Mastech MS8922H Instruction Manual

Int roduc tion

The Vo ltage Test er prov ides a si mple an d fast me thod
of te sting AC a nd DC vol tage up t o 400 vol ts. It al so
has a b uzzer f uncti on.

01 02

03

MS8922H

War nin gs

•Rea d, unde rstan d and fol low the S afety R ules an d
Ope ratin g Instr uctio ns in thi s manua l befor e using
thi s instr ument .

•The t ester ’s safe ty feat ures ma y not pro tect th e user
if no t used in a ccord ance to t he manu factu rer’s
ins truct ions.

•Kee p finge rs away f rom the m etal pr obe tip s when
tak ing mea surem ents.

•Com ply wit h all saf ety cod es. Use a pprov ed pers onal
pro tecti ve equi pment w hen wor king ne ar live e lectr ical
cir cuits .

•Use c autio n on live c ircui ts. Volt ages ab ove
30V AC R MS, 42V AC p eak, or 6 0V DC pos e a shock
haz ard.

•Do no t use if th e instr ument o r test le ads app ear
dam aged.

•Veri fy test er’s op erati on by mea surin g a known v oltag e.

•Do no t use the t ester i n wet or da mp envi ronme nts or
dur ing ele ctric al stor ms.

•Do no t use the t ester n ear exp losiv e vapor s,
dus t or gass es.

•Do no t use the t ester i f it oper ates in corre ctly.
Pro tecti on may be c ompro mised .

•Do no t apply v oltag e that ex ceeds t he test er’s
max imum ra ted inp ut limi ts.

Inp ut Limi ts

Fun ction
Volt age DC, Vo ltage AC

Max imum In put

400 V

Int ernat ional S afety S ymbol s

Ind icate s impor tant sa fety in forma tion.

Dan gerou s Voltag e

Dou ble Ins ulati on, Pro tecti on Clas s II.

Thi s produ ct conf orms to U L STD
610 10-1, 6 1010- 2-030 a nd 6101 0-031

Con forms t o UL STD. 61 010-1 ,
610 10-2- 030 and 6 1010- 031; Ce rtifi ed
to CS A STD C 22.2 NO . 61010 -1,
610 10-2- 030 and 6 1010- 031

CAT III

Mea surem ent cat egory I II is for
mea surem ents pe rform ed in the
bui lding i nstal latio n. Exam ples ar e
mea surem ents on d istri butio n board s,
cir cuit- break ers, wi ring, i nclud ing
cab les, bu s-bar s, junc tion bo xes,
swi tches , socke t-out lets in t he fixe d
ins talla tion, a nd equi pment f or
ind ustri al use an d some ot her
equ ipmen t, for ex ample , stati onary
mot ors wit h perma nent co nnect ion to
the f ixed in stall ation .

Con forms t o relev ant Eur opean
Uni on dire ctive s

Volt ag e Test er D esc ripti on

1.Ex terna l test pr obe (-)

2.In strum ent tes t probe ( +)

3.LE Ds for vo ltage d ispla y

4.GF CI test b utton

5.Fu nctio n selec t switc h

1

2

3

Bot h direc t and alt ernat ing cur rent

00-05 -3 91 3

08

11

1009

AC/ DC Volta ge Meas ureme nts

War nin gs

Obs erve al l safet y preca ution s when wo rking o n live
vol tages .

1.Pu t the fun ction s elect s witch t o audib le.

2.Touc h the tes t probe s acros s the cir cuit be ing
mea sured .

3.Th e teste r will tu rn on aut omati cally i f the vol tage
exc eeds 12 v olts.

4.Th e LEDs wi ll indi cate th e volta ge.

5.Fo r AC vo ltage , the “+” a nd “-” LE Ds will i llumi nate.

6.Fo r DC volt age, th e “+” LED w ill ill umina te if the
ins trume nt test p robe is t ouchi ng the po sitiv e side
of th e circu it. The “ -” LED wi ll illu minat e if the
ins trume nt test p robe is t ouchi ng the ne gativ e
sid e of the ci rcuit .

7.T he buzz er will r ing whe n the Volt age is hi gher
tha n about 5 0 volts .

Volt age LED s teps
Acc uracy

±12 ,24,5 0,120 ,230, 400V

-30 % to 0% of in dicat ion

Res ponse t ime

AC fr equen cy rang e

<0. 1s

50/ 60Hz

Ope ratio n time

30 se conds m aximu m

Rec overy t ime

10 mi nutes a fter
max imum op erati on
tim e has bee n reach ed

Tempe ratur e range

14℉ to 1 31℉(-10℃ t o 55℃)

Rel ative H umidi ty

80% m aximu m

Alt itude

700 0ft(2 000m)

saf ety

CAT III 4 00V

Wei ght

98. 5g

Dim ensio n

223 *40*3 2 mm

Spe cific ation s

Mai ntena nce

1.ke ep the te ster dr y. if it get s wet, wi pe it off.

2.us e and sto re the te ster in n ormal t emper ature s.
tem perat ure ext remes c an shor ten the l ife of th e
ele ctron ic part s and dis tort or m elt pla stic pa rts.

3.ha ndle th e teste r gentl y and car efull y. dropp ing
it ca n damag e the ele ctron ic part s or the ca se.

4.ke ep the te ster cl ean. wi pe the ca se occa siona lly
wit h a damp cl oth. do n ot use ch emica ls, cle aning
sol vents , or dete rgent s.

GFC I Test

War nin gs

Obs erve al l safe ty prec autio ns when wo rking on l ive
vol tages . The GF CI test fun ction ca n onl y be use d
on 120 vo lt AC recep tacle s with GFC I prot ectio n.

1.Ch eck the ins truct ions on the s pecif ic GFCI
devi ce you are tes ting be fore pro ceedi ng.

2.Pu t the fu nctio n sel ect swi tch to GFCI te st.

3.Pr ess the tes t but ton on the GFC I rec eptac le.

The GFC I sho uld trip . If not , do not us e the
rece ptacl e and co nsult a qua lifie d ele ctric ian.
If it does tr ip, pres s the rese t butt on on the
GFCI re cepta cle.

4.I nsert on e tes t pro be into hot si de of the outl et
bein g tes ted.

5.In sert the ot her test pr obe into t he groun d of
the out let bein g tes ted.

6.Th e tes ter shou ld indic ate 120VA C if the ou tlet
is powe red and wir ed prop erly.

7.Pr ess the GFC I tes t but ton.

8.Th e ind icato r lig hts shou ld turn off in dicat ing
the GFC I has tr ipped .

9.If th e GFC I doe s not tr ip,ei ther the re cepta cle

is mis- wired or th e GFCI is def ectiv e.Do not us e
the rec eptac le and cons ult a qual ified el ectri cian.

Not e

The t ester c annot t est GFC I opera tion on 2 -wir e
(no n-gr ounde d) outl ets.

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