Sears 82413 Bedienungsanleitung

36.RA]\[GE

DIGITAL MULTIMETER

Sears Model 82413/ 52418

Operator's M4nual

Printed in Korea SearsrRoebuck and Co.

I. MULTIMETER SAFETY

READ this information before using thc tnctcr

WARNINGS denote hazards to thc opcrntor'

CAUTIONS denote hazards to the mctcr.

SAFETY RULES

1{arning

This tester has been designed with yorrr s.tlclt itt trrind.

However, no design can completely protcct .il',.rirrst rrr( (,r'tcct

use. Electrical ci.rcuits can be dangerous rtrcl/r,r l.tlr.rl rvltcn

lack of caution or poor safety practices arc trst ti.

Read the Manual

Read this Instruction Manual carefully rntl .,rrrplr'tt'ly.

Voltages and currents within the capabillty ol trtt.isLtfc-

ment with this test equipment can be hazartlotts. 1,,11,,t'tlrc

instructions in this manual for every meastlrclrlc lrt l{t .rtl rrttd

understand the general instructions beforc attclrrptirrll tt,

use this tester. Do not exceed the limits of tllc tcstcr,

Safety Check

Double check the switch

before making measutements.

instruc tions?

Disconnect the tester or

changing switch positions. turn off the

Do not connect to circuits with voltage

switclr is in any ohms or current position.

Whcn rcplacing fuses use only specificd

inscrt in correct fuse notd"j.,, _

setting, and lcad connections

Are you following all of the

power before

present when

type fuses and

Don't Touch

Don't touch exposed wiring, connections or other ,,live,,

parts of an electrical circuit, If in doubt, check the circuit

first for voltage before touching it.

Turn off the power to a circuit before connectins resr

probes to it. Be sure there is no voltage present beforJ you

touch the circuit.

Do not use cracked or broken test leads,

High Voltage is Dangerous

Always start with the power off,

Be sure there is no voltage present before

nections to the circuit. making con-

Don't touch the tester, its test leads, or any part of the

circuit while it is on.

Before disconnecting the tester, turn the circuit offand

wait for the meter to return to "zero.,,

Distribution Circuits Pack a Punch

In high energy circuits such as distribution transform.ers

and bus bars, dangerous arcs of explosive nature can occur if

the circuit is shorted. If the tester is connected across a

high energy circuit when set to a 1ow resistance range, a

current _range, or any other low impedance range, the circuit

is virtually shorted.

Special equipment designed for use with these circuits

is available. Conract a qualified person for assistance before

attempting to make measurements on any high energy

circuit.

SAFETY rS No ACCIpENT

-2-

2. PROTECTION-UL 1244, VDE O4I1

Fully Overload hotected

- Ot*l..d protection is accomplishcd orr rrll t;trtllcs For

overvoltage protection' a seclected sparkgap witlr low capa-

cidance is-used which proved superior in pcrlirrtttrtrrcc'than

the varistors used in other instrumcnts Art ilrrrrslr ( tlrrcnt

limiter combination protects 500V DC or lttrs A(l trrt all

resistance rages.

Al.o " pair of fast switching high cttrrcrrt siltc()rr (li()des

plus a fuse provide excellent protection on rll ' ttttt ttt rrtrtgcs'

Furthermore, the input of the analog to ililiitrrl I ()trvcrtcr

is protccted against overvoltages.

Frotected Inpuf Socket and Test Lrads

The 0.16 in. input sockets are fully rcccsse'l 'ttrrl pro-

tected against accidental contacts The tcst lcarls srtpl>licd

with the equipment give added safety to tltc usct sitrt. the

jacks are sheathed thus avoiding dangerous corl'rfcti()rrs to

-eventual high voltages. The prods supplicd havc. lirtgcr

stoppers to k""p fingers away from the barc cnd' 'Ilr(: l)r'od

t"r-in"ls are sufficiently long and slendcr to rcach :tny tt:st

points found in actual boards.

