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TABLE OF CONTENTS

SAFETY PRECAUTIONS .............	Inside Front Cover
SIMPLIFIED OPERATIONS ........................................		4
DESCRIPTION
Introduction .........................................................		6
Features.....................................................................		6
Specifications ..............................................................		6
Controls ................. ................ ............	-......................	8
Rear Panei Features.................	.............................	10
Supplied Accessories......................................	..	10a
Optional Accessories............................................		10b
OPERATION
Introduction ......................................	......................	12
AC Power Operation ........................................		.. 12
Battery Operation.....................................................		12
Battery Test .......................... ...............................		13
Recharging the B a tte ry ............................		14
Auto O ff ........................... .................................		- 14
STOP TESTING Indication .......................................		14
Test Leads...................................................		14
Test Lead Mounting C lip ....................................		15
Test Lead Adapter..............................................		15
Test Lead F u s e ...................................................		15
Lead Z eroing .......................................................		16
Entering Component Data .......................................		16
Error C odes.......................................................		18
Capacitor Testing ................................	..................	.. 19
Capacitance Measurement Accuracy . . . . .		. . . . 19
Measuring Small Capacitance Values in
Noisy Environments ..................................		20
Capacitor Parameter Testing..................................		20
Measuring Capacitor V a lu e ...............................		20
Measuring Capacitor Dielectric Absorption		. . . . 20
Measuring Capacitor Leakage (Microamps)		. . . 21
Paper, Mica and Film C apacitor...................		22
Ceramic Capacitors........................................		22
Aluminum Electrolytics ..................................		22
Tantalum Electrolytics .............	......................	22
Non-polarized Electrolytics ...........................		22
Leakage Charts ..................................................		22
Aluminum Electrolytics ..................................		23
Tantalum Electrolytics -. ..................................		24
Measuring Capacitor Leakage (ohms) .............		24
Measuring Capacitor E S R ..................................		25
Capacitor Automatic GOOD/BAD Testing.............		26
Inductor Testing.........................	.............................	29
Balancing Out Lead Inductance .......................		29
Inductor Value Testing ......................................		30
Inductor Automatic GOOD/BAD Testing ........		.. 30
Checking Inductors with the Ringer Test ........		30
GOOD/BAD Inductor Value Testing...................		31

IEEE 488 BUSS OPERATION
Connecting the LC102 for IEEE Operation.............	31
Sending Data to the LC 102 ....................... ............	32
Component Type Commands............................	33
Value Multipliers ........ .........................	33
Test Function Commands ..................................	34
General Commands ...........................................	35
Reading Data from the LC102..................... ..........	35
Data Form at................... ......................................	36
Separating Data Fields ......................... ............	36
Advanced Programming Ideas ..............................	37
Error Testing ......................................................	37
GOOD/BAD Results............................................	37
Shorted Capacitors .............................................	38
Open Inductors ...................................................	38
Making Leakage Tests with IE E E .....................	38
Making ESR Tests with IE E E ............................	38
Programming Examples..........................................	39
Sending Listener Codes ....................................	39
Sending Talker C odes........................................	39
Sample Programs ..............................................	40
APPLICATIONS
Introduction .............................................................	44
Indentifying Capacitor T yp es ..................................	44
Aluminum Electrolytics ........ .............................	45
Tantalum Electrolytics........................................	45
Double Layer Electrolytics..................................	46
Ceramic Capacitors............................................	46
AH Other Capacitors ...................	47
Identifying Inductor Types .....................................	47
Yokes and Flybacks ..........................................	47
Switching Transformers......................................	47
Coils ......................................................................	48
Identify Unknown Components..............................	48
Capacitor Testing Applications ..............................	49
Interpreting Capacitor Value R eadings............	49
Dielectric Stress............................... ..................	49
Checking Leakage in Multi-Section Lytics	. . . . 49
Intermittent Capacitors ......................................	50
Checking Ceramic Temperature
Characteristics...................................................	50
Checking Capacitance of Silicon Diodes
and Transistors ................................................	50
Testing High Voltage Diodes..............................	51
Reforming Electrolytics ......................................	51
Inductor Testing Applications..................................	52
Testing Inductors In-Circuit................................	52
Mutual Inductance ...............................................	52
Ringing Peaking C o ils .......... .............................	52
Ringing Metal Shielded Coils .........................	.. 53
Ringing Flyback Transformers ..........................	53
Ringing Deflection Yokes ..................................	54
Note on Solid State Yokes & Flybacks.............	55

2

Cable Testing Applications ....................................	55
Testing Coaxial C abie ........................................	55
Determining the Distance to O p e n ...............	55
Locating a Short in Coaxial Cable ...............	56
Determining Capacitance & Inductance
per foot .........................................................	57
Using the LC102 to Find Aging Cable .........	57
Hi Potential T esting .................................................	57
Measuring Resistor to 1 Gigohm ............................	58
Applications of the Leakage Power Supply..........	58
MAINTENANCE
Introduction .............................................................	59
Recalibration and Service .......................................	59
Circuit Description and Calibration Procedures . .	. 59
Replacement Leads.................................................	59
“Spare” B utto n .......... ..............................................	59
Test Lead Fuse ......................................................	59
Fuse Replacement....................... ...........................	59
Display T e s t.......................................... ..................	59
APPENDIX
Capacitor Theory and the A U T O -Z .....................	, 60
Capacitor Types...................................... ................	61
Ceramics .............................................................	61
Aluminum Electrolytics .......................... ............	62
Tantalum Electrolytics ..................... ...................	62
A Capacitor is more than a Capacitor.............	63
Leakage......................... .............................	63
Dielectric Absorption..........................................	63
Effective Series Resistance........... ....................	64
Value Change ..................... ...............................	64

3

SIMPLIFIED OPERATIONS

Capacitor Parameter Tests

7.	Read VALUE of capacitor 9.	Read % of	13.	Read LEAKAGE in
	in pF, uF, or F on display	D/A on display	/	uA or mA on display
				15. Read ESR in
				ohms on display
				•6. Push button
				-12.	Push button
				*8.	Push button
				14.	Push button
1.	Open test leads			10. Enter rated voltage
				of capacitor
3.	Short test leads
				11. Select CURRENT position
		2.
				Momentarily hoi
5.	Connect capacitor to test leads switch to OPEN
		position		4. Momentarily hold switch
				to SHORT position
Inductor Parameter Tests
	5. Read VALUE of inductor in		8. Read Inductor Ringer test on display
	uH, mH or H on display		Reading of 10 or more indicates good component

		4.	Push button
6.	Select Inductor type	7.	Push button
1.	Sh5rt test leads
3.	Connect inductor	!. Momentarily hold switch to
		SHORT position

4

DESCRIPTION

Introduction

Γ -msritnr and inductor usage is extensive, encompas­ sing a T L T ts of industrial and consumer electronics. Very f L c?rcu.ts lack either of these components. As the tnnsistor gave way to the IC, and the IC gave way tn tho I STC so capacitor and inductor usage continues o in c re a s e rapidly since neither of these components can be physically incorporated into ICs on a broad basis. ThmiiA thev have changed some m physical size, canacftors still perform the same basic functions. But

• ? A * .vniits more than ever before, the tolerances

andparameters of capacitors and inductors are critical to proper circuit operation.

