Mastech ms5908 Operation Manual
Ω
TEST
mA
VA
ms
Hz%
VA
ms
%
AC
L - N
L - E
N - E
Peak
Z - L
Z - N
Z - E
ASCC
12 A 15 A 20 A
HOLD
N
E
L
V Vd Z
RCD
GFCI
MS5908
Circuit Analyzer
Operation Manual
01 02
General Instructions
This ci rcuit ana lyzer is a sp ecial tes t device
desig ned for AC low -voltag e distrib ution lin e quick
fault l ocation . With simp le operat ion, accu rate
measu rement an d other fea tures, it c an detect
multi ple probl ems on a line , such as cau sing to
elect ric shock , electri cal fire, a bnormal o peratio n
of equi pment, et c.
Functions:
• TRMS me asuring AC v oltage
Artif icial loa d 12A, 15A, 2 0A measuri ng line dro p
Measu ring phas e voltage , neutral l ine (zero l ine)
volta ge to earth , peak volt age, freq uency
Measu ring phas e (live lin e), neutr al line (ze ro line),
earth l ine condu ctor impe dance
Ident ifying 3- wire sock et connec tion mode ( zero
for lef t and live fo r right, ha ving eart h line or not )
Test the re liabili ty of resid ual curre nt device ( RCD)
and res ponse act ion time
Test the re liabili ty of GFCI ac tion and re sponse
actio n time
Backl ight func tion and da ta hold fun ction
•
•
•
•
•
•
•
Warning
Do not us e this inst rument wi thout rea ding,
under standin g and follo wing the in structi ons
in this m anual. Re ad and foll ow them car efully,
as well a s all warni ngs and ins tructio ns marked
on the in strumen t!
To prev ent damag es to the ins trument , it should
not be us ed for meas uring the o utput of UP S
equip ment, nor f or measur ing adjus table lig ht
and squ are wave ge nerator !
For mea suremen t accuren cy during r epeated
usage , allow at le ast 30 seco nds betwe en two
conse cutive me asureme nts to faci litate
equip ment cool ing when me asuring v oltage
drop an d cable imp edance.
To ensu re accura te measur ement dat a, please
check w hether th ere is impo rtant loa d or heavy
load in t he line bef ore testi ng. Turn of f the heavy
load, i f necessa ry, then re test.
03 04
1. Input for testing
2. Display
3. Power switch key “ ”
4. Main test item selection key “ ”
5. Data hold key “ ”
6. Backlight function key “ ”
7. Sub test item up selection key “ ”
8. Sub test item down selection key “ ”
9. Test key “ ”
Ω
TEST
mA
VA
ms
Hz%
VA
ms
%
AC
L - N
L - E
N - E
Peak
Z - L
Z - N
Z - E
ASCC
12 A 15 A 20 A
HOLD
N
E
L
V Vd Z
RCD
GFCI
1
2
3
4
5
6
7
8
9
FRO N T PANE L
05 06
L - N N - E
Peak
Volta ge (V ): eal ti me displa y of cable co nnectio n
statu s and displ ay the volt age drop of c urrent lo ad
and mea suremen t results o f phase vol tage drop
TRMS. This test i tem inclu des 3 subme nus, name ly
load wi th 12A, 15A an d 20A. Pres s Up “ ”or Down
“ ” selec tion key on t he sub test i tem to ente r the
relev ant test it em.
One ana log load ca n be added to l ive line (p hase
line) a nd zero lin e (neutra l line) for t he analys er
to meas ure the vol tage drop , and then ca lculate t he
volta ge drop of 12 A, 15A and 20A lo ad separa tely.
Under t he approp riate tes t functio n, press th e test
key “ ” to te st.
d
Menu Operation
The mai n test item s of the anal yser are lo cated on
the bot tom of disp lay, incl uding fiv e test item s,
namel y: voltag e (V), volt age drop (V d),
imped ance (Z), R CD and GFCI . Press the m ain test
item se lection k ey “ ” to selec t relevan t test item .
V Vd Z
RCD
GFCI
Volta ge (V): rea l time disp lay of TRMS of pha se
volta ge, wirin g status an d frequen cy. This test it em
inclu des 3 subme nus, name ly phase vo ltage (L_ N)
TRMS, v oltage to e arth of neu tral line ( zero line )
(N_E) TRMS, pea k voltage ( Peak). Pr ess Up “ ”
or Down “ ” selecti on key on the s ub test ite m to
enter t he releva nt test ite m.
07 0 8
Z - L Z - N Z - E
ASCC
RCD: re al time dis play of lin e connect ion statu s,
and dis play curr ent RCD tri gger curr ent and tri p
time. The analy ser simul ates curr ent great er than
30mA bet ween live l ine and ear th line to te st the
perfo rmance of r esidual c urrent de vice. Pre ss the
test ke y “ ”to test.
GFCI: r eal time di splay of li ne connec tion stat us,
and dis play curr ent GFCI tr igger cur rent and tr ip
time. " GFCI" (Gr ound Faul t Circuit I nterrup ter) is
a fault l eakage pr otector t o earth. The tester
simul ates curr ent great er than 5mA be tween liv e
line an d earth lin e to test the p erforma nce of GFCI .
Press t he test key “ ” t o test.
12 A 15 A 20 A
Imped ance (Z): r eal time di splay of li ne connec tion
statu s and frequ ency, and d isplay of t he impeda nce
test re sults. This test it em includ es 4 submen us,
namel y phase lin e (live lin e), condu ctor impe dance
(Z_L) , neutral l ine (zero l ine) cond uctor imp edance
(Z_N) , erath lin e conduct or impeda nce (Z_E) ,
avail able shor t-circu it curren t (ASCC). P ress Up
“ ”or Dow n “ ” selecti on key on the s ub test
item to e nter the re levant te st item.
The Ava ilable Sh ort-Cir cuit Curr ent (ASCC ) feature
can mea sure the cu rrent pas sing thro ugh break er
when th e lines are c omplete ly short- circuit ed.
Under t he approp riate tes t functio n, press th e test
key “ ” to te st.
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