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lnstructions for Mu ltltester US-101
Fo atures :
1. l\-!t:tcr O\·crlo;_td pro-

,

,·

ldcnlific;.ttion of princip~1l parts

l t.'Ction is providtd. 2. No fr ic rion ù~vc:lop.

r~r·u : .\ l(lk

....,

~ 1 1-tt:

es ~J s a n1ctcr :;hock- -.:._.,,1.1: n1'· µrcx>f rlevicc is µro - ·
vidc"
·
B.: . t: r

3. No contact rcsi.stancc dcvelors as a spt·

...(':.-\ll..f ' 1) 011 \1~
J<

oc .

l A· 10\' UI·- ..
· · AC l ~" O;
cial ..:ircuit i:; used
(or l hc rornry S\Vit-

\· 1111 ~·
UF.Tf.R Zt:WU 'lii
- ~ · -"

ch. For this rcason,
atabilized indicat ion

is

ah,·ay~ obtaincd.

tr..O-\'; ~~ T r.llML'l;,\L
T F.R}ll~.,L

·I. " l'fu.· frequt·ncy cha.

, ·J

AhJ

.e,,,,.

UtlT N lT

r;.t cttristics havc· come
cau~
exc~ llc.nl

oc.
bcCl),,_ Tf.R)11"".U .lv, O· aA 'IJF:RJ.ll'SAL

of the use of

l__~t)T.\ff'I'

S\\ ITCll

K~OH

d iodl'S. 5. DC t;ircuit polarity S\vitch is providcd . ).·1i:asur.:rn~nt;;, thcrcfor~. art: possihlt: \\'Ìthout auy dauger o f error f'Vt:n \\'hcn tht~ polarit y o f t hc circuit u nd'c r n1easu rcn1cnt is u11kno\\'n. 6. :\ c.:arry ing handlt: is provided. l itìliziug l his luu1ùlt'". Lhc dcvicc can be set up
~t an inclhtt! of 30 .. or 40'\ thus faci.litating scale reading. /., 1 s t hc n'1c tcr 7.C.ro adjuslt:r i~ of Jargt:r sizt:, a
J!,Pdial~

·

JEMCO INOUSTRE IES ., l TD.

Spe clflcotlons :
J. Sensiti\'ity:

2. Range :

20.000 0 11111;; per voit ne 5.000 Ohms per volt AC DC volt:ige: 0-0.25. 1 2.!i. IO, :.O, 250. l,OOOV AC vo1ta1:e: 0-2.5, lO, 50. 2:,0, 1.ooov DC micro~mp.: O-co()1·A (250mV dro.p) DC milliamp. : 0- 1. 2ii, ;,oomA {250m V drop Resi":ince: o-50:vlll
Rn nge Centcr se.ile

3. Uimt!nsions:
~.

(0-5K!)) 50'!'! (0-501\H) f.OO!l. R x 100 t0-500Kf!) foK!l. R x lk ( 0-fo~ln ) SOK!l. R x !Ok (0 - 50:>1H ; f.OOK!l. il)e<:ihds: -:!O- I 10, I 22, T 36. +50<111 OI{ X 10

R x l

=

0.5 ki: (U lbs) 5. ~'le ter scnsitiv ity: 45pA

Wcight :

'

.
1

,

'

,
P r.ocautlo n s in Opo ration
~

L Set thc rnctcr Zero positioni accurately. 1\l.ljustn1cnls can he made h>· tur ning the knohs uniquc to this inslrumt!nt
\Vi-th }'OUli f-Ìll$.:CTS .

,·

2. :\fa ke sure th·at the polarity switeh in F iJ.:. 1 is .et at +DC · ACV ·Oll~IS. 3 Set the red test l~ad to the ( +) side and llw black kad
lo ~hc

COM ( -) s idc.
1ue~1sur,c.

