Electrical Specifications; Dc Voltage Specifications - Tektronix DMM4020 Technical Reference Manual

Electrical Specifications

Specifications are valid for 5-½ digit mode and after at least a half-hour warm-up.

DC Voltage Specifications

Maximum Input ................................................. 1000 V on any range
Common Mode Rejection ................................. 120 dB at 50 or 60 Hz ±0.1％ (1 kΩ unbalance)
Normal Mode Rejection .................................... 80 dB at Slow Rate
A/D Nonlinearity ................................................ 15 ppm of range
Input Bias Current ............................................ <30 pA at 25 °C
Settling Considerations ................................... Measurement settling times are affected by source impedance, cable
Full-Scale
Range
(5-1/2 Digits)
200 mV 199.999 mV
2 V 1.99999 V
20 V 19.9999 V
200 V 199.999 V
1000 V 1000.00 V
Notes:
[1] At some dual display measurements, the input impedance of 200 mV and 2 V ranges may be changed to 10 MΩ.
Range
200 mV
2 V
20 V
200 V
1000 V
Notes:
Uncertainty given as ± (% of reading + % of range)
[1]
dielectric characteristics, and input signal changes
Input Characteristics
Resolution
Slow Medium
1 µV
10 µV 100 µV
100 µV 1000 µV
1 mV
10 mV 100 mV
Accuracy
[1]
Uncertainty
90 days
23 °C ± 5 °C
0.01 + 0.003
0.01 + 0.002
0.01 + 0.003
0.01 + 0.002
0.01 + 0.002
Introduction and Specifications
Fast
10 µV 10 µV
100 µV
1000 µV
10 mV 10 mV
100 mV
Temperature Coefficient/°C
1 year
23 °C ± 5°C
0.015 + 0.004
0.015 + 0.003
0.015 + 0.004
0.015 + 0.003
0.015 + 0.003

Electrical Specifications

Input Impedance
[1]
>10 GΩ
[1]
>10 GΩ
10 MΩ±1 %
10 MΩ±1 %
10 MΩ±1 %
Outside 18 – 28 °C
0.0015 + 0.0005
0.001 + 0.0005
0.0020 + 0.0005
0.0015 + 0.0005
0.0015 + 0.0005
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