D I G I TA L M U LT I M E T E R O P E R AT I O N M A N U A L
1 . G E N E R A L
Th e in st ru me nt is a st ab le a nd hi gh perf o r man ce di gi t al mul ti me te r d ri v en
b y b at te r y. It u se s t he L C D wi th 32 mm h i gh mak e t he r ea di ng i s cl ea rl y.
An d t he f u nc ti on of bac k li gh t a nd ov erl oa d pr ote ct io n mak e o pe ra ti on i s
co nv en ie nt.
Th e i ns tr u me nt h as th e f u nc ti on o f mea su ri ng D C V, A CV, DC A, A C A,
res is ta nc e, ca pa ci t anc e, d io de ,t ri od e a nd co nt in ui t y t est . Th e i ns tr u me nt
tak es d ua l- in te gr al A /D c on ve rt er as ke y p o in t, is a n ex cel le nt t oo ls .
2 . S A F E T Y N O T E S
Th is met er me e ts t he st an da rd of IE C 10 10 . Re ad i t bef o re op er at io n.
1
.
D o n ot i np ut t he li mi te d v ol ta ge of 10 00 V DC or 75 0V A C p ea k v al ue
wh en mea su ri ng v olt ag e.
2
.
Vo lt ag e le ss t ha n 36 V is s af et y v o lta ge . Wh e n me as u rin g v olt ag e hi gh e r
tha n 36 V DC , 25 V A C , c he ck t he co nn ect io n, i ns ul a tio n of te st l ea ds
to av oi d el ec tr ic s ho ck .
3
.
Whe n ch an gi n g f un ct io n an d ra n ge, t es t le ad s sh ou ld be r e mo ve d f ro m
tes ti ng p oi nt .
4
.
S el ec t c or re ct f unct io n an d ra ng e .
5
.
Whe n me asur i ng c urr en t, d o no t in pu t c ur re nt o ve r 20 A.
6
.
S af et y s ymb o l s
“
” ex is ts h ig h v olt ag e
,
“
”G ND
,
“
” du al i ns ul at io n
,
“
” mu st
ref er t o ma nu al
,
“
”lo w b att er y
3 . S P E C I F I C AT I O N
1
.
G EN ER A L
1- 1
.
D is pl a yi n g : LC D di sp la yi n g
1- 2
.
M ax . in di ca t io n: 1 99 9
(
3 1 /2
)
, a ut o po la ri t y i nd ica ti o n
1- 3
.
M ea su ri ng meth o d: d ual s lo pe A/ D tra n sf er
1- 4
.
Sa mpl in g ra t e: ap pr ox . 3 ti me s/ sec
1- 5
.
O ve r r an ge i nd ica ti o n: M SD d i sp la ys “1 ” or “- 1”
1- 6
.
L ow b at te r y in dic at io n: “
” s ym bo l di sp la ys
1- 7
.
O pe ra ti on : 0
~
40
℃
,
r el at iv e hu mi di t y < 80 %
St or ag e: -1 0
~
50
℃
,
r el at iv e hu mi dit y < 8 0 %
1- 8
.
P ow er
:
on e 9V b at ter y ( N E DA 16 04 /6 F2 2 or e qu i val en t
)
1- 9
.
M ea s. :
(
1 85 ×9 3× 35
)
mm
1- 10
.
We i gh t: ap pr ox. 2 9 0g
(
in cl u di ng b att er y
)
1-11
.
Ac ce ss or ie s : ma nu al , g if t bo x, ho ls ter, t es t le ad s. 9V b at ter y.
2
.
T E C H N I C A L D ATA
2- 1
.
Ac cu ra c y: ±
(
RD G% + t he l ow e st di gi t
)
at 2 3± 5
, <7 5% Rh o ne ye ar
℃
gu ara nt ee f ro m pr od uc ti on d ate
2- 2
.
T EC HN I CA L D ATA
2- 2-1 . DC V
Ra ng e Ac cur ac y
Re so lu ti on
20 0 mV 0. 1 mV
2V 1 mV
20 V 10 mV
20 0V
±( 0.5% +3)
10 0 mV
10 00 V ±( 1. 0% +3)
1V
In pu t r es is ta nc e
:
all r an ge s: 1 0M
Ω
Ov erl oa d pr ot ec ti on : 2 0 0 mV ra ng e: 25 0 V DC o r A C pe ak v al ue , ot he r
ran ge : 10 0 0V D C or A C pe ak v al ue
2- 2-2 AC V
Ra ng e Ac cur ac y
Re so lu ti on
2V 1 mV
20 V 10 mV
20 0V
±( 0.8% +5)
10 0 mV
750V ±( 1.2% +5)
1V
In pu t r es is ta nc e: 1M
Ω
f o r i np ut r a ng e 2 00 mV a nd 2 V, 10 M
Ω
f or o th e r
ran ge s.
Ov erl oa d pr ot ec ti on : 2 0 0 mV ra ng e: 25 0 V DC o r A C pe ak v al ue , ot he r
ran ge : 10 0 0V D C or A C pe ak v al ue
Fr eq ue nc y r e sp on se: lo we r t ha n 2 00 V ra n ge: 40 ~ 4 00 Hz
,
7 00 V r an ge:
40 ~20 0H z
Di sp la yi n g : r ms of si ne w av e( mea n val ue r es po ns e)
2- 2-3
.
D CA
Ra ng e Ac cur ac y
Re so lu ti on
20 0u A 0. 1u A
2 mA 1u A
20 mA
±( 0.8% +3)
10 uA
200 mA ±( 1.2% +4 )
10 0uA
20A ±( 2.0% +5 )
10 mA
Ma x. mea su ri ng v olt ag e dr op : 20 0 m V
;
Ma x. i np ut c urr en t : 2 0 A
(
w it hi n 10 sec .