Automatic lead zeroing balances out test lead capaci­ tance, resistance, and inductance for accurate readings on small capacitors and in d u c to rs . The LC102 is pro­ tected from external voltages applied to the test leads by a fuse in the TEST LEAD JACK and a special stop

testing circuitry which locks out all test buttons when voltage is sensed on the test leads.

__r.vw.y pUl'La- uu-ιυι;ation troubleshooting in all types ofservic­

ing from industrial equipment to avionics to cable fault locating. An optional SCR250 SCR & TRIAC TEST ACCESSORY extends the LC102 test capabilities to provide a fast, accurate test of these components. The LC1G2 may be interfaced into any computer interface

system for fully automatic, computer controlled testing in a laboratory or incoming inspection area.

The Sencore LC102 AUTO-Z takes the guesswork out

r		inductor testing. It provides automatic
S	k	valne, leakage, ESE, and a patented
e,ts ο _	p	, -	Inductors are automatically

anafy ed fbrv a T u e a*d quality with patented tests. The

T Pino			io o PomOlete, automatic, mieroprocessor-con-
,	n	j	c	-+nr and inductor analyzer. Its features
"	,	Γ	ΰ	suited‘	for both single component

analyzing in service or maintenance work or for large volume, batch testing in a lab or incoming inspection.

SPECIFICATIONS

DIGITAL READOUT

TYPE: ,45”, 6 digit, 7 segment LCD

READINGS: Fully autoranged with auto decimal placement. One or two place holding zeros added as

needed to provide standard value readouts of pF, uF, F, uH or mH.

ANNUNCIATORS: pF, uF, F, uH, mH, H, uA, mA, %,

V, kft, Mft, a, RINGS, SHORT, OPEN, WAIT, GOOD, BAD

Features

Qc,„rr,yp LC102 AUTO-Z is a dynamic, portable, automatic capacitor and inductor tester. It is designed to auicklv identify defective components by simply con-

+· X „sm»ritor or inductor to the test leads and pushi^ a tesf button. The test result is readily dis-

β T fn readout in common terms. All S a ecto rnand inductor test results may also be disDlaved as GOOD/BAD compared to standards adopted bv the Electronic Industries· Association (EIA). User

defined Hmits may also be programmed into the LC102 for the GOOD/BAD comparison.

In addition to

ΆU	1	J& Μa	"	upt t0T	TOlts;ESR
			natented	test, and	an automatic,
checked wi			, capacitor dielectric absorption. A

patented inductance vaj;Ue test provides a fast, accurate g

test of true >fduc‘^witchmg powerLpply transfer­
ees, deflect onyoke	^	fes

mers, and other non

reliable GOOD/BAD quahtv test.

CAPACITORS (Out of circuit)

CAPACITOR VALUE

Dynamic test of capacity value is determined by

measuring one RC time constant as capacitor is charged to +5 V through:

1,5 Megohms for 0 - .002 uF 15 K ilo h m s for .002 uF - 2 uF

Values above 2 uF are charged with a constant current of:

60 mA for 2uF - 2000uF

416 mA for 2000 uF - 19.99 F

Maximum voltage across capacitors larger than 2 uF limited to 1.75 V.

ACCURACY: +/—1% +/ —lpF 47-1 digit for values

to 1990 uF. + / —5% +/-.1% of range full scale for values 2000uF to 19.99 F.

RESOLUTION AND RANGES: 1.0 pF to 19.99 F, fully
autoranged
.1pF	1.0pF to	199.9pF
lp F	200pF to	1999pF
.00001 uF	0.00200uF to	0.01999 uF
.0001 uF	0.0200uF to	0.1999 uF

0.10 uH to

20.0 uH to

200 uH to

1.000 mH to

19.99 uH

199.9 uH

999 uH

1.999 mH

.001 uF	0.200 uF to	1.999 uF
.01 uF	2.00 uFto	19.99 uF
.luF	20.0 uF to	199.9 uF
luF	200 uF to	1,999 uF
10uF	2,000 uF to	19,990 uF
100uF	20,000 uF to	199,900 uF
.001F	0.200 F to	1.999 F
.01F	2.00 F to	19.99 F

CAPACITOR LEAKAGE

READOUT.: User selectable between leakage current and resistance

ACCURACY: +/-5% +/-1- digit

APPLIED VOLTAGE: Keyboard entry; 1.0 to 999.9 volts in .1 volt steps; accuracy + 0 - 5%. Short circuit current limited to 900mA, power limited to 6 watts.

RESOLUTION AND RANGES: .OluA to 20 mA, fully

autoranged
.OluA	0.01 uA to	19.99 uA
.luA	20.0 uA to	199.9 uA
1 uA	200uAto	1999 uA
.01mA	2.00 mA to	19.99 mA

CAPACITOR ESR (Test patented)

ACCURACY: +/-5% +/-1 digit

CAPACITOR RANGE: 1 uF to 19.99 F

RESOLUTION	AND RANGES:	.10 ohm to 2000
ohms, fully autoranged
.01 ohm	O.lOohmsto	1.99-ohms
.lohm	2.0ohms to	19.9 ohms
1 ohm	20 ohmsto	1999 ohms

CAPACITOR D/A (U.S. Patent #4,267,503)

ACCURACY: +/ - 5%of reading + /— 1 count RANGE: 1 to 100%

CAPACITOR RANGE: .01 uF to 19.99 F

INDUCTORS (In or out of circuit)

INDUCTANCE VALUE

(U.S. Patent #4,258,315)

A dynamic test of value determined by measuring the EMF produced when a changing current is applied to the coil under test.

CURRENT RATES: automatically selected

50 mA/uSec	OuH to	18 uH
5mA/uSec	18uH to	180 uH
.5mA/uSec	180uH to	1.8mH
50 mA/mSec	1.8 mH to	18mH
5 mA/mSec	18mH to	180mH
.5mA/mSec	180mHto	1.8 H
05 mA/mSec	1.8 Hto	19.99 H

ACCURACY: +/-2% + / - 1 digit

RESOLUTION AND RANGES: .10 uH to 20 H, fully autoranged

.01 uH

.1 uH luH

.001 mH

01 mH	2.00 mH to	19.99mH
.1 mH	20.0 mH to	199.9 mH
Im H	200 mH to	999mH
.001H	1.000 Hto	1.999 H
.01H	2.00 Hto	19.99 H

RINGING TEST

(U.S. Patent #3,990,002)

A dynamic test of inductor quality determined by apply­ ing an exciting pulse to the inductor and counting the number of cycles the inductor rings before reaching a preset damping point.

