Datasheet

Digital Multimeters — Tektronix DMM4020
Electrical Specifications
DC Voltage Specifications
Specifications are valid for 5½ digit mode and after at least a half-hour warm up.
Characteristic
Description
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 dielectric characteristics, and input
signal changes
Input Cha
racteristics
ResolutionRange
Full Scale
(5½ Digits)
Slow
Medium Fast
Input Impe dan ce
200 mV 199.999 mV 1 μV10μV10μV
>10 GΩ*
2
2 V 1.99999 V 10 μV100μV100μV
>10 GΩ*
2
20 V 19.9999 V 100 μV1000μV 1000 μV
10 MΩ ±1%
200 V 199.999 V 1 mV 10 mV 10 mV
10 MΩ ±1%
1000 V 1000.00 V 10 mV 100 mV 100 mV
10 MΩ ±1%
*
2
At som
e dual-display measurements, the input impedance of 200 mV and 2 V ranges may be changed to 10 MΩ.
Accuracy
Uncertainty*
3
90 days 1 year
Range
23 °C ±5 °C 23 °C ±5 °C
Te mp eratu re Coefficient/°C
Outside18-28°C
200 mV 0.01 + 0.003 0.015 + 0.004 0.0015 + 0.0005
2 V 0.01 + 0.002 0.015 + 0.003 0.001 + 0.0005
20 V 0.01 + 0.003 0.015 + 0.004 0.0020 + 0.0005
200 V 0.01 + 0.002 0.015 + 0.003 0.0015 + 0.0005
1000 V 0.01 + 0.002 0.015 + 0.003 0.0015 + 0.0005
*
3
Uncertainty given as ±(% of reading + % of range).
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