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Greenlee DM-300 Manual

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DM-300 • DM-310 • DM-330 • DM-350
149
Precisão
Consultar no parágrafo “Características Técnicas” as condições de
operação e o coeficiente de temperatura.
A precisão do aparelho é definida conforme indicado a seguir: ± (uma
percentagem do valor medido + um valor fixo) a 23 °C ± 5 °C
(73,4 °F ± 9 °F), 0% a 75% de humidade relativa.
Medições de verdadeiro valor eficaz (RMS): as precisões dos aparelhos
DM-300, DM-330 e DM-350 em corrente alternada são especificadas de 5%
(10% para a gama de 600,0 mV) a 100% da gama, excepto indicação em
contrário. A frequência deve situar-se dentro da largura de banda especificada
para ondas não sinusoidais. Os factores pico são os seguintes:
• Factor de pico < 2:1, na escala completa
• Factor de pico < 4:1, em meia escala
Tensão contínua (DC)
Gama Precisão
600,0 mV 0,7% + 0,2 mV
6,000 V 0,5% + 0,003 V
60,00 V 0,5% + 0,03 V
600,0 V 0,7% + 0,2 V
1000 V 1,2% + 6 V
Impedância de entrada: 1000 MΩ,
nominal, para gama de
600,0 mV; 10 MΩ, nominal,
para todas as restantes gamas
Tensão alternada (AC)
Precisão
Gama (50 a 500 Hz)
600,0 mV 1,2% + 0,3 mV
6,000 V 1,0% + 0,003 V
60,00 V 1,0% + 0,03 V
600,0 V 1,0% + 0,3 V
1000 V 2,5% + 6 V
Impedância de entrada: 10 MΩ ||
90 pF nominais
Ohms
Gama Precisão
600,0 Ω 0,8% + 0,4 Ω
6,000 kΩ 0,7% + 0,002 kΩ
60,00 kΩ 0,7% + 0,02 kΩ
600,0 kΩ 0,7% + 0,2 kΩ
6,000 MΩ 0,9% + 0,004 MΩ
60,00 MΩ 2,0% + 0,04 MΩ
600 Ω com aviso acústico de
continuidade
Gama Precisão
600,0 Ω 0,8% + 0,4 Ω
Resposta do aviso acústico de
continuidade: < 100 µs
Tensão com circuito aberto:
0,4 V DC, típico
Limiar do aviso acústico:
entre 10 e 150 Ω.
Teste de díodos
Tensão em
Corrente de teste circuito aberto Precisão
0,4 mA, típico < 1,6 V DC, típico 1,9 % + 0,003 V
… 149 …


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