Mastech MS8238G User Manual

MS8238G

User's Manual

Digital Multimeter

MS8238G

CAT .I I

600V

CONTENTS

2. ....... ........... ................ 1Safety In formation

2.1 Safety S tandards................................1

1.Overview .................................................1

2.2 Pre cau tions......................................2

Warning

1.Over view

To avoi d electrical shoc k or pe rsonal injur y,
pleas e rea d all safety inform ation,warning s and
preca uti ons before using th e meter.

The MS8 238 G is a small, safe a nd re liable 3 1/2 dig it
handh eld m ultimeter. This meter can me asu re AC/DC
volta ge, D C current, res ist ance, diode, c ont inuity and
batte ry te st and non-con tac t voltage test s. This tool is
ideal f or pr ofessional s and h obbyists ali ke.

2. Safet y Informati on

2.1 Saf ety S tandards

2.3 Ele ctr ical Symbols ..............................3

3. ....... ........... .........4Descr iption and Usage

3.1 Front Pa nel.......................................4

3.2 Dis pla y ...........................................5

3.3 Usi ng th e Meter..................................6

4. ....... ........... ................ ....10Spe cifications

4.1 Gen era l Specificat ion s........................10

4.2 Techn ica l Specificat ion s ......................11

5. ....... ........... ................ .......13Maintena nce

5.1 Gen era l Maintenanc e .........................13

5.2 Rep lac ing the Batter y and F uses.............14

5.3 Rep lac ing the Probe ..........................14

01

The MS8 238 G meets the safe ty st andards UL
CSA C22. 2 No. 61010-1, CAT II 600V and a p oll ution
degre e 2.

61010 -1,

• The pr otection pro vid ed by the meter ca n onl y be
ensured if a ll safety proc edu res are strict ly fo llowed.

• The sa fety symbols o n the m eter are to advi se of
potentia l dangerous si tua tions.Caut ion i s required
when me asu ring close to th e met e’s safe ty li mits.

• Never e xce ed the protect ion l imit values in dic ated in
the specif ications for e ach r ange of measur eme nt.

WARNIN G

The sp ecial a ttent ion s hould b e paid wh en usin g the met er
beca use the i mprop er us age may c ause el ectri c shock a nd

dama ge the me ter . Th e saf et y mea sures i n commo n safet y
regu latio ns an d op era ting in struc tion sh ould be c ompli ed wi th
when u sing. I n order t o mak e fu lly u se of its f uncti ons and

ensu re safe o perat ion s pleas e compl y with th e usage i n this
sect ion car efull y. If t he e qui pment i s used in a m anner n ot
spec ified b y the man ufa cture r, the pro tecti on prov ided by t he

equi pment m ay be i mp air ed.

02

03

2.2 Pre cau tions

• To avoid e lec trical shock o r per sonal injury, observe
and fol low a ll safety prec aut ions

• Check t he me ter for damage b efo re use. Do not use i f
any dam age i s observed.

• Check t he te st leads for cra cks o r exposed wire s bef ore
using the me ter. Replace if n ece ssary.

• Ensur e the m eter works pro per ly by testing a kn own
voltage so urce first.If not w orking prope rly, the
prote cti ve equipment m ay be d amaged; have t he me ter
serviced b efore using.

• Never m eas ure voltages t hat m ay exceed the pr ote ction
limit i ndi cated on the met er.

• Always b e car eful when work ing w ith voltages a bov e
60V dc or 30V ac r ms. Keep finge rs be hind the probe
barri ers w hen making vol tag e measuremen ts.

• Make su re th e test leads are i n the c orrect input j ack s
before mea surement.

• Do not ex pos e the meter to exp los ive gas, dust or v apo r.

• When co nne cting the test l ead s to a measureme nt
circu it, c onnect the com mon l ead first, the n the l ive lead.
Rever se wh en disconnec tin g.

• Turn off power to circu it an d discharge al l cap acitors
before mak ing resistan ce, c ontinuity or d iod e
measu rem ents.

• In orde r to av oid incorrec t DC vo ltage readin gs, c heck
the circui t for AC voltage fi rst , then put the meter in t he
appro pri ate DC voltage r ang e.

• Turn off circuit powe r and c heck fused bef ore c onnect
the lea ds wh en measuring c urr ent.Turn circuit po wer
on after mak ing connecti on.

• Never u se th e meter unless t he ba ck cover is in pla ce
and fasten ed securely.

• When th e low b attery indic ato r“ ”is display ed, r eplace
the batter y.The accura cy of the meter canno t be
guara nte ed while the low b att ery indicato r is on .

• Befor e ope ning the case, a lwa ys disconnec t tes t leads
from all ene rgized circu its .

• For con tin ued protecti on ag ainst fire, re pla ce fuse only
with the spe cified volta ge an d current rati ngs l isted in
the manual .

2.3 Electr ical Symbols

Important safety information. Read the manual.

High voltage with danger.

Ground.

Double Insulation (Class II safety equipment).

Fuse m ust be re place d as pe r th e spe cific ation h erein .

Acco rd with t he rela ted E U laws an d regul ation s

AC (Al terna ting Cu rre nt)

DC (Direct Current)

Conf orms to U L STD 61 010 -1 ;
Cert ified t o CSA STD C2 2.2 N O. 610 10-1

This p roduc t has bee n tes te d to th e requi remen ts
of CAN /CSA C22 .2 NO.6 101 0-1,s econd e ditio n,
incl uding Am end me nt 1.

CAT II (Measurement category ll): it is for measurements
performed on circuits directly connected to the low voltage
installation.