Operator Protection

pt"tri" ,ASS casing is intrinsically insulated' Deeply re-

cessed socket and safety leads insure a large degrce of pro-

tcction to the user. Strong current cut-off power in case clf

accidcntal or erroneous connection to a power source, will

blow a fusc without damage to the operator or equipment

(rrt, :rrc in rlre frts. , tlo itlstrultt.'nt burn-out)'

x (0.25% of rdg + 1 digit)

3. SPECIFICATIONS

Geneil

oi"pt"y, ZUdigit LcD. 0.5tt height, with polarity and

LO BAT indication.

Overrange Indication: 3 least significant digits blanked.

Maximum Common Mode Voltage: 500V peak.

Operating Environment: 0o to 50oC;less than S}Vorelat\ve

humidity up to 35oC, less than 70% relative humidity

from35oC.to 5OoC.

Storage Environment: -15oC to 50oC.

Temperature Coefficient (0o to L8oC and 28o to 50oC): less

than 0.1 X applicable accuracy specification per oC.

Power: 9V alkaline or carbon-zinc battery (NEDA 1604)

Battery Life: 100 hours typical with carbon-zinc cells 200

hours with alkaline cells.

Battery Indicator: Display indiates "LO BAT" when Iess than

2Mo of life remains.

Dimensions Weight: 6.7'.'Hx 3.4"'w x 1.7t'D (17Omm X

87mm X 42mm), 13.4 O2 (3829)

DC Voltage

Range

200mV

20v

200v

1000v

Resolution

0.1mV

1mV

1OmV

10OmV

Accuracy

Input resistance: 10M ohm on all ranges.

Normal Mode Noise Rejection: 46dB at 60Hz (1KO unbalance)

Common Mode Noise Rejection: 100dB at 60llz

Overload Protection: 1000V DC or AC peak on rll r:rnges

ResponseTime:(1Sec.

qqlsqeq

Range Resolution Accuracy Max. F.S.

Voltage Drop

Common Mode Noise Rejection: 60d8, 5OHZ - 60HZ (1kS,

unbalance).

Overload Protection: 1000V dc or 750V rms ac continuous,

except 15 sec max above 300V on 200mV range,

Resoonse Time: 1 Sec.

AC Current

Range Resolution Accuracy

200p4

zmA

20mA

200mA

200OmA

10A

Overload Protection mA Input: 2Al250Y fuc.

10A Input: Unfused up to 15A for 1 5 sccortds.

AC Voltage

Range Resolution Acctrracy

200mV 100p.V

2V 1mV

20V 1OmV ! (0.5% rdg + 5 digits)

200V 100mV on all ranges

750V lV + (l% ds + 5 disits)

200p"4 100nA

2mA 1pA

20mA 1OpA

200mA 10OpA

2000mA lmA

10A 10mA

Overload Protection mA Input: 24/250V fuse

10A Input: unfused up to 15A for 15 sec.

Resistance

Range Resolution Accuracy

100nA !(O.5% rdg + 1 digit)

lp.A !(0.5% rdg + 1 digir)

10pA !(0.5% rdg+ 1 digit)

100pA +(0.75% rdg+ l disit)

1mA +(2%rdg+5digits)

10mA +(2%rdg+5digits)

0.25 V

0.75 V

0.30 v

x (0.7 5% rdg + 5 digits)

! (0.7 5% rdg + 5 digits)

+ (0.75% rdg + 5 digits)

! (0.75Vo rdg + 5 digits)

t Q% rae + 5 digits)

+ (2%rdg+ 5 digits)

Max. F.S.

Voltage Drop

0.25V rms

0.75V rms

0.30V rms

Max, Open

Circuit V

Freq Range

45Hz - 500H2

on all ranges

2004 100mO

2KA ls}

20KO 10sl

200Ka 1000

2Ms} 1KO

20Mo 10KO

Max aliowable input:

! (0.5% rdg + 3 digits) 2.8 v

x(0.3% rdg+ 1 digit) 2,8v

x (0.3% rdg + 1 digit) 500 mV

! (0.3% rdg + 1 digit) 500 mV

X (0.75Vo rdg + 2 digits) 500 mV

! (2.5% rdg + 5 digits) 500 mV

500V dc or rms.

