Datasheet

www.tektronix.com/dmm4050_4040 9
Digital Multimeters – Tektronix DMM4050 and DMM4040
Resistance
Specifications are for 4-wire resistance function, 2 × 4-wire resistance, or 2-wire
resistance with zero. If zero is not used, add 0.2 Ω for 2-wire resistance plus lead
resistance, and add 20 mΩ for 2 × 4-wire resistance function.
Characteristic Description
Measurement Method Current source referenced to LO input
Max Lead Resistance
(4-wire ohms)
10% of range per lead for 10 Ω, 100 Ω, 1 kΩ ranges.
1 kΩ per lead on all other ranges
Input Protection 1000 V on all ranges
Common Mode
Rejection
140 dB at 50 or 60 Hz ±0.1% (1 kΩ unbalance)
Normal Mode Rejection 60 dB for NPLC of 1 or greater with analog filter off and
power line frequency ±0.1%
100 dB for