Agilent Technologies DC140 Instrukcja Użytkownika Pobierz pdf (Strona 8)

Supplemental Measurement Specifications

Table 7 .Supplemental measurement specifications

DC Voltage

Measuring Method: Sigma Delta A-to-D converter

Input Resistance: > 10 GΩ ± 2% range (Selectable 100 mV, 1 V ranges)

10 MΩ ± 2% range (typical)

Input Protection: 1000 V on all ranges (HI terminal)

Resistance

Measurement Method: 2-wire or 4-wire Ohms

Open circuit voltage: Limited to < 2.8 V

Input Protection: 1000 V on all ranges (HI terminal)

DC Current

Shunt Resistance: 1 Ω for 10 mA, 100 mA

90 Ω for 100 μA, 1mA

0.01 Ω for 1 A, 10 A

Input Protection: Externally accessible at Rear Panel 0.4 A, 500 V fuse

for I terminal

Internal 11 A, 1000 V fuse for 10 A terminal

Continuity / Diode Test

Measurement Method: Uses 0.5 mA ± 0.2% constant current source

Response Time: • Continuity : 165 samples/second with audible tone

• Diode : 190 samples/second with audible tone

Continuity Threshold: 10 Ω fixed

Input Protection: 1000 V (HI terminal)

Temperature

Measurement Method: 2-wire Ohms measurement of 5 kΩ thermistor sensor

(YSI 4407) with computer conversion

Auto-ranging measurement, no manual range selection

Input Protection: 1000 V (HI terminal)

Measurement Noise

Rejection

CMR (Common Mode Rejection)

For 1 kΩ unbalance LO lead

DC 140 dB

AC 70 dB

NMR (Normal Mode Rejection)

For 60 Hz (50 Hz) ± 0.1%

Slow mode 5½ digits 90 dB

Medium mode 4½ digits 55 dB

Fast mode 4½ digits 0 dB

AC Voltage

Measurement Method: AC coupled true-rms - measures the AC component with up

to 400 VDC bias any range

Crest Factor: Maximum 3:1 at full scale

Input Impedance: 1MΩ ± 2% in parallel with < 100 pF of all ranges

Input Protection: 750 V rms on all ranges (HI terminal)

1 2 3 4 5 6 7 8 9 10 11 12

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