-6-

Convcrsion: Calibrated for rms of sine wave

lnput Impedance: 10M shunted by 100pF on all ranges

cxcept 200mV trnt"._ U _

Continui9Test ('ttl )

Resistance range: Btzzer sounds with rcsistances less than

200O approximately.

Resoonse time: Less than 100 m Sec.

Diode Test ( -t<- )

Test voltage: 2.8 Volts

Maximum test current: 3m Ampcres,

Temperature Measurement

4. OPERATING INSTRUCTIONS

General

hFE Test

i"rt.orditior : 1OuA 2.8V

hFE gain 0 - 1000 (NPN. PNP)

The Sears Model 82413182418 is completely portable,

high level 3-112 dig:^t multimeter designed for use by the

engineer, technician, and hobbyist who demands an in-

sturment that is accurate, reliable and always ready for use.

Equipped with nine functions and 36 ranges, each test

position is quickly and easily selected with a simple rurn of

the single selector switch. Smail enough to fit in attache

cases and equippid -*'rth a multi-position tilt stand. This

instruments is equally suited for design engineering, pro-

duction. testing, field servicing, and industriJl mainienance

apprlcatlons.

wffi;s

T. fo ^-la electrical shock hazard and/or damage to the

instrument, do not measure voltages that mighl exceed

500V above earth sround.

2. Before the use oiinstrument, inspect test leads, con-

nectors, and prodg for cracks, breaks, or any defects in the

insulation.

DC Voltage Measurement

1. Connect red test lead to ,,V,A", input connector and

black to "COM".

2. Slide the POWER/FUNCTION switch to ,,DC O,' (mid

position).

3. Set RA,NGE switch to desired ,,V', position. If magnitude

of Value not only for this functioniut "ru -""r.r1"rn"rr,

factor is not known, set switch to highest range and reduce

untill satisfactory reading is obtained.

Range Re solution

OoF ro 2000oF 1oF

Sensor; type K (NiCr-NiAI)

Conductance Measurement

Range

200nS

Resolution

0.1nS

Capacitance Measurement

Range

2000pF

2uF

20uF

Resolution

1pF

0.001uF

0.01uF

Accuracy

+ (50 + 2 aigitr; ,p to ZZSof

! 3% of rdg ovcr 2250F

Accuracy

t(7.5% rdg + 10 digits)

Accuracy

!(r.s%F.S.+5disits)

!(z7oP.s. + 5 digits)

+ (2Vo F.s. + 5 digits)

-7-

5. Connect test leads to device or circuit bcing measured.

Turn on power to device or circuit bcing measured.

Voltage value wili appear on Digital Display aiong with

the voltage polarity.

DC Current Measurement

1.. Red lead to "mA" jack for measurcrncr)ts rrp to 2 Amps,

Black lead to "COM" jack.

For measuremenb between 2 Amps and l0 Amps, connect

red lead to "l0A" jack.

POWER/FUNCTION switch to "I)C ()", rnd RANGE

switch to desired "A'' position.

Open the circuit to be measured, and conncct test leads

IN SERIES with the ioad in which currcnt is to be

measured.

Read current value on Digital Display.

AC Voltage Measurements

L. Red lead to "V-s}", Black lead to "COM".

2. POWER/FUNCTION switch to "AC", and RANGE switch

to desired "V" position.

3. Read voltage vaiue on Digital Display.

Resistance Measurements

1. Red lead to "V. f,}", Black lead to "COM".

2. POWER/FUNCTION switch to "DC s2", and RANGE

switch to desired "OHM" position.

If the resistance being measured.is connected to a circuit,

turn off power and discharge all capacitors before

applying test prods,

Connect test leads to circuit being measured.

Read resisrance value on Digital Display.

Continuity Checks

1. Red lead ro ,,V. o,', Black lead to ,,COM,,.

2. POWER/FUNCTION switch to ,,DC A" , and RANGE

switch to Btzzer ( ,r|) ) position.

