Mastech MS8233A Instruction Manual
CAT.II
600 V
AUTO
MAX
04
1.SAFE TY INFOR MATION
This multim et er has been desig ne d according t o IE C61010-1
concernin g el ectronic meas ur ing instrum en ts w ith an
overvolta ge c ategory (CAT II) and pollut io n 2.
Follow all sa fe ty and operatin g in struction s to e nsure that the
meter is used s af ely and is kept in go od o perating co nd ition.
Full compli an ce with safety st an dards can be gu ar anteed only
with test lea ds s upplied. If nec es sary, th ey m us t be replaced
with the type s pe cified in this ma nu al.
1.2Main te nance
• Before o pe ning the case, always dis co nnect test leads
from all e ne rgized circuits.
• For cont in ue protection against f ir e; replace fuse only
with the s pe cified voltage and curr en t ratings:
250mA/ 25 0V(Quick Acting)
10A/25 0V (Quick Acting )
• Never us e th e meter unless the back cov er i s in place
and fast en ed completely.
• Do not use a br asives or solvents on the m et er. To cle an
it using a d am p cloth and mild detergen t on ly
1.1Safe ty s ymbols
Import an t safety information, r ef er t o the
operat in g manual.
Danger ou s voltage may be present
Anti-g ar bage
Double i ns ulation (Protection c la ss II).
Fuse mus t be r eplaced with rating spe ci fied
in the man ua l.
03
1.3 Duri ng u se
• Never ex ce ed the protection limit v al ues indicated in
specif ic ations for each range of me as urement.
• When the m et er is linked to measureme nt c ircuit, do not
touch un us ed terminals.
• Never us e th e meter to measure voltag es t hat might
exceed 6 00 V above earth ground in cat eg ory II
instal la tions.
• When the v al ue scale to be measured is un kn own
before ha nd, set the range selecto r at t he highest
positi on .
• Before r ot ating the range selecto r to c hange functions,
discon ne ct test leads from the circ ui t un der test.
• When car ry ing out measurements on TV or switchi ng
power ci rc uits always remember th at t here may be high
amplit ud e voltages pulses at test p oi nts, which can
damage t he m eter.
• Always i s ca reful when working with v ol tages above 60V
dc or 30V ac r ms . Keep fingers behind the p ro be barriers
when mak in g voltage measurement s wi th test leads.
• Never pe rf orm resistance measur em ents on live circuits
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