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Einführung und Spezifikationen
Elektrische Spezifikationen 1
1-17
Widerstand
Spezifikationen gelten für 4-Draht-Widerstandsfunktion, 2 x 4-Draht-Widerstand oder 2-Draht-Widerstand mit Zero. Wenn
Zero nicht verwendet wird, 0,2 Ω für 2-Draht-Widerstand plus Messleitungswiderstand hinzufügen und 20 mΩ für 2 x 4-
Draht-Widerstandsfunktion hinzufügen.
Messmethode ......................................................... Stromquelle bezogen auf LO-Eingang.
Max. Messleitungswiderstand (4-Draht-Ohm)........ 10 % von Bereich pro Messleitung auf den Bereichen 10 Ω, 100 Ω,
1 kΩ. 1 kΩ pro Messleitung auf allen anderen Bereichen.
Eingangsschutz....................................................... 1000 V auf allen Bereichen.
Gleichtaktunterdrückung ..............................................140 dB bei 50 oder 60 Hz ±0,1 % (1 kΩ Unsymmetrie)
Gegentaktunterdrückung ........................................ 60 dB für NPLC von 1 oder größer mit Analogfilter aus und
Netzfrequenz ±0,1 %
100 dB für NPLC von 1 oder größer mit Gleichstromfilter ein und
Netzfrequenz ±0,1 %
Analogfilter.............................................................. Bei Verwendung des Analogfilters sind die Spezifikationen im
Verhältnis zu 1 Stunde Verwendung der ZERO-Funktion für diesen
Bereich und diese NPLC-Einstellung.
Eingangskenndaten
Auflösung
Bereich Auflösung 4½ Stellen 5½ Stellen 6½ Stellen Quellenstrom
10 Ω[1] 10,00000 Ω 1 mΩ 100 μΩ 10 μΩ 5 mA/13 V
100 Ω 100,0000 Ω 10 mΩ 1 mΩ 100 μΩ 1 mA/6 V
1 kΩ 1,000000 kΩ 100 mΩ 10 mΩ 1 mΩ 1 mA/6 V
10 kΩ 10,00000 kΩ 1 Ω 100 mΩ 10 mΩ 100 μA/6 V
100 kΩ 100,0000 kΩ 10 Ω 1 Ω 100 mΩ 100 μA/13 V
1 MΩ 1,000000 MΩ 100 Ω 10 Ω 1 Ω 10 μA/13 V
10 MΩ 10,00000 MΩ 1 kΩ 100 Ω 10 Ω 1 μA/13 V
100 MΩ 100,0000 MΩ 10 kΩ 1 kΩ 100 Ω 1 μA || 10 MΩ/10 V
1,0 GΩ [1] 1,000000 GΩ 100 kΩ 10 kΩ 1 kΩ 1 μA || 10 MΩ/10 V
[1] Nur 8846A
8846A Genauigkeit
Genauigkeit: ±(% Messwert + % Bereich)
Bereich 24 Stunden
(23 ±1 °C)
90 Tage
(23 ±5 °C)
1 Jahr
(23 ±5 °C)
Temperaturkoeffizient/ °C
Außenluft 18 bis 28 °C
10 Ω 0,003 + 0.01 0,008 + 0,03 0,01+ 0,03 0,0006 + 0,0005
100 Ω 0,003 + 0,003 0,008 + 0,004 0,01 + 0,004 0,0006 + 0,0005
1 kΩ 0,002 + 0,0005 0,008 + 0,001 0,01 + 0,001 0,0006 + 0,0001
10 kΩ 0,002 + 0,0005 0,008 + 0,001 0,01 + 0,001 0,0006 + 0,0001
100 kΩ 0,002 + 0,0005 0,008 + 0,001 0,01 + 0,001 0,0006 + 0,0001
1 MΩ 0,002 + 0,001 0,008 + 0,001 0,01 + 0,001 0,001 + 0,0002
10 MΩ 0,015 + 0,001 0,02 + 0,001 0,04 + 0,001 0,003 + 0,0004
100 MΩ 0,3 + 0,01 0,8 + 0,01 0,8 + 0,01 0,15 + 0,0002
1 GΩ 1,0 + 0,01 1,5 + 0,01 2,0 + 0,01 0,6 + 0,0002
29


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