INDUCTOR RANGE: 10uH and larger, non-iron core ACCURACY: -f /— 1 count on readings between 8 and 13 Rings

RESOLUTION: + / - 1 count

EXCITING PULSE: 5 volts peak; 60 Hz rate

GENERAL

TEMPERATURE: operating range: 32° to 104CF (0° to 4G°C) range for specified accuracy (after 10 minute warmup): 50° to 86°F (10° to 30°C)

POWER: 105-130V AC, 60Hz, 24 watts with supplied PA251 power adapter. Battery operation with op­ tional BY234 rechargeable battery. 210-230V AC op­ eration with optional PA252 Power Adapter.

AUTO OFF: Removes power during battery operation if unit sits idle longer than 15-20 minutes.

BATTERY LIFE: 8 hours typical inductor testing; 7 hours typical capacitor testing.

SIZE: 6” x 9" x 11.5” (15.2cm x 22.9 x 29.1cm) HWD WEIGHT: 6 lbs. (2.7kg) without battery, 7.6 lbs (3.4kg)

with battery

GOOD/BAD INDICATION: Functions on all tests. Re­ quires user input of component type and value, or input of desired limits.

IEEE: Requires the use of Sencore IB72 Bus Interface Accessory.

The following interface codes apply: SHI, AH1, T8, L4, SRO, RLO, PPO, DCO, DTC, CO. All readings are test accuracy +/— 1 count.

Specifications subject to change without notice

ACCESSORIES

SUPPLIED:

39G219 Test Leads

39G144 Test Lead Adapter

39G201 Test Button Hold Down Rod

64G37 Test Lead Mounting Clip

PA251 AC Power Adapter/Recharger

OPTIONAL:

39G85 Touch Test Probe

FC221 Field Calibrator

BY234 Rechargeable Lead Acid Battery

SCR250 SCR/Triac Test Accessory

CC254 Carrying Case

CH255 Component Holder

CH256 Chip Component Test Lead

IB72 Bus Interface Accessory

PA252 220V AC Power Adapter/Recharger

7

Controls

1. COMPONENT TYPE select buttons. Use with TEST buttons (4), and COMPONENT PARAMETERS buttons (6) for component limit testing.

a.- e. capacitor type buttons - Use with other beige color coded capacitor buttons (4a - d) and (6m -o).

f.SPARE - Provides a spare button to allow for future component types and internal memory up­ dates.

g.- i. Inductor type buttons - Use with other blue color coded inductor buttons (4e - f) and (6s - u).

2.LCD D ISPLAY

2a. SHORT - Indicates that test leads, or component connected to test leads, are shorted when LEAD ZERO OPEN button (9a) or CAPACITOR VALUE TEST button (4a) is pushed.

2b. OPEN - Indicates that test leads, or component connected to test leads, are open when LEAD ZERO SHORT button (9b) or INDUCTOR VALUE TEST button (4e) is pushed.

2c. W AIT - Indicates internal circuits are discharg­ ing after CAPACITOR LEAKAGE TEST button (4c) is released. Also indicates external voltage on test leads. All tests are locked out while WAIT indicator is on.

2d. DIGITAL READOUT - Indicates value of test result. Last two digits are place holders and indi­ cate 0 on large readings. Displays error message if error condition exists.

2e. READING ANNUNCIATORS - Automatically light to qualify the reading displayed in the DIGI­ TAL READOUT (2d).

2f. GOOD - Indicates that component meets pre-de- flned tolerances for the test selected by TEST but­ ton (4).

2g. BAD - Indicates that the component does not meet the pre-defmed tolerances for the test selected by TEST button (4).

3.APPLIE D VOLTAGE LCD D IS PLA Y - Displays the amount of leakage voltage to be applied to the TEST LEAD (10) when the CAPACITOR LEAKAGE button (4b) is pressed. Voltage is selected using COMPONENT PARAMETERS keypad (6a-l & 6r).

4.TEST buttons

a.CAPACITOR VALUE - Depress to test capacitor value.

b.DIELECTRIC ABSORP - Depress to read per­ centage of dielectric absorption.

c.CAPACITOR LEAKAGE - Depress to test capacitor leakage after the capacitor working vol­ tage is entered with the COMPONENT PARAMETERS keypad (6).

d.CAPACITOR ESR - Depress to test capacitor ESR.

e.INDUCTOR VALUE - Depress to test inductor value.

f.INDUCTOR RINGER - Depress for ringing (qual­ ity) test on coils, yokes/flybacks and switching transformers after selecting inductor type with COMPONENT TYPE switches (lg-i).

5A. CAUTION INDICATOR LED - Blinks as a warn­ ing when leakage voltage is set to 25 volts or higher, as indicated on APPLIED VOLTAGE LCD DISPLAY

(3). Voltage is only present at test leads when CAPACITOR LEAKAGE test button (4c) is depressed.

5B. PROTECTION CIRCUIT OR FUSE OPEN A LA R M - A flashing LED along with an audible alarm will activate when either the test lead input fuse opens or the protection circuit senses 10 volts or greater.

6. COMPONENT PARAM ETERS keypad - Use to enter parameters for limit testing..

a~k. NUMERIC IN PU T - Use to enter numerical value portion of parameters. Use with COMPO­ NENT PARAMETERS buttons (m-u).

1.C LR - Push once to clear NUMERIC INPUT entry. Push twice to clear all parameters and COMPO­

NENT TYPE switches (1).

m-o. CAPACITO R VALUE M U LTIPLIE R - Use after NUMERIC INPUT entry (6a-k) to enter capacitor value. Push to recall entered value.

p-q. PERCENTAGE buttons - Use after NUMERIC INPUT entry (6a-k) to enter compo­ nent tolerance. Push to recall entered value.

r.VOLTS - Use with NUMERIC INPUT (6a-k) to select desired test voltage for capacitor leakage

tests.

s-u. INDUCTOR VALUE M U LTIPLIE R - Use after NUMERIC INPUT entry (6a-k) to enter in­ ductor value. Push to recall entered value.

7. P U L L CHART - Provides simplified operating in­ structions and quick reference tables.

S.LEAKAG E Switch

a. CURRENT - Selects readout of leakage current in uA or mA when CAPACITOR LEAKAGE but­ ton (4c) is depressed.

fo. OHMS - Selects readout of leakage in ohms when CAPACITOR LEAKAGE button (4c) is depressed.

9.LEAD ZERO Switch

a.OPEN - Use with CAPACITOR VALUE button (4a) and open test leads to balance out test lead capacitance.

b.SHORT - Use with INDUCTOR VALUE button (4e) and shorted test leads to balance out test lead inductance.

10.TEST LEAD INPU T JACK - Provides a connec­ tion for attaching supplied test leads (17) or optional CHIP COMPONENT TEST LEADS (30). Unscrew jack for access to protection fuse.

