Tequipment M-3850D Manual de usuario

AUTO/MANUAL RANGE DUAL-DISPLAY

OIGITAL MULTIMETER

OWNER'S MANUAL

DUAL DISPLAY DIGITAL

MUlTIMEIER

With PC lnlerfoce

M-385OD,/ M-386OD(True rms) /

M-3870D

((A

FAMAI.IARIZATION

1. Power Bulton

2. Function Butlon

3, SET/RESET BUttON

4. Dc §rAC td Button

5. UP Button

6. DOWN Button

7. Back-Light Button

8. Transistor Socket

9. Capacitance/lnductance Socket

Temperature

10. Rotary Funclion Selector Swtch

11. 20A Teminal

12. mA Terminal

13. CO[, Terminal

14. V/O Terminal

15. LCD (3 3/4 Digit irax. 3999)

16. Bargraph Scale

17. Analog Bargraph

26 19 20 2131

27 2829 30

'1 8. Overload lndication

19. Auto-Hold

20. Dual

21. Pulse

22. Data-Hold

23. [4inium

24. I\ra(imum

25. Relative

26. Comparison

27- Rang+Hold

28. Extra

29. Memory

30. Memory Recall .

31. Number ofthe Memory

32. lnductance

33. Diode

34. Continuity

35. Altemative Volt or Current

36. Negative Polarity

37. Frequency

38. Temp€rature

39. Capacitance

40. Transistor hFE

41. Logic Test

42. Secondary DisPlaY

43. Low Battery lndication

44. Decibel

45. Annucìators

'ff8.ffi.8

1"',,,,,,f,,,,,"'fr ,,,r,,,t,,,r,,'if

CONTENIS

1 - lnlroduction

6-5. Continuity Testìng ..

6-6. Checkrng Diodes

6-8 Checkng Transistors

6-9. Measunng TemPerature ....... . ........ ' """ '

6-10 checking Signal Oulput.. . . ..... . ........ ' """ "

6-1'1. lnductance test. . .

6-12 Measunng Curaent

6-13. lJsing lhe Meterwith a Computer........ ' ""

7 Care and Maintenance

7-1. Replacing the Fuse

7-2 GeneralMainlenance

8. Specifications

8-1 General Characteristics .... . .......

8-2. Special Characterislics . . ....... ...... . . .....

Due to our policy to refine the products continuously, this

manual may contain minor differences in specmcation,

components, parts and chcuit deggn of ihe instrument

actually delivered.

l. lntoduclion

W h this Digital multìmeter, you have acqtired a

high-quality, povirerful performance, heavy-duty

rugged and handheld multimeter that will give

you confidence and peace of mind in your every

measuring iob.

Please read these operating instruclions very

carefully. beforc commencing your measure-

2. Sotety Iniomotlon

2-1. Sofety roqullomenl§

This meter has been manufaclured and

testèd in accodance with lEC1010l/

EN6|01G1 Paft'l: Safety Requirement for

Electrical Equipment for measuremeni,

controland laboratory use, Safety Class ll,

Overvoltage category ll.

This manual @nlains information and

warnings which must be observed to as-

sure safe operation and maintaìn th6

meler in safe condition

2-2. Sofely symbols

The following symbols have been placed

on lhe meter to remind you of measure-

menl limitations and safety.

204 The maximum current lhat you

can measure at thi§ terminal is

2oamps DC/AC. This terminal

is fuse protected. l/Vhen using

this lange with high current,

keep the duty cycle to 30 sec-

onds on load, 15 minute§ off

load.

The maximum curreni that you

can measurc with this terminal

is 4mA or 400m4 DC/AC. This

terminal is protecled by a

80omA fuse.

MAX

+ soov

MAX

= r000v

750V

To avoid olectric shock or in-

strument damage, do not con-

nect the common lnput

Terminal COM to any source of

more than 500 volts with re-

spect to earth/ground.

The maximum voltage this

meter can measure is '1000v

DC or 750V AC.

Be exceptionally careful when

measuring high voltages. DO

NOT TOUCH THE TERI\4I-

NALS OR PROBE ENDS.

Refer to lhe complete operating

instruc'tions.

lndicates protection clas§ ll,

double insulation.

