ITC 27551, Operation Manual

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• Never use the meter to measure current if the circuit to be
measured might contain voltage exceeding 250V.
• Temperature measurement should be performed on non-
active part or insulation material only.
• Remaining endangerment: When an input terminal is con
nected to dangerous live potential it is to be noted that this
potential at all other terminals can occur!
• CATII-Measurement Category II is for measurements
performed on circuits directly connected to low voltage
installation. Examples are measurements on household
appliances, portable tools and similar equipments.
Do not use the meter for measurements within
Measurement Categories III and IV.
CAUTION:
To avoid possible damage to the meter or to the equipment
under test, follow these guidelines:
• Disconnect circuit power and discharge all high-voltage
capacitors before testing resistance, continuity or diodes.
• Use the proper terminals, function, and range for your
measurements.
• Before measuring current, check the meter's fuses and turn
OFF power to the circuit before connecting the meter to
the circuit
• Before rotating the function/range switch to change func-
tions, disconnect test leads from the circuit under test.
• Before attempting to insert transistors for testing, always
be sure that the test leads have been disconnected from
any measurement circuits.
• Remove test leads from the meter before opening the
meter case.
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•
Ne j am ais utili ser l'a ppa reil po ur m esu rer le c our ant d'un cir cuit si
cel ui-c i p eut êt re mun i d ’un e te nsi on sur pas san t 2 50 V.
•
Les m esu res de tem pér atur e d oive nt ê tre pris es u niq uem ent sur un e
pièc e in acti ve o u su r le m atér iel iso lan t.
•
Risq ues su ppl ém enta ires : Lo rsq u'un e b orn e d 'en tré e es t b ran ché e
à u ne p arti e d e ci rcu it s ous ten sion , p ren dre not e q ue t ous les au tres
ter mina ux p euv ent aus si ê tre sou s te nsio n!
•
La c atég orie de m esu re C ATII s'a ppl iqu e au x m esu res rel evé es s ur l es
circ uits di rec tem ent reli és à un e in stal lati on de b ass e te nsio n.
Par exe mpl e, d es m esu res su r d es a ppa reil s él ectr om éna ger s, d es
outi ls p orta tifs , et c. N e p as u tilis er l 'ap pare il p our de s m esu res
de c atég orie III et IV .
CAU TIO N:
Pou r é vite r d ’en dom mag er l ’ap par eil ou l’é qui pem ent
vér ifié , s uivr e c es dire ctiv es:
• Déb ran che r le cir cuit d'a lim enta tion et déc harg er l es
con den sate urs hau te t ens ion av ant de vé rifi er l a ré sist anc e,
la con tin uité ou le s d iod es.
• Utili ser les bo rne s, le s fo ncti ons et, un e éc hell e ad équ ates
pou r la m esu re.
• Ava nt d e m esu rer le c our ant, vé rifie r le s fu sib les de l'a ppa reil
et C OUP ER l’a lim ent atio n d u c irc uit ava nt d e b ran che r le
mul tim ètre au cir cuit
• Ava nt d 'uti lise r le co mm utat eur ro tati f d e fo ncti on et d 'éc hell e
pou r ch ang er d e fo nct ion , d ébr anc her le s fi ls d’e ssa i d u
circ uit.
• Ava nt d 'ins érer un tra nsis tor po ur l e vé rifie r, s 'as sur er q ue l es
fils d'e ssa i so nt d ébr anc hés du cir cuit à m esu rer.
• Reti rer les fils d'e ssa i d e l'a ppa reil av ant d'ou vrir le cou verc le.
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