4. \\'hen a n u nk no\\.'n voltage o r currcnt is to be tnl'àsurcll, takc thc

rnl.'nt by scttin}{ thc knoU o( the rotary S\vitch in Fi·g . t nt thc n1axi1n un\ ' ranJ.:C, and thcn Kraduall > S\i.·itch -ovcr to the optin1un1 range.

5. Rcn1ove thc

Oat ter ie~

frorn thc holdcr \vithout fai) \\·hen the 1neter is not

cxpected to he us_o.od for sontc ti1nc. Measurement of DC Voltage

L Set lhc knob o{ thc rmary switch in f ii:. I to thc VDC range. C<>nnecl thc red lcad· to thc ( + ) sidc and thc black lcad to the ( - ) sid~ (ground wirc or ch·ssis) and thcn takc mcasurcment. Jt, by chance. thc indic;itor should swing in the re verse direction. chani:c tl'1 polarily switch in F ig. I to· the (-) c
Sidc. ~!CaSUtCOlClll \Vili

IJc pOSsilJIC lhCll.

Rcad thc li>C SC
' Range '·- - - isont \'

Scale

usce~

Measurcd value Jndicatcd value x 0.01

o~
- -

25
IO

1 V
2.5
V

-

O~

o~

25

·L _
'

I

'

X

O.I

X O .I

I
I
'

10 V

o·~
o~

10·
5.
25

1

so
250

V
V

o ,. ., ,
o~

I

- 1,000 V 10·

I
I

-

2 -

:!. ~fCJCiU14.!Jllt!IH of \'Oft:1j.te'l hcl0\\ :!';~,Un\ \'
0

U ntikc-

convcntlnnal

instrunl~nts

of similar USf', the (rtqucncy char.ictcni:.ctc,

S~t ·thc roiary swi 1d1 knuh in F11t. I 10 2·.001 \" 011 thc- Vl>C r:111i:e. :111d set t hc

rl'
10

fiO:·A Z50m\") tcrminnl. Whrn n · 1>.,.;1nl 5011:\ (250111 V) terminal

of thls dcv ice ~re cxccllcn1 bcc.'uPowor Output Rcodlng

i~ lL ~d to n1casurc :\ voh..tJ:c 11n1 111clorlc'1 111 tlu· VOC r..tnt:r- oC thls ins.tru.
u1en1, co1uH·ct 111 serre~ thc
~250nl\' )

w ovcrload h.

eE VJ 100 \'

O.~r.<''

· x. 20 i.u> resistor tu thc 50111\

ll·rrninnl.

E~n~1µlc:

EV
I

~

IOO \") - 0.:!5 \"

I X

20 w '

-

1,995

~Q)

In nu~.i\Surini: tow.frcquency \'Oltnf::CS, inserc on~ rc~clc.-.1c.J in OU'f PU1' ttr1nit\al to cui ofl r>C l'or1ion. Thcn use the VAC rnngc.
Convcrl t he low.frc"<)uc ncy powcr o n thc basi· or the low frcqucnc)" \'Oltnge dication :111d Table 'I.
lii

M oosuromo nt of DC Curront

T aùle I.
1. S.-1 t hc rotary ·wì1c h knob i11 Fi1t. I to the 1111\ rnngc. C
:_!. ou~
Q

o~

1..!

2 ' :1 ' 4 - 5 - G - 1 -' -'-

s

9

-1~

I
I

2. In m eosuri1111 currcnts bclow 5011t\, s.:t thc re3. In mc;isurini: IO;\ DC. 11rt 1hc rorn1y s wi1ch knob 111 Fii:. I 10 IO;\ L>C nnd

I mW I 1.0 I 1.26 1 1.53 2.0

- - -· -

2.5 3.16 3.9ll 5.01 6.31 7.91 IO.O I
4

~

1 I -08 _ () . I

2

3

r.

G

~

8

9

I~

r.'
M eosuroment of AC Voltogo

·I
~1rasurcd

mW , I O: 08 0.63 1 0.5 O. I 0.:12 0.2:. 0.2 O.IG 0.13 O.I 1

T3ble I shows the case hctwc'<'n the basi· of Tnùle 2. Tnblc 2.