3. Connect test leads to the circuit under test.

4. Built-in buzzer sounds if the circuit under test is con_

tinuous.

)

Diode Tests

L. Red lead to ,,V.f,)',, Black iead to ,,COM".

2. POWER/FUNCTION switch to ,.DC 0,',, and RANGE

switch to the 2K,e ( +<- ) position.

3, Ifthe semiconductorjunction being measured is connected

, to a circuit, turn off power and discharge all capacitors.

4. Connect test leads to device.

5. In case of connection of forward (Red to anode, Black

to, cathode) a good diode shows a value. If the diode

under _test is defective, "000,' (shorted), o, ,,1,, (opend)

is displayed.

When the test leads are connected reverse (Red to

cathode, Black to anode), a good diode shows ,,1i'. Ifit is

defective, "000" or other figures are to be displaved.

-9-

Connect test leads to the measuring point and read the

value on Digital DisPlaY'

th" -"t"t can be used for making temperature measure-

ments by connecting the tempelature probe (included) to

,,v.o,,, and ,,coM" jack.

Do not exceed 150V continuously or 300V momentary

(no more than l0 seconds) to avoid any dannge between

the ..V. A" and "COM" jack or instrument.

POWER/FUNCTION switch to "DC o" , and RANGE

switch to "TEMP" position.

Remove the protective plastic tube from the thermo-

couple place tihe probe or thermocouple tip on or in the

material to be measured and take the temperature reading

directly from the display. The reading is in Fahrenheit

r "F).

The meter is designed to show temperature automatica-

lly when a thermocouple is plugged into the jack' but

the display will show "1" when no thermocouple is

connected.

Conductance Neasyrenebt

@leadto"coM".

2. POWER/FUNCTION switch to "DC O" , and RANGE

switch to "S = 1 "

)

ral

r' A' S; SIMENS = -oh; = international unit of con-

ductance formerly known as the mho.

B. The readout is in terms cif conductance with unit

nS (10-95). If resistance rcading is required, yo11

can divide I by the t""Jo"i, ft"ti-"rtdly by'i010'

2. Use conductance measurement as a leakage tester.

The S conductance mngp effectively extends the

resistance measurement capability of this DMM to the

point up to 10,000M ohm where it can be used to

provide useful leakage measurement on variable com-

ponents, diodes, cables, connectors, printed- circuit

6oards (pcb's), etc. In all cases the test voltage is

<5V DC.

I x 1010 = 0.1 X 1010 = Resistance (ohm)

Readout

For ExamPle;

If the measurement result is 10, the resistance reading

J x toto = 0.1 X loro = l,oooM ohm

10"

Capacitance Measurement

1. POIIVER/FUNCTION switch to "DC S|" , and Range

switch to desired "CAP" position.

2. Before measurement, all capacitance ranges should be

set to zero, with an open condition without a condenser

connected to CAP sockets, rurn the "CAP ZERO ADJ"

so that zero reads on display.

3. Connect capacitance test leads to condesser (For mea-

surement of polarized qondensers, have the polarities of

the CAP sockets, agree with those of a condenser).

4. Read capacitance vaiue on Digital Display.

Tt*rtrt- ttFE N{""."*-""t

1. POWER/FUNCTTON switch to , and RANGE

switch to "PNP" or "NPN" position according to rype

of transistor.

2. Insert pins ofemitter, base, and collector ofthe transistor

jnto E.B.C. pin socket respectively.

3. Read the displayed value of transistor gain (hFE) between

0 to 1000.

B"tt"ry R"et"""-""tlcAtrrroNl

Before attempting battery removal or rephcement, dis-

connect test leads from any energized circuits to avoid

shock hazard. - 13 -

2. Slide the battery cover upward by pressing it inward.

3. Unsnap the battery connector and replace with new 9

volt battery. For maximum life use Sears DieHard

alkaline 9 volt battery, although any standard 9 volt

battery is suitable.