)
Ov erl oa d pr ot ec ti o n: 0. 2A / 2 50 V f ast -b lo w n f us e, 2 0 A inf u se d.
2- 2-4 . A CA
Ra ng e Ac cur ac y
Re so lu ti on
20mA ±( 1.0% +5)
10 uA
200 mA ±( 2.0% +5 )
10 0uA
20A ±( 3.0% +10)
10 mA
Ma x. mea su ri ng v olt ag e dr op :2 0 0 mV
Ma x. i np ut c urr en t : 2 0 Al es s t ha n 1 0s ec.
)
Ov erl oa d pr ot ec ti o n: 0. 2 A / 25 0V f us ed, 2 0 A r an ge i nf u se d
Fr eq ue nc y r es po n s e: 40 ~2 00 Hz
;
Di sp la yi n g : r ms of si ne w av e( me an v alu e re sp on se
)
2- 2-5
.
R es is ta nc e
(
Ω
)
Ra ng e Ac cur ac y
Re so lu ti on
20 0
Ω
±( 0.8% +5)
0.1
Ω
2k
Ω
1
Ω
20 k
Ω
10
Ω
20 0k
Ω
10 0
Ω
2M
Ω
±( 0.8% +3)
1k
Ω
20 M
Ω
±( 1.0% +15)
10k
Ω
20 0M
Ω
±[ 5% (r ea ding –10 ) +
20 ]
10 0k
Ω
Op en v ol ta ge : l e ss th an 3 V
Ov erl oa d pr ot ec ti o n: 2 50 V DC o r AC pe ak v al ue
NO TE : a
:
A t 2 00
Ω
ra ng e, i t s ho ul d mak e th e te st l ea ds s ho rt t o me as ur e
the wir e re si st an ce , t he n, s ub tr ac ts f r o m t he re al mea su re me nt.
b
:
A t 20 0 M
Ω
ra n ge, ma ke th e te st l ead s sh or t, L C D di sp la ys 1. 0 M
Ω
,
it’s n or ma l a nd ha s no eff ect on t he ac cu ra c y a nd s h ou ld b e
su btr ac te d f r o m r e al me asur e me nt.
2- 2-6 . C APAC I TA NC E
Ra ng e Ac cur ac y
Re so lu ti on
20 nF 10 pF
200nF 100pF
2uF
±( 2.0% +20)
1nF
200uF ±( 2.5% +20)
100nF
Me as ur in g f re qu en c y
:
1 2 0H z
Ov erl oa d pr ot ec ti o n: 3 6V D C or A C pea k va lu e
2- 2-7 . DI O DE A N D CO NT IN UI T Y T ES T
RA NG E
DI SP LAYI N G VA LU E
TE ST
CO ND IT IO N
Fo rw ar d vo lta ge d ro p of
di od e
Fo rw ar d D CA is
ap pr ox. 1 mA
,
bac k war d
vo lta ge is
ap pr ox. 3 V
If t he re si sta nc e i s
les s t ha n 70
Ω
±2 0
Ω
,
bu zze r so un ds
Op en v ol ta ge is
ap pr ox. 3 V
Ov erl oa d pr ot ec ti o n: 2 50 V DC o r AC pe ak v al ue .
Wa rn in g: d o no t in pu t vo lta ge a t th is ra ng e!
2- 2-8 . T RA NSISTOR h FE D ATA T E ST
RA NG E
DI SP LAYI N G
RA NG E
TE ST IN G C ON DI TI ON
hFE N PN
or PNP
0 ~ 10 0 0
Ba si c c ur re nt i s ap pr ox. 1 0 uA
,
Vc e i s ap pr ox . 3 V
4 . O P E R AT I O N
4 - 1
.
PA N E L D E S C R I P T I O N
1- 1
.
L CD : d is pl a y t h e mea su ri ng val ue an d
un it.
1- 2
.
F un ct io n sw i tch
;
1- 2-1
.
P O WE R ke y
:
t u r n on a nd t ur n off .
1- 2-2
.
H OL D k e y: pr ess it , t he p re s ent va lu e
is ho ld o n L C D a nd “ H ” s ymb o l di sp la ys .
Pr es s i t ag ai n, “ H ” s ymb ol d is ap pea rs , an d
the me ter e xi st s th e h ol d mo d e.
1- 2-3 B/ L ke y: t ur n on /off ba ck l ig ht .
1- 3
.
h FE h ol e: t o me as ur e hFE of tr i od e
1- 4
.
R an ge k no b: to s el ec t me as ur i ng f unc ti o n a nd r a ng e.
;
1- 5
.
C APA CI TAN CE
(
C x
)
O R I ND UC TAN C E( Lx ) C OM :
;
1- 6
.
Vol ta ge
、
re s ist an ce , cu rr en t, G ND C OM
;
1- 7
.
Ba tt er y C a s e.
;
Se e t he p h ot o.
:
4 - 2 . D C V m e a s u r m e n t
2- 1
.
A pp l y t he b l ack t es t le ad t o “ C OM” te r min al a nd the r ed o ne t o V/
Ω
ter mi n al.
2- 2
.
S et t he kn o b to a p ro pe r D C V ra n ge, co nn ec t t he bl ac k t es t le ad
cro ss l y t o t he c ir cui t un de r t es te d, th e vo lta ge a nd po lar it y of th e
po in t wh ic h th e r e d l ea d co nn ec t to wi ll di s pla y o n LC D.
NO TE :