2-3. Sofety Wqmlngs

2-3-1- To prevent ebcaic shock hazard

and/or damage to the meter, do not

attempt to measurc voltage exceeding

1000V DC or 750V AC.

2-3-2. To avoid damage to the méter and/or

iniury, obseNe the inPut limits as

stated in Table 1.

2-3-3. lo avoid damage to the mèter. dis-

connect test lead§ from test points be_

fore changing the functionfange.

2-3-4. To avoid electric shock, be careful

when working above 60V DC 25V AC.

Such voltage Pose a §hock hazard.

NOT FOR HIGH ENERGY INDUSTRIAL USE,

2-$5. The 20A range is prolected by a fuse.

To avoid damage or injury. use thè

meter only in circuits limits by fuse or

circuits-breaker to 20A or 4000VA. Do

not apply voltage to between 204 or

mA and COM terminals. This warning

is lo assure protection against injury

and/or damage to the meter and the

user.

2-&6. Do not gel lhe meter and test leads

2-3-7. Ensure the test leads are in good con-

diiion

Table 1 INPUT LlirlTS

Worning:Sources like smallhand-held radio lransceivers, fixed stalion radio and lelevision lrah-

smitters, vehicle radio lransmjtlers and cellular phones genèrate electromagneiic radiation that

may induce voltages in the test leads of lhe multimeter In such cases lhe accuracy of the multi-

meter cannot be guaranteed due to physical reasons.

FUNCTION TERMINAL INPUT LIMII

VDC V/E' +COM l OOOV DC

v/o +cotM 750VAC

o t"» V/Q +COM 25OV DC/AC

MA DC/AC mA+COi, 400m4 DC/AC

2OA DC/AC 204+COM 2OA DC/AC

--l<- V/o +CO[/l 250V DC/AC

Freq. v/§, +coM 75OV DC/AC

Loqic V/o +CO[,| 250V DC/AC

3-t. tnstolllng lhe Bqfièry

Your meter rcquires a 9V battery for power.

The Éj symbol appears when the battery

voltage drops to certain limits. For correct opera_

tìon, replace the battery as soon as possible.

Continued use with a low battery will lead to er_

rors in readings,

WARNING : TO AVOID ELECTRIC SHOCK,

DISCONNECI BOTH LEADS FROM ANY

EQUIPI\4ENT BEFORE YOU REMOVE OR IN-

STALL THE BATTERY,

Followthese steps to installthe battery.

1. Turn off the power and disconnect the two

test leads.

2. Remove the screw to open the battery com_

PREPARING FOR OPERATION

3. Place ihe battery inside the insulation cap_

sule and snap it onto Place.

WARNING:DO NOT DISCARD THE PRO-

VIDED BATTERY INSULATION CAPSULE, IF

YOU DO NOT USE THIS INSULATION CAP.

SULE PROPERLY, lT ÀIlGHl CAUSE DAI/I-

AGE OR INJURY.

4. Replace the battery compartment cover and

the screw.

WARNING : DO NOT OPERATE THE iTETER

UNTIL YOU REPLACE THE BATTERY AND

CLOSE THE BATTERY COMPARTMENT

COVER,

Remove the screw to open the battery com-

3"2. Using the Iesl Probes

Use only the type of test probes supplaed with

your meter. The§e test probes are rated for '1 200

3-3. Uslng the Slond

Use your meteis stand to prop up or hang the

meter.

Propping Up the Meter

lf you prop ihe meter on a benchtop, the stand

helps provide a better viewìng angle. To use the

stand as a prop, iust open it away from lhe

meter and set iton a ffat surface.

Honglng lhe Mèter

To hang the meter, remove the §tand by press-

ing the lower parts of the stand together. Then

insertthe stand into top 2 holes.

Cauilons:

. Although the supplied test probes are rated

for 1200 volts, the maximum input voltage to

the meter is 1000V DC and 750V AC. lf you

lry to measure DC voltages above 1000V or

AC Voltages above 750V, you might damage

your meter and expose yourself to a serious

shoch hazard. Use extreme c€re when you

measure high voltages.

' Never connect the probe you plug into the

COM terminal to a source of voltage greater

than 500 volts wilh respect lo earth ground.

This creales a sedous shock hazard.

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