Tektronix DMM4020, Technical Reference Manual

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Introduction and Specifications
Electrical Specifications
1
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 k
Ω
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
(5-1/2 Digits)
Resolution
Input Impedance
Slow Medium Fast
200 mV 199.999 mV
1
µ
V 10
µ
V 10
µ
V >10 G
Ω
[1]
2 V 1.99999 V 10
µ
V 100
µ
V 100
µ
V >10 G
Ω
[1]
20 V 19.9999 V
100
µ
V 1000
µ
V 1000
µ
V
10 M
Ω±
1 %
200 V 199.999 V 1 mV 10 mV 10 mV 10 M
Ω±
1 %
1000 V 1000.00 V 10 mV 100 mV 100 mV 10 M
Ω±
1 %
Notes:
[1] At some dual display measurements, the input impedance of 200 mV and 2 V ranges may be changed to 10 M
Ω
.
Accuracy
Range
Uncertainty
[1]
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
Notes:
[1] Uncertainty given as
±
(% of r % of range)
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