Datasheet

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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 Characteristics
Range Full Scale
(5½ Digits)
Resolution Input Impedance
Slow Medium Fast
200 mV 199.999 mV 1 V 10 μV 10 μV >10 GΩ
*2
2 V 1.99999 V 10 μV 100 μV 100 μV >10 GΩ
*2
20 V 19.9999 V 100 μV 1000 μV 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 some dual-display measurements, the input impedance of 200 mV and 2 V ranges may be changed to 10 MΩ.
Accuracy
Range Uncertainty
*3
Temperature Coefficient/°C
Outside 18– 28°C
90 days 1 year
23°C ±5°C 23°C ±5°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).