.r IOdll

-----------~I
Examplc :

In othcr c·'k". conver~ion ls mode on

S.,1 thc rotJry ·witch knoh 111 F111. 1 10 thc \I AC rnn11c. In me.1s11rin11 vol1agcs nbovc 10\", rcad 1hc 10\li\C UI' scak. bul in 111cal~:UlJ.tf'

r- - l

ua

2.!i \"

-

Scolc u..-d

vnlue

- 20 -

- -I -Il
+l Q
-

-

;.w - -I
X O .I X 10 X 100 X 1.000 X 10,000
X

C.1se or + 25cll3 S 161 .,WI X 100 '- 316'"'"''

25 AC 01'1.Y
IOVAC Ul'0....,10

lndicntcd vnluc x

10 \I
50 V

-

------- - - ,,
1.000 \"

250 V

· -- ·

,, o,..,.. 5
· 0-25

.-

·
· ·

·
·

X

-

I
-

:- I-;; !
+31

I

-1

1-21 _ +30 ·

-

·

-x l O
x l OO

X IO

-

~

-

+40 I +50 I

·
-

0-10

I

---------

·

·

- - -1 _...'." ~: _'.:00

+ 41 -

100.000 J ---

3 -

4-

Dc cl bol Re adl ng
Il i!S donc in thc

s.imc manncr as the po"'·cr output rc:iding.

Thc d8 sçalc o( thi· in·trument is bascd on the case nf Oc1B- lmW ( =0.775V) 600.n In case thc volta~e o f the point to be measur«I i· he!ow 2.5V. takc direct rcadin~ of thc scale, but if thc voltagc is highcr than 2.SV. thc indicate·/\00. OR

i\IS<>. if 250V DC p0wcr supply is cnnncctcd L thc 2SOV DC range, and if O OHMS scale is read at Rx IOOk alter matchini: the O Ohm (250V OC max) and connecting thc. rcsistance to be rnc.isurcd in ~ries. it \\·ili be po:ssiblc to mca::surc insulation rcsistanct:. and hìuh rcsistance.
Note I.: Care is nccde2. Rcplace battcrics in thc event i cro ohm adjust does not movc

2.5 V IO V

TOTA!.

ou_ I

pointer to zero.

2. Diodc and Tr.insistor Checkini:

o
12

.

,, IO

+

22

I

:..
I

50 V
250 V

-40

26

-

+

36

Uiodcs and trnnsistors arcchekcd by utiliiing R x l k. R X 100. R x IO. and R X I. of thc resistance range. The po!arity of thc tiP" of test lcads chani:es from COM ( - ) t · ( + ) and from V- !l- mA C t ) 10 ( - ) . ·rhe ehi..·cking methud is thc sante as r~shnancc n1casurcment. but \\.·ith this instrumcnt. thc load voltai:e is 3V, thc lood currcnt is a· shown in Table ~ and thc scale is com·erted from 50t·A OC. ·rablc 4. Rani:c l.oad Currcnt
Cun' c~ion rate

I 50 I 62

1.000 V

I

52

I

I

I ~
,

- -

-651·"

R " IK
R x 100

50/'l\ sçalcs

X X

1.3
J.:J
U

-1
I I

6501"'
6.SmA 65mA

I
I

500ttt\

·

-l
I

M e a1uromont of Rosl stanco

R

X

IO

Sn11 · \ 501nf\

X X

R x I
I. Refore taking mcasurement.
,

I

l.:l

adjust

on AUJ. in 1-'i~. I so that the indicator will p0inl a ccurately to O.
Note : that do not exceed the r:at~ valucs of fhc currcuts in thc ·tandard tistun. »hould be selec1ed.
Rang~

A· thc scale is l>.'\Sed on thc case of R x I. rcad it ·· fnllnws: i\t R x IO. 10 timcs thc indicate
Printed in Japan

-5 -

- 6