4. Piace the battery covet in right position.

fry-R"PbIgggtI-

1. This instrument is provided with a 2Al250V fuse to

protect the current measuring circuits which measure up

to 2000mA.

tTo replace the fuse, slide the battery cover upward by

pressing it inward.

Replace blown fuse with new 2Al250V fuse. To prevent

fire, do not use a fuse which has a higher rated value

than soecified.

Calibration

We do not recommend that yorl attempt calibration

yourself. It is a highly technicai procedure that requires an

extremely accurate power supply. If your knowledge is

complete and you have such a power supply, fol1ow these

instructions.

1. GENERAL

1-1. Perform calibration at an ambient temperature of

74oF to 80oF and a relative humidity of 80% or less.

Allow instrument to stabilize at this temperature for

at least 30 minutes.

If the measurement result is 1000

| .^

,^*^ x l0ro =0.001 x1010

rvvv =l0Xl06ohm

= l0M ohm

It is necessary to replace battery

BAT" appears in the upper left

scteen.

when the words "LO

corner of the LCD

- 14-

1-2. Remove the rear cover from the instrument by re-

moving three screws and then lift off the cover.

DC CAL

2-1. Slide POWER FUNCTION switch to "DC f,i" , and

the RANGE switch to 200mV position.

2-2. Set the output of the calibrator 1 9OmV ! 0.02% ^nd

connect it to the "V.A". and "COM" inout connec-

tors of the instrument.

2-3. Using a small flat-tipped screw driver, adjust poten-

tiometer VR1 (DC, ADJ) until multimeter Digital

Display reads exactly 190.0.

2-4. Remove the DC calibrator output from multimeter.

AC CAL

3-1. Slide POWER/FUNCTION switch to "AC".

3-2. Set the output of the AC calibrator for 190mV t

0.057o pwe sine wave at a frequency between 45 -

500 HZ, and connect it to the '!V.d]" and "COM"

input connectors of the mulrimeter.

3-3. Adjust potentiometer VR2 (AC, ADJ) until display

reads exactly 190.0.

CAPACITANCE CAL

4-1.2000pF

Slide POWER/FUNCTION switch to "DC O" , and

RANGE switch to 2000 p position, Turn the "CAP

ZERO ADJ", so that zero reading on display. Connect

100pF standard capacitor to CAP test leads, and

tur:n the VR3 so that 1000 reading on display.

4-2. 2uF

Set the RANGE switch TO 2p position, and turn the

"CAP ZERO ADJ" so that zero reading on display,

connect 1pF standard capacitor to CAP test leads,,and

VR6 so that 1,000 reading on display.

4-3. 20ttF

Set the RANGE switch to 20trr position, and turn the

"CAP ZERO ADJ" so thar zero reading on display.

Connect 1OpF standard capacitor to CAP test leads,

and turn the VR5 so that 10.00 reading on display.

5. TEMPERATURE CAL

Slide POWER/FUNCTION switch to ,,DC O', , and

RANGE switch to Temp position. Set the output of the

calibrator to DC 0,798mV ! 0,02% and connecr it to

the "V'O" and "COM" input connectors. Adiust VR7

until display reads exactly 680F + ambient t"-pir"tur".

Example: ambient temperature is 770F

68"F+77oP=113oF

6, Set the reat cover to the instrument by tightening three

screws.

icAtnloNl

The calibration procedures should be perforrned in regular

sequence. Always DC voltage must be adjusted pdor to

AC voltage adjustment.

_ 15_ - 16 -

SYMBOL

BU1

BU2

LCD

cs1

Q 1,2,3,5,6

D7,2

D3- 10

BD1

7Dl

a)2

c1,2,3

c6,7,t7,12,73

('1 0

c14

cl5, 17

c16

cr8,19,20

c21,26,27

c22

c25

c28

8C1,,2

R9, 10

Rll

R1 2, 13

R14

R15

R16

R17

R18

R19

R20

R21

R22

R23

P,24,25

\2?