11.POW ER Switch

a.OFF - Removes power from all circuits.

b.AUTO OFF - Provides power for approximately 15 minutes after auto off circuitry is reset. Auto off is bypassed when LC102 is powered from the AC Power Adapter.

c.ON & B ATT TEST - Turn unit on and reset auto off circuitry. Remaining battery life is displayed in LCD DISPLAY (2d).

8

COMPONENT TYPE	COMPONENT PARAMETERS		TEST
	N U M E fi iC IN P U T	g N T S R ! R E C A L L

pSINGE

POWER	TEST LEAD	LEAD ZERO	LEAKAGE
O N S A
B A T T T ES T	B
A U T O O f f ·
OFF C

/^ W A R N I N G : Flashing tight indicates 25-1000V applied to test leads when leakage button is pressed.

TOP TESTING: Protection circuit or fuse is Capacitor being tested may be charged.

! 1S V A C Q f l B A ?1

Nos.· 3S9 « 0 0 2 . . ' « s e a t s . « 6 7M 3 . O r i w n Pffndiny

Fig. 1— Location of frontpanel·controls and features.

		2d	2e	2f
2c\	'WAIT	4 ' O Q O Ο Ο O S p r n H m A K f t G O O D -
2b— •OPEN
2 a -	SHORT	L I.O .L I.L I.U .U . RINGS V% Ω		BAD------29

Fig. 2 — LCD annunciators.

3

R ear Fane! F eatu res

12.B ATTERY COM PARTM ENT COVER - Provides access to the (optional) BY242 rechargeable battery.

13.INTERFACE ACCESSORY JACK - Allows the (optional) IB72 IEEE 488 Bus Interface Accessory (26) to be connected to feed LC102 readings to an automated measuring system.

14.TEST BUTTON HOLD DOWN ROD HOLDER

-Holds TEST BUTTON HOLD DOWN ROD (19) when not in use.

15.39G144 TEST LEAD AD APTE R MOUNTING CLIP.

16.POWER IN PU T - Connects to supplied PA251 POWER ADAPTER (21) for 110V AC operation, or to PA252 for 220V AC operation (not pictured).

Fig. 3 — Location of rear panel features.

Supplied Accessories

17.TEST LEADS (39G219) - Special low capacity cable with E-Z Hook® clips. Connect to TEST LEAD INPUT (10).

18.39G144 TEST LEAD AD A PTE R (39G144) - Use to adapt TEST LEADS (17) to large, screw terminal capacitors.

19.TEST BUTTON HOLD DOWN ROD (39G201) - Use to hold CAPACITOR LEAKAGE button (4a) depre­ ssed when reforming capacitors.

20.TEST LEAD MOUNTING C LIP (64G37) - Use to hold Test Lead when not in use.

21.POWER AD APTER (PA251) - Plugs into POWER INPUT (16) to power unit from 105-130 VAC line. Also recharges the (optional) BY234 Battery when installed inside the LC102.

Fig. 4 — Supplied Accessories.

Optional Accessories

22.39G85 TOUCH TEST PROBE - Use for in-circuit testing of coils and inductors from P.C. board.

23.FIELD CALIBRATOR (FC2 2 1 ) - Use to periodi­ cally check calibration of the LC1 0 2 .

24.RECHARGEABLE B A TTE R Y (BY234) - Pro­ vides portable operation for the LC102. One battery required.

25.SCR/TRIAC TEST ACCESSORY (SCR250) -Use for testing SCRs and Triacs.

26.IEEE 488 BUS INTERFACE ACCESSORY - Connects between the INTERFACE ACCESSORY JACK (13) and the IEEE 488 port of a Bus controller

to allow the LC77 to be used in automated test setups.

E-Z Hook® is a registered trademark of Tele Tek Inc.

27.C ARRYING CASE (CC254)- Provides protection and easy carrying for the LC102 and its accessories.

28.COMPONENT HOLDER (CH255)-Use to hold components for fast tests when doing,volume testing.

29.C H IP COMPONENT TEST LEAD (CC256)- Special shielded test leads for testing small surface mount (Chip) components.

Fig. 5 — Optional Accessories.

OPERATION

Introduction

Before you begin to use your LC102 AUTO-Z, take a few minutes to read through the Operations and Appli­ cations sections of this manual and acquaint yourself with the features and capabilities of your instrument. After you have familiarized yourself with the general operation of the LC102, most tests can be performed with the information on the front panel.

AC Power Operation

For continuous bench operation the LC1 0 2 is powered from any standard 105-130V (50-60 Hz) AC line using the PA251 Power Adapter. When 220V AC operation is required, power the LC102 with the optional PA252 220 VAC Power Adapter. Connect the Power Adapter to the POWER IN JACK located on the rear of the LC102, as shown in Figure 6 .

The power adapter serves as a battery charger to re­ charge the (optional) BY234 battery when it is installed in the unit. The BY234 may be left installed in the LC102 at all times without danger of over charging. Connecting the Power Adapter bypasses the auto-off circuitry in the LC1 0 2 and allows continuous, uninter­ rupted operation.

--------------------WARNING--------------------

Using an AC adapter other than the PA251 or PA252 may cause damage to the LC102, may cause the optional battery (if installed) to improperly charge, or may cause measure­ ment errors on low value of components. Only use a Sencore PA251 or PA252 Power Adap­ ter for AC operation.

To operate the LC102 from an AC line:

1 . Connect the AC line cord of the power adapter to an adequate source of AC power.

2.Connect the power adapter lead to the POWER INPUT JACK on the back of the LC102, as shown in figure 6 .

3.Push the POWER switch on the LC102 up to the ON

&BATT TEST position and release. The WARNING LED will momentarily blink to indicate it is operational and the displays will reset and read zeros.

4.The LC102 is immediately ready for use. If precise measurements are required, allow the unit to operate for 1 0 minutes to reach specified accuracy.

-----------------------WARNING----------------------

The CAUTION INDICATOR LED must momentarily flash when the POWER switch is first turned on and moved from the OFF to the ON & BATT TEST position. Failure of the light to flash indicates a problem with the LED or safety circuits. DO NOT operate the LC102 in this condition, since it exposes the operator to dangerous voltages without adequate warning.

Fig. 6 — Connect the PA251 to the 12 V DC in p u t for AC bench operation and to recharge the optional bat­ tery.

Battery Operation

The LC102 is designed to operate as a completely port­ able unit with the optional BY234 rechargeable battery installed. The operation of the LC1 0 2 when it is battery powered is the same as when it is AC powered. The length of time the AUTO-Z will operate before the bat­ tery needs recharging depends on several factors: 1 .the test functions used; 2. temperature; 3. battery age.

Leakage tests place the heaviest current drain on the battery —greater currents result in shorter battery life between charging. Value tests place the least drain on the battery. For typical operation, the LC102 provides approximately 7 hours of complete capacitor testing (value, ESR, D/A and leakage), and 8 hours of complete

12

inductor testing (value and ringing). These times, of course, will vary with temperature and battery age.

