Megger LCR131 User manual

M
LCR131
Dual display meter
User Manual

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
0to 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 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

i
LCR131 COMPONENT TESTER
USER MANUAL

ii
Table 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

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 missing, contact 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 using the meter, read the following safety information
carefully. In this manual, "WARNING", is reserved for
conditions and actions that pose hazard(s) to the user;
"CAUTION", is reserved for conditions and actions that may
damage your meter.

2

SAFETY INFORMATION
To ensure that you use this device safely, follow the
safety guidelines listed below:
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 battery. It is also possible to use external power using
a 12V DC adaptor conforming to IEC 60950.

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 testing frequencies. It is possible to select between
auto and manual ranging.
Front panel pushbuttons maximize the convenience of
function and feature selection such as data hold; maximum,
minimum and average record mode; relative mode; 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 the meter in harsh environments, and improves grip
in the hand. While single 9V battery operation is standard for
the meter, a standard DC 12V power adaptor can also be
used as an optional power input.

4
Front Panel Illustration
1. LCD display
2. PowerON/OFFbutton
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 button
9. Range selection button
10. Relative mode and Calibration selection button
11. DC 12V adaptor input
12. Input sockets and Terminals
Figure-1. Front panel for LCR131.

5
LCD Display Illustration
Figure 2. LCD Display.
1. AUTO: Auto-ranging indicator
2. LCR: L, C or R function indicator
3. MAX: Maximum reading indicator
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: Frequency indicator
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

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 connectors
: Indicates calibration mode
: Indicates damaged or open fuse