R26,28

R29

BR1

BR2

BR3.6

VR1, 2

VR3

VR4

VR5, 6

VR7

BVR.1

RNA

RNB

RNC

RND

RNE

RNF

RNG

PART LIST

DESCRIPTION

A/D CONVERTER ICL 71 06

EX or GATE CD4070 or CD4030

OP AMP SFC 2776

DUAL TIMER NE556

OP AMP LM3O8A

OP AMP TL061

NAND GATE CD4O1 1

LCD DlSpLAy 3v2 DlctT (5 1 3031.303R)

CURRENT SOURCE LM334

TR, SI, NPN, 2N 3904

TR, SI, NPN, MPSA92

DIODE, SI, 1N 54OO

DloDE, Sr, Sw lN 4148

DroDE, sr, sw 1N 4148

ZENERDIODEl2V]N963

ZENER DIODI] 1,2V 1N 94918

CAPACITOR it}pF ]6V ELECTROLYTI.]

CAPACITOR 1p F 16V IANTAI_

CAPACITOIi. 4.7p F 1 6V E T.ECTROLYTIC

CAPACITOR 0.1rJ F 63V ME tAL|ZF,D

CAPACITOR 0.022!F 630V MrCA

CAPACITOR O.04'1 1tF 63v METAI,IZED

CAITACIIOR 0.22pF 63y MHT,ALIZED

CAPACITOR 100pF 50V MtCA

CAPACITOR 0.01p F 50V CERAMIC

CIAItrACITOR 30pF 50V CERAMIC

CAPACITOR 0.33pF 16V ELECTROLYTTC

CAPACITOR 0.022pF 5Ov CERAMTC

CAPACITOR 0.22pF 50y CERAMIC

CAPACITOR. i00pF 50V CERAMTC

CAPACITOR 0.1ll F. 5Ov CERAMIC

CAPACITOR 220pF 50V CERAMIC

|1.jjSISTC,R 100Ko /zWJ. CARBON

RESISTOR 910Kf,l 7zWJ. CARBON

RESISTOR lOOO /ZW C. METAI,

RESISTOR l OMA IIW ( . MI-TA I

RESISTOR 9OOO %W C. METAL

RESISTOR O.O89O %W C. WIRE WOUND

RESISTOR 1OO Y.W. F. METAL

RESISTOR 12OKO 1/8 W F. METAL

RESISTOR 100o 1/8 W. F. METAL

RESISTOR 100KO 1/8W F. METAL

RESISTOR lOKO 1/8W F. METAL

RESISTOR 4.5KO 1/8W F. METAL

RESISTOR tMf,i I/rW J. CARBoN

RESISTOR 4OOKA 74W F. METAL

RESISTOR lOOKO 7AW F. METAL

RESISTOR 5K{T%W F. METAL

RESISTOR 8.2Ktt y4w l. CARBON

R ESTSTOR 20Ka t/4w F. vetRl

R.ESISTOR 23KA %W F. METAJ-

RESISTOR 50KO /rW F. METAL

RESISTOR I.2MTIY4W F. METAL

RESISTOR 35ON %W F. METAL

RESTSTOR l1Ktr%w l. CARBON

RESISTOR 2KO i.wJ. CARRON

RESISTOR 4.7A %W J. cARBoN

RESISTOR 22OKST /4W I. CARtsON

RESTSTOR 68oKo '/4w l. cARBoN

RESISTOR lMf} /rW I. 'ARBON

SEMI VR 5KO 092 TVPE

SEMI VR 5KA 092 TYPE

SEMI VR 2.2KO HlO5IC

SEMI VR 5OOO RVIY6 FGR

SEMI VR 2OKO RVW6-.FGR

SEMI VR 5OOKO 092 TYPE

NET'WORK RESISTOR HC DMM_.V

NETWORK RESISTOR HC_DMM_-S

NETVORK RESISTOR HC_501-C

NETVORK RESISTOR HC,5O1. D

NETWORK RESISTOR RN_ET'I

NETWORK RESISTOR RNET .]

NET'WORK RESISTOR RNET_2

SHUNT d 0.01'rr Mn, WIRE

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