As the temperature of the battery decreases, its capac­ ity also decreases. The operating time between recharg­ ings decreases at the rate of approximately 1 hour for every 20 degrees F drop in temperature below 70°F. The BY234 battery is a sealed, lead-acid type which requires no maintenance other than recharging. As a battery ages, it will require more frequent rechargings. If used properly, the BY234 will provide several years of service before needing replacement.

You can maximize the lifetime of the BY234 several ways: 1. Never allow the battery to deeply discharge. The LC102 has a built-in battery test and low battery shut off circuitry. Check the remaining charge period­ ically and recharge the battery before the low battery circuit shuts the unit off. 2 . Keep the battery fully charged. The BY234 will not be harmed if it is left installed in the LC102 during AC operation. Instead, this will keep the battery fresh and ready for use and will actually lengthen its useful lifetime. 3. Recharge the battery before using it if it has sat idle for more than a couple of weeks. Lead-acid batteries normally loose some of their charge if they sit idle for a period of time.

------------------- WARNING---------------------

Observe these precautions when using leadacid batteries:

1. Do not dispose of old lead-acid batteries in fire. This may cause them to burst, spraying acid through the air.

2. Do not short the “+ ” and terminals together. This will bum open internal connec­ tions, making the battery useless.

3.Do not charge 12 volt lead-acid batteries with a voltage greater than 13.8 VDC. High charging voltage may damage the battery or cause it to explode.

4.Do not drop the battery. While lead-acid bat­ teries are well sealed, they may break if dropped or subjected to a strong mechanical shock. If the battery does break and the jelled electrolyte leaks out, neutralize the acid with baking soda and water.

5.Do not charge the battery below 0° C or above +40° C. (32° to 104° F).

Fig. 7 - The optional BY234 is installed in the LC102 fo r portable operation.

To install the optional BY234 Battery:

1 . Open the BATTERY COMPARTMENT COVER lo­ cated on the rear of the unit by unscrewing the thumbscrew. Fold the cover down on its hinge.

2.Slide the battery end that does not have the connector attached intothe battery compartment. (The wire should be facing out after the battery is in place.)

3.Connect the plug from the battery to the jack inside the battery compartment.

4.Close the battery compartment cover and tighten the thumbscrew to hold the door and battery in place.

Note: Recharge the B Y 2 3 4 overnight before using itfor the first time.

Battery Test

The LCX02 has a built-in battery test feature which shows the remaining battery charge. A reading of 100% indicates that the battery is fully charged. As the bat­ tery charge is used up, the reading will drop. The low battery circuits will turn the unit off shortly after the battery test reading drops to 0 %, and before the battery, level drops too low for reliable operation. The LC102 never fully discharges the battery which helps extend the life of the BY234.

13

To perform the battery test:

1.With a BY234 installed, move the POWER switch to the ON & BATT TEST position.

2.Read the percentage of remaining battery charge in the LCD DISPLAY.

3.If the reading shows 0%, the unit may not operate, or operate for just a short time since the low battery circuit turns the LC102 off at this battery level.

C O M P O N E N T T Y P E

i l U	M	i f i l J M	- X N iS i. f - ·					H
i . v T		i C S
		c	m					W		I
CAPs			A | , L	O		T K	F #
			C	A	P	?				I
m								Έ Γ	"	η
C OT^ S			■ ' O K F S 1
—	1	J	f i Y B	a	C	K	s - * ronMEftC
			1				)!,
	^		&			r g
P O W E R

Fig. 8 — Push the P ow er sw itch to “On & B att T e s t to read the rem aining battery charge.

Recharging the Battery

The BY234 battery should never be allowed to remain discharged for more than a few hours, since this will shorten its lifetime. The battery must be recharged whenever the battery test reads 0%. However, you should recharge the battery more often than this to lengthen the battery’s lifetime and keep the LC1 0 2 ready for portable use at all times.

To recharge the battery, simply leave it installed inside the LC102 while the unit is connected to the AC Power Adapter and the Power Adapter is connected to a source of AC power. The charging time required to return the battery to 100% depends on how far it is discharged. The battery will trickle charge while the LC1 0 2 is in use and powered from the AC adapter, but it will re­ charge the quickest if the POWER switch is in the “OFF” position. Normally, a battery will completely recharge in about 8 hours with the POWER switch “OFF” .

Auto Off

To conserve battery charge, the LC102 contains an auto off circuit. This circuit keeps the batteries from running down if you should forget to turn the unit off, but keeps the AUTO-Z powered up during use. The auto offcircuit will shut the LC102 off after approximately 15 minutes if none of the front panel buttons have been pushed. Pushing any COMPONENT TYPE button, COMPO­ NENT PARAMETERS button, TEST button, or momentarily moving the POWER button to the ON & BATT TEST position will reset the auto off circuits. The auto off circuits are bypassed when the LC1 0 2 is operated from the AC Power Adapter.

To operate the LC102 using the optional BY234 battery:

1. Install the BY234 battery into the LC102 battery compartment.

NOTE: If you are using the BY234 for the first time, be sure to charge the battery before using the LC1 0 2 . Though factory tested, the BY234 may not be charged when you receive it.

2. Push the POWER switch to the ON & BATT TEST position and release. The WARNING LED will momen­ tarily blink to indicate it is operational and the displays will reset and read zeros.

4. The LC102 is immediately ready for use. If precise measurements are required, allow the unit to operate for 1 0 minutes to reach specified accuracy.

----------------- -- W ARNING-------------------

The CAUTION INDICATOR LED must momentarily flash when the POWER switch is moved from the OFF to the ON & BATT TEST position. Failure of the light to flash indicates a problem with the LED or safety circuits. DO NOT operate the LC102 in this condition, since it exposes the operator to dangerous voltages without adequate warn­ ing.

STOP TESTING Indication

The LC102 is designed to provide you with the safest possible method oftesting capacitors and inductors. The STOP TESTING indicators of the LC102 are a flashing LED indicator on the front panel and an internal audi­ ble alarm. This important feature alerts you when a shock potential exists due to either the test lead fuse having blown, preventing the capacitor from discharg­ ing, or that you have connected to a charged circuit (1 0 V or more).

You should, at this time, familiarize yourself with this feature by removing the test lead fuse. Refer to the maintenance section, located at the back of this manual for information on replacing the test lead fuse (page 59).

14

If the STOP TESTING indicators activate:

1. Stop all testing with the LC102.

2 . Carefully discharge the capacitor you are testing by connecting a 1 0 k ohm 1 watt resistor across the termi­ nals.

3.Replace the test lead fuse if blown, or remove the voltage from the point the test leads are connected to.

4.Resume testing.

