Mastech MS8239A User Manual
MS8239A
User's Manual
Digital Multimeter
HOLD
10A
COM
MAX
10A/ 500V
MAX
200mA/ 250V
600V MAX
600V CAT III
IEC61010-1
BAT T.
A
V
V
200
600
20m
200m
10A
200
2k
20k
200k
2M
2
20
200
600
200m
9V
1.5V
12V
MS8239A
Auto Power Off
DIGITAL MU LTIMET ER
CONTENTS
Safety Indicators..............................1
CONTENTS
Meter Appearance..............................5
Safe Working Habits..........................2
Overview..........................................1
Electric Symbols...............................4
Meter Instructions.............................5
Display..............................................5
Measuring Operation.........................7
Data Hold
DC/AC Voltage Mea surement........ .....7
..........................................7
DC Current Mea surement
Resistance M easurement
...................8
...................9
Continuity M easurement...................10
Diode Test
........................................10
Battery Test
......................................11
General Specifications.......................11
Accuracy Indicators...........................12
DC Voltage..........................................13
AC Voltage..........................................13
Resistance Measurement.....................14
Diode..................................................14
Continuity Measurement.......................14
DC Current..........................................15
Battery Test.........................................15
Maintenance.....................................15
General Maintenance...........................16
Replace Batt ery...................................16
Replace Fuse.......................................17
01
02
Overview
Safe Working Habits
To avoid el ectric shock or personal inj ury, please
read “saf ety information” and “w arning and
rela ted n otes” carefully befor e using the meter.
The MS 823 9A is a small hand-held , saf e and reliable
3.5” d igi tal multimeter with sta ble p erformance and
novel str ucture. It can be used to mea sur e DC
voltage , DC current, resistanc e, di ode forward
voltage d rop, circuit continui ty an d to test batteries.
It is an i dea l maintenance tool easi ly ca rried by a
large num ber of users.
Warning
To avoid possible electric s hock or personal injury as
well as dam age to the meter or measure d obj ects,
please us e the meter according to th e fol lowing
procedu res:
Safety Instructions
The MS 823 9A digital multimet er ha s been designed
acco rdi ng to International Ele ctr o Safety Standard
IEC- 101 0 (61010-1@IEC: 2001) conc erning safety
require ments for electronic me asu ring instruments
and hand- held digital multimeters . It meets the
require ments for CAT.III 600V of IEC1010 and g rad e
2 for po llu tion.
• Users sho uld use the meter strictl y acc ording to
the pr ovi sions of this manual. Oth erw ise, the
warr ant y for the meter may become in val id.
• The wa rni ngs in the user manual are used to r emind
user s of po ssible dangers or dange rou s actions.
• The no tes i n the user manual are to remi nd us ers
of con dit ions or actions that may ca use d amage
to the m eas ured object.
• Check the c ase before using the mete r. Don't use the
mete r wit h damaged case. Check to se e if th e case is
crac ked o r lacks plastic parts. Pl eas e pay special
atte nti on to the joint insulatin g lay er.
• Check to se e if the test wire has insula tio n damage or
bare m eta l. Check test wire contin uit y. If the wire is
dama ged , please replace it with a ne w one b efore
usin g the m eter.
• Measure k nown voltage with the met er to v erify that
the me ter i s working properly. If the met er is working
abno rma lly, stop using it immediate ly. A protec tiv e
devi ce ma y be damaged. If there is any d oub t, please
have t he me ter inspected by a qualif ied t echnician.
• Do not test v oltage exceeding rate d vol tage marked
on the m ete r.
• When t est ing voltage exceeding 3 0v AC voltage RMS,
42v AC pe ak or 60v DC, be particular ly careful to
avoi d ele ctric shock.
• When m eas uring, use correct jack , and s elect the
prop er fu nction and measuring ra nge .
• Do not use th e meter in explosive gas, v apo r or dusty
envi ron ments.
• When u sin g the probe, fingers shou ld be b ehind the
prob e pro tection device.
03
04
• When c onn ecting circuits, conn ect t he common test
line firs t, then connect the charg ed te st line. When
disc onn ecting circuits, disc onn ect the charged test
line firs t, then disconnect the co mmo n test line.
Befo re me asuring resistance, c ont inuity, and diodes,
firs t tur n off pow er and discharge all high volt age
capa cit ors.
• If the m ete r is not used in accordance w ith t he
inst ruc tions, the meter's safe ty protective function
may be com e invalid.
• For al l DC me asurements, to avoid th e ris k of
elec tri c shock, please use AC fu nction to verify the
exis ten ce of any AC voltage. Then, sele ct DC
volt age m easuring range equal to o r gre ater than
the AC me asuring range.
• Befo re me asuring current, plea se ch eck the meter
fuse , shu t off pow er to the circuit to be teste d, then
conn ect t he meter and energize the c irc uit.
• When o pen ing the case (or part of the ca se) , turn
the me ter o ff.
• When t he ba ttery low voltage indic ato r “ ”
beco mes l it, replace the battery a t onc e. A low
batt ery w ill cause meter reading e rro rs and may
resu lt in e lectric shock or person al in jury.
• Befo re op ening the case or the batte ry co ver,
remo ve th e test wire from the meter.
When m ain taining the meter, us e replacement parts
spec ifi ed by the factory.
Electric Symbo ls
Impor tant safe ty inf ormatio n
AC (Alt ernatin g Curr ent)
DC (Dir ect Curre nt)
AC or DC
Groun d wire
Fuse
Accor d with the re late d EU laws and r egulati ons
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