+100/Lx+5 After short
cal.
Test Frequency: 1 KHz
Accuracy (DF<0.5)
Range
Maximum
Display
Inductance DF
Spec. Note
100H 99.99H 1.0%+(Lx
/10000) %+5
2.0%+100/Lx+5 After open
cal.
20H 19.999H 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
2000mH 1999.9mH 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
200mH 199.99mH 0.7%+(Lx
/10000)%+5
1.2%+100/Lx+5
-
20mH 19.999mH 1.0%+(Lx
/10000)%+5
3.0%+100/Lx+5 After short
cal.
2000μH 1999.9μH
2.0%+
(Lx/10000)%+5
10%+100/Lx+5 After short
cal.
Notes:
1. Q Value is the reciprocal of DF.
2. This specification is based on measurements performed at
the test socket.
3. DUT & Test leads shall be properly shi elded to GUARD if
necessary.
4. Lx=counts of displayed L value, e.g. if L=88.88H, then
Lx=8888.
Page 25
21
MAINTENANCE
WARNING
To avoid ele ctr ic al sh oc k, do not perform any ser vici n g
unless you are qualified to do so.
SERVICE
If the instrument fails to operate, check battery and test leads,
and replac e as n ec essa ry. If the instrumen t still d oes n’t wo rk ,
confirm operating procedure as described in this User Manual.
Use specified replacement parts only. The meter must be
completely turned off while replacing either fuse or battery.
Battery Replacement
The meter is powered using a single 9V battery, NEDA1604,
JIS006P, IEC6F22 carbon-zinc or alkaline battery. Replace
battery if the low battery sign (
) is displayed and flashing.
Use the following procedure to replace the battery:
1. Loosen screws wit h suitable screwdriver and remove
battery cover as Figure-9.
2. Replace the used battery with a new battery of the
correct type.
Figure-9. Bat ter y Replacement.
Page 26
22
Fuse Replacement
The met er can self- detect if its input pr otective fus e is eithe r
ruptured or damaged. In this case , the LCD will display th e
symbol "FUS E" a nd an a udible beep wi l l sou nd co nti n uo usly,
warning the user to replace the damaged fuse. While
replacing the fuse, the power must be completely shut off.
1. Loosen screws with suitable screwdriver and remove
battery cover as Figure-9.
2. Loosen screws with suitable screwdriver and remove
bottom cover as Figure-10.
3. Replace the damaged fuse with an equivalent of the
correct specification.
Figure-1 0. Fu se R ep la cem e nt
Page 27
23
Cleaning the Meter
WARNING
To avoid ele ctr ic al sh oc k or dam ag e to th e me ter, never
allow water to access the inside of the case.
Before cleaning this meter, make sure the power is
switched to OFF, and remove external DC adaptor. To
clean the meter, wipe the dirt away with gauze or soft
cloth soaked with diluted neutral detergent. Do not
saturate, and prevent detergent from penetrating inside
case so causing damage. After cleaning, make sure the
instrument is dried completely before use.
Specified Accessories
Description
User Manual
5x20mm 0.1A/250VAC slow blow fuse
CP-09 PC Download Software
Page 28
M
Megger Limited
Archcliffe Road
Dover
Kent CT17 9EN T: +44 (0) 1304 502100
England F: +44 (0) 1304 207342
Megger
4271 Bronze Way
Dallas T: +1 (800) 723-2861 (U.S.A. only)
TX 75237-1017 T: +1 (214) 330-3203
(International) F: +1 (214) 337-3038
U.S.A.
Megger
PO Box 9007
Valley Forge
PA 19484-9007 T: +1 (610) 676-8500
U.S.A. F: +1 (610) 676-8610
Megger SARL
Z.A. Du Buisson de la Couldre
23 rue Eugène Henaff
78190 TRAPPES France T +33 (1) 30.16.08.90
F +33 (1) 34.61.23.77
This instrument is manufactured in the United Kingdom.
The company reserves the right to change the specification
or design without prior notice.
Megger is a registered trademark
Part No LCR131_UG_V02 0205
www.megger.com
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