Test Leads

The test leads supplied with the LC102 (39G219) are made of special, low capacity coaxial cable. Using any other cable will add extra capacity to the meter circuits, which may not be within the range of the lead zeroing circuits. Attempting to zero the leads with another, higher capacitance cable connected will cause the LCD DISPLAY to show the message error. This indicates that the value is beyond the zeroing limits ofthe LC1 0 2 .

If the test leads ever require replacement, new leads (part #39G219) may be ordered directly from the: SEN­ CORE SERVICE DEPARTMENT at 3200 Sencore Drive, Sioux Falls, SD 57107.

Test Lead Mounting Clip

A TEST LEAD MOUNTING CLIP (64G37) is supplied with the LC102. This clip is useful to hold the test leads out of the way when not in use, but keeps them ready and within reach at any time. The mounting clip may be attached on the top of the LC102, on the side of the handle, or wherever it is most convenient. To mount the clip, peel off the backing, place the clip in the desired location and press it firmly in place.

Fig. 9 — The test le a d m ounting clip holds the test leads out o f the way, yet ready fo r use at anytim e.

N O T E : D o not mount the T E S T L E A D M O U N T I N G CLIP to the sides of the A U T O - Z . as this will interfere with the handle movement.

Test Lead Adapter

Some larger value electrolytic capacitors have screw terminals rather than the conventional wire leads or solder terminals. To connect the LC102 to these capacitors you will need to use the supplied 39G144 TEST LEAD ADAPTER. The TEST LEAD ADAPTER converts the E-Z Hook ® clips of the test leads to al­ ligator clips which will clamp onto the large screw ter­ minals. A mounting clip on the back ofthe LC 102 stores the TEST LEAD ADAPTER when it is not in use.

Fig. 10 - The 39G144 Test Lead Adapter allows large, screw -term inal capacitors to be connected to the LC102.

To use the TEST LEAD ADAPTER:

1 . Connect the red E-Z Hook® of the LC102 test lead to the red TEST LEAD ADAPTER terminal.

2.Connect the black E-Z Hook® to the black adapter terminal.

3.Connect the red TEST LEAD ADAPTER lead to the “ 4-” capacitor terminal, and the black lead to the “ —” terminal.

4.Test the capacitor in the usual manner.

Test Lead Fuse

A 1 amp, Slo Bio (3AG) fuse is located in the TEST LEAD inputjack on the front of the AUTO-Z. This fuse protects the unit from accidental external voltage or current overloads.

15

Lead Zeroing

The test leads connected to the LC102 have a certain amount of capacitance, resistance, and inductance which must be balanced out before measuring small value capacitors and inductors or before measuring capacitor ESR. The test lead impedence should be zeroed when the LC102 is first turned on. It will remain zeroed as long as the unit is powered on. If the LC102 is battery operated and is turned off by the Auto Off circuits, however, the leads must be rezeroed.

To zero the test leads:

1.Turn the LC102 on by momentarily pushing the POWER switch to the ON & BATT TEST position.

2.Connect the test leads to the TEST LEAD INPUT jack on the front of the AUTO-Z.

3.Place the open test leads (with nothing connected) on the work area with the red and black test clips next to each other, but not touching.

4.Move the LEAD ZERO switch to the “OPEN” posi­ tion. Release when a “ —” begins to move through the display.

5.Connect the red and black test clips together.

Entering Component Data

6 . Move the LEAD ZERO switch to the “SHORT” pos­ ition, and release when a “ —” begins to move through the display.

Fig. 11 — The im pedence o f the test leads is balanced o ut w ith the LEAD ZERO button.

Fig. 12— C ontrols used fo r entering com ponent data.

To use the LC102 to perform the automatic GOOD/BAD tests explained on page 26, you must enter data about the component under test into the LC102 AUTO-Z. (All component tests can be performed without entering

component data if automatic GOOD/BAD test indica­ tions are not desired). The component data tells the LC102 the “ideal” parameters necessary to make the GOOD/BAD determination.

16

The component data which can be entered into the LC102 includes: component type, value, tolerance and rated working voltage for capacitors, and component type, value, and tolerance for inductors and coils. These parameters are usually marked on the component, or can be determined by looking the component up in a parts list or replacement guide. The APPLICATIONS section of this manual contains information on how to identify capacitor and inductor types.

N O T E : All component data can be cleared by pushing the “C L R ” button on the gray C O M P O N E N T P A R A M E T E R S keypad twice.

To Enter Component Type:

N O T E :	The C O M P O N E N T T Y P E switches tell the
L C 1 0 2	what kind of component is being tested.

1 . Press the desired COMPONENT TYPE button. Use the beige color coded buttons when checking capacitors and the blue buttons when checking inductors.

2. A red LED indicator in the comer of the COMPO­ NENT TYPE button lights when that button is selected.

To Enter Component Value:

1. Enter a number, up to 3 significant digits, equal to the value of the capacitor or inductor. (Example: “123”. or “123000.”). Each digit will appear in the display as a key is pushed.

a. The L C 1 02 rounds the entry d o w n ifyou enter a number having more than 3 significant digits ( E x a m ­ ple: “1239” becomes “1230”).

b. The L C 1 0 2 accepts numbers up to 6 places before the decimal. (Example: “100000”). Entries larger than this reset to 0.

c. The L C 1 0 2 accepts numbers up to 5 places after the decimal for numbers less than 1. (Example: “0.00001”).Entries smaller than this result in “Error

2”.

d.All unnecessary place holder digits are dropped.

(Example: “.06700” becomes “.067”).

e.Push the “C L R ” button once to clear the value entry and start over.

2.Enter the desired capacitor value multiplier or induc­ tor value multiplier.

a.The capacitor value range is 1 p F to 19.9 F. The

inductor value range is .1 u H to 19.9 H. Entering values beyond this range causes an “Error 2 ”.

b. The L C 10 2 accepts non-conventional value nota­ tions, such as “.00001 F ”,“.00002 u F ”or “100000p F ”

3.After entering the multiplier, the display momentar­ ily shows the entered value and multiplier before re­ turning to a “0000” reading. The LC102 is now ready for the next parameter entry.

4.To check the entered capacitor value at any time, push any beige colored capacitor value multiplier but­ ton. To check the entered inductor value push any blue colored inductor value multiplier button.

5.To change φΐ entered value parameter, repeat steps

1& 2 .

To Enter Com ponent Tolerance:

1 . Enter a 1, or 2 or 3 digit number up to 100 which equals to the “ + ” value tolerance of the capacitor or inductor. Do not use a decimal.

2.Press the white “ + %” COMPONENT PARAMET­ ERS button.

3.Enter a 1 or 2 digit number up to 99 which equals to the “ - ” value tolerance of the capacitor or inductor. Do not use a decimal.

4. Press the white ■%” COMPONENT PARAMETERS button.

5. To check the entered percentage, press the white “ + %” or “ —%” button at any time.

SEN1CORE LC102 AUTO-Z CAPACiTCm-IMQUCTOR ANALYZER

0 u 0 u ‘

COMPQNFf*? PARA(*Ft£i

□ □ □ □ 0

0000

0000

SENCORE

LC 1Q2 AUTO*Z CAPACITOR.IXOUCTOft ANALYZER

π η η n u.u.u.u.

