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Velleman DVM894 Manual

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DVM894
V. 01 – 21/01/2015 100 ©Velleman nv
7.8 Capacitância
PARA EVITAR CHOQUES ELÉTRICOS OU DANOS, DESLIGUE O CIRCUITO E
DESCARREGUE OS CONDENSADORES ANTES DE MEDIR A CAPACITÂNCIA.
1. Ligue o cabo de teste preto na entrada COM e o cabo de teste vermelho na
entrada
hFE mA.
2. Coloque o seletor giratório na posição e selecione a categoria apropriada.
3. Ligue os cabos de teste aos terminais do circuito/condensador e leia o valor
que aparece no visor LCD.
7.9 Medição da Frequência
1. Ligue o cabo preto na entrada COM e o cabo vermelho na entrada VTempΩ
Hz.
2. Coloque o seletor giratório na posição Hz.
3. Ligue os cabos de teste a dois terminais do circuito e leia o valor que aparece
no visor LCD.
7.10 Temperatura
PARA EVITAR CHOQUES ELÉTRICOS OU DANOS, NÃO MEÇA A SUPERFÍCIE DO
OBJETO COM UM POTENCIAL ELÉTRICO SUPERIOR A 60 VDC/24 VAC.
1. Ligue a tomada multifunções com o terminal IN na entrada VTempΩ Hz e o
terminal COM na entrada COM.
2. Introduza o termopar tipo-K na tomada multifunções respeitanto a polaridade.
3. Rode o seletor para a posição TEMP.
4. Use um termopar para medir a temperatura da superfíce do objeto a testar.
5. Leia o valor apresentado no visor.
7.11 Ganho do Transistor
PARA EVITAR CHOQUES ELÉTRICOS E DANOS, NÃO TESTE TENSÕES
SUPERIORES A 250 V AC/DC
1. Ligue a ficha mulfunções com o terminal IN na entrada hFE mA e o terminal
COM na entrada COM.
2. Coloque o seletor giratório na posição hFE e selecione a categoria indicada.
3. Determine se o transistor a ser testado é do tipo NPN ou PNP, e em seguida
introduza os três pinos do transistor nos furos correspondentes da ficha
multifunções.
4. Veja a indicação no LCD do ganho aproximado do transistor.
… 100 …


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