. COMPONENT PABAWfTfiflS

□000000

00000

SENCC3RE LC 102 AUTO-Z CAPACITOR· INDUCT OH ANALYZER

u u

0000

0000

0000

d

Fig. 13 — To enter com ponent data select the COMPO­ NENT TYPE sw itch which corresponds to the com po­ n e n t being tested (a). Next, enter the com ponent value

(b) and value tolerance (c). Finally, if testing a capacitor, enter the rated w orking voltage (d).

17

To Enter Leakage Voltage:

1 . Enter the desired voltage from 1 to 999.9 using the gray keys on the NUMERIC INPUT keypad. A decimal, followed by one digit may be entered, but is not neces­ sary.

2. Push the white “V ” key to enter the voltage. The voltage will appear in the applied voltage LCD display. For values greater than 25 volts the red WARNING indicator LED will blink.

N O T E : The voltage is applied to the component Test

Leads when the C A P A C I T O R L E A K A G E test button is

pushed.

3. To enter a different voltage, repeat steps 1 & 2 .

Error Codes

Several error conditions may occur while using the LC102 which cause an error message to appear in the LCD display. These are usually caused by small errors in the operation of the LC102, although severely defec­ tive components may also cause certain error condi­ tions. The error conditions are explained below.

Error I - Component Type Selection Error - This error occurs when a component test is attempted, and either an incorrect COMPONENT TYPE switch is selected for the test, or no COMPONENT TYPE switch is selected when required.

Possible causes:

1.Performing a capacitor test with an inductor COMPONENT TYPE switch selected.

2.Performing an inductor test with a capacitor COMPONENT TYPE switch selected.

3.Performing the INDUCTOR RINGER test without an inductor COMPONENT TYPE switch selected.

4.Performing any component test with the “Spare” capacitor COM­ PONENT TYPE button selected.

Error 2 - Entered Value Beyond Range of Unit - The component parameter entered via the keypad or IEEE is beyond the measuring range of the LC102.

Possible causes:

1.Entering a capacitance value greater than 19.9 Farads, or less than 1 picofarad.

2.Entering an inductance value greater than 19.9 Henrys, or less than .1 microhenrys.

3.Entering a leakage voltage greater than 999.9 volts.

4.Entering a tolerance percentage greater than +100%, or less than

- 99%.

5. Entering a tolerance percentage that includes a decimal.

N O T E : Entering a leakage voltage less than 1 volt will

set the leakage supply to 0 volts.

Error 3 - Entered Value Beyond Range Of Test

The component parameter entered via the keypad c IEEE is beyond the limits ofthe automatic GOOD/BA test. The component may still be able to be tested, bi not for a GOOD/BAD indication.

Possible causes:

1.Performing an ESR test with a capacitor value of less than 1 u entered.

2.Performing a D/A test with a capacitor value of less than .01 u

entered.

3. Performing a INDUCTOR RINGER test with a inductor value less than 10 uH entered.

Error 4 - Value Beyond Zeroing Limit - The amour of inductance or capacitance at the TEST LEAD INPU is beyond the range of the zeroing circuits. An ope (greater than 2 0 kohms) or shorted (less than 1 ohir test lead will cause the "OPEN” or “SHORT” annur ciator to come on, rather than produce an “Error 4”.

Possible causes:

1.The capacitance at the TEST LEAD Input is greater than 1800 pF.

2.The inductance at the TEST LEAD Input is greater thah 18 ut

3.The resistance at the TEST LEAD Input is greater than 1 ohm

Error 5 - No Voltage Entered - This error occur when the CAPACITOR LEAKAGE button is pushe and no test voltage has been entered.

Error 6 - Invalid Computer Interface Command

An improper command was sent to the LC102 via th computer interface.

Possible causes:

1.Sending a command that is not recognized by the LC102.

2.Wrong command syntax.

N O T E : Refer to the C O M P U T E R I N T E R F A C E sectio, of this manual for information on using the A U T O -4 with computer control.

Error 7 - Component Out Of Test Range - The com ponent under test exceeds the limits of the test whici was attempted.

Possible causes:

1. Measuring ESR of a capacitor having a value less than 1 uF.

2.Measuring capacitance value on an extremely leaky capacitor.

3.Attempting a capacitor value test with 1 ohm to 2 Megohms <

resistance connected across test leads.

18

Capacitor Testing

Fig. 14— C ontrols used fo r ca p a cito r param eter tests.

The LC102 AUTO-Z checks capacitors for value from 1.0 pF to 20 Farads in 1 2 automatically selected ranges. The automatic features of the LC102 AUTO-Z allow you to perform two levels of automated capacitor test­ ing: basic parameter testing, and automatic GOOD/ BAD testing. For basic parameter testing, you simply connect the component to the test leads and push the test button. The LC1 0 2 measures the capacitor and displays the test result. You must look up the values of leakage, ESR and dielectric absorption in a table to determine if the capacitor is good or bad.

For automatic GOOD/BAD testing, you first enter the parameters of the capacitor before performing the test. Then the LC102 will display the test results along with a GOOD/BAD indication of the capacitor. Only selected parameters need to be entered into the LC102, depend­ ing upon which tests you desire a GOOD/BAD readout for.

Capacitance M easurem ent A ccuracy

The LC102 measures the RC charge time as the capacitor is charged through a precision resistor. This gives the most accurate measurement of true capacity available. Capacity values measured with the AUTO-Z may or may not exactly match readings on other instru­ ments which use a different measuring technique. Bridges, for example, measure capacitive reactance

using an AC signal. Capacitive reactance changes with frequency. Therefore, two bridges operating at different frequencies will give different capacity readings.

Electrolytic capacitors may normally read up to 50% higher than their marked value when measured with the LC102. This is because electrolytics are marked according to their value as measured on an AC-type impedance bridge. The value of an electrolytic changes greatly with the measurement frequency. This should cause no problem in determining if an electrolytic capacitor is good or bad, since most electrolytic capacitors have up to 80% value tolerance. The capacitor should read close to its marked value, or within tolerance when checked with the LC102. In ad­ dition, electrolytics most commonly fail due to leakage, dielectric absorption, or ESR. When an electrolytic does change value, the value drops far below the marked value.

The LC102 AUTO-Z is designed to measure capacitors out of circuit. Impedances found in the circuit will upset the AUTO-Z readings. Capacitors can not be checked in circuit accurately or reliably with any test method. Capacitors in circuit, however, may be tested by unsol­ dering one lead from the circuit. When doing this, be sure to remove power from the circuit. If the unit is AC powered, unplug the AC line cord. Whenever possible, remove the capacitor completely from the circuit to test it.

19

■WARNING

When checking capacitors, remove the capacitor from circuit if possible. Otherwise, make sure the power is removed from the cir­ cuit and the AC line cord to the unit contain­ ing the capacitor is unplugged. Always con­ nect the capacitor to the LC102 test leads be­ fore depressing the CAPACITANCE VALUE test button, to prevent discharge into test cir­ cuitry.

M easuring Small Capacitance

V alues In N oisy Environm ents

The sensitive AUTO-Z measuring circuits may be af­ fected by large, outside signals (such as the AC fields radiated by some lights and power transformers) when small capacitance values are being measured. Special circuits in the LC102 help minimize noise pickup and stablize the readings.

Measurements of small value capacitors in noisy envi­ ronments may be further improved by grounding the LC 102 case to earth ground. When possible, power the LC102 with the PA251 AC Power Adapter connected to a properly grounded AC outlet. The PA251 Power Adapter maintains the third wire ground shield and keeps the noise away from the measuringcircuits inside the AUTO-Z.

Capacitor Parameter Testing

The LC102 checks capacitors for capacitance value, leakage, dielectric absorption and equivalent series re­ sistance (ESR), These tests are made directly using the beige colored TEST buttons. Simply connect the compo­ nent to the test leads, push the desired TEST button, and read the test result in the LCD display. You can determine if the component is good or bad by comparing the measured ESR and leakage values to the standard values listed in the tables in this manual and on the PULL CHART underneath the LC102.

N O T E : Except for the capacitor leakage test, no compo ­ nent parameters need to be entered to perform any capacitor parameter test, if any blue Inductor C o m p o ­ nent Type button is selected, error code “Error 1” will appear in the L C D readout when you attempt to make

a capacitor	test. Push the “C L R ” key on the gray
N U M E R I C	keypad twice to clear any parameters.

The following procedures provide all the necessary in­ formation required to perform the capacitor parameter tests. A more detailed description of each of the capacitor tests and failure modes can be found in the APPLICATIONS section of this manual.

M easuring Capacitor Value

To Measure Capacitor Value:

1.Zero the test leads, as explained on page 16.

2.Connect the capacitor to the test leads. If t capacitor is polarized, be sure to connect the black t< clip to the “ —” terminal of the capacitor and the i test clip to the “ + ” capacitor terminal.

3.Depress the CAPACITOR VALUE button.

4.Read the value ofthe capacitor in the LCD display.

N O T E : The “S H O R T ” annunciator appearing in \ L C D display whe n the C A P A C I T O R V A L U E buttor, depressed indicates a resistance of 1 o h m or less at \ test leads. Check the test leads. If they are not short the capacitor is bad.

Some capacitors will cause the display to read “Er: 7” . These capacitors have too much leakage current allow the LC102 to make a value check and should considered bad.

.·	i.W—ΈΒΒΒ	kClOSt	AU TO ·*	CAPACfTO*-»tilMJCTOR AttJltYMiH
				j vwt·
COMKJWWt T<r*f
■sr	*
	«— i
Ξ 0	Θ	Β Β	Β Β	0 Ξ 0
3Ετ · φ		0 1	n r	;

Fig. 15 — To m easure capacitance, connect capacitor to the te st leads and push the CAPACH VALUE button. The am ount o f capacity appears in LCD display,

M easuring Capacitor

Dielectric Absorption

Dielectric Absorption is often called “battery action “capacitor memory” and is the inability of the capac to completely discharge. While all capacitors have s< minute amounts of dielectric absorption, electroly may often develop excessive amounts which affect operation of the circuit they are used in.

20

To check a capacitor for dielectric absorption, press the DIELECTRIC ABSORP button and compare the value to the chart. A fully automatic GOOD/BAD test may also be used to test for dielectric absorption. This test is explained on page 26.

To measure capacitor dielectric absorption:

1 . Connect the capacitor to the test leads. If the capacitor is polarized, connect the red test clip to the “ + ” capacitor terminal and the black test clip to the “ —” terminal.

2 . Depress the DIELECTRIC ABSORP button. A “ - ” will appear and slowly move through the display indi­ cating that the test is in progress.

3.Read the percentage of dielectric absorption on the display.

4.Compare the measured D/A to the amount listed in Table 1 for the capacitor type you are testing to deter­ mine if the capacitor is good or bad.

N O T E : Depending on the capacitor’s value, type and actual D/A, the L C 1 0 2 may, in a few cases, take up to 10 seconds to display a reading.

M aximum Allowable Percent Of D/A

C apacitor type	Maximum % of D/A
Double Layer Lytic	Meaningless. D/A may normally
	be very high.
Aiuminum Lytic	15%
Tantalum Lytic	15%
Ceramic	10%
All others	1%

Refer to the APPLICATIONS section of this manual for capacitor type identification.

Table 1 — M axim um am ounts o f D ielectric A b sorption .

Measuring Capacitor

Leakage (In microamps)

Capacitor leakage occurs when some ofthe voltage from one plate flows (leaks) through the dielectric to the other plate. The amount of leakage current through the dielectric depends on the voltage applied across the plates. For this reason, always check a capacitor for leakage at (or as close as possible to) its rated voltage. Voltages up to 999.9 volts may by applied with the LC102.

To check capacitors for leakage, enter the working vol­ tage ofthe capacitor and press the CAPACITOR LEAK­ AGE button. Compare the measured leakage current to the maximum allowable amounts in the leakage

charts. The capacitor is good if the measured leakage is below the amount shown in the chart. A fully automa­ tic GOOD/BAD test may also be used to check capacitors for leakage. This test is explained onpage 26.

Ι Π Γ Ι Π V0LTS

I U U.U

O M P Q N E N T P A R A M E T E R S

L E A K A G E

#

Fig. 16— To test capacitor leakage, enter the w orking voltage o f the capacitor.

To measure capacitor leakage:

1 . Connect the capacitor to the test leads. If the capacitor is polarized, connect the red test clip to the “ + ” capacitor terminal and the black test clip to the

terminal.

2.Set the LEAKAGE switch to the “CURRENT” posi­ tion to read the leakage ofthe capacitor in uA or mA.

3.Enter the normal working voltage of the capacitor as explained earlier in the section “Entering Compo­ nent Parameters” on page 16.

------------^-------WARNING-------------------

The LC102 is designed to be operated by a technically trained person who understands the shock hazard of up to 1000 volts applied to the test leads during the capacitor leakage test. DO NOT hold the capacitor in your hand, or touch the test leads or capacitor leads when making the leakage test.

4.Depress the CAPACITOR LEAKAGE button and read the amount of leakage in the LCD display.

5.Compare the measured leakage to the maximum allowable amount listed in the Leakage Charts onpages

23and 24 for the type, value, and voltage rating of the capacitor you are testing.

N O T E : B y entering the Component Type and Value parameters for the capacitor, the L C 1 02 will automati­ cally display the measured leakage along with the same G O O D IBA D indication as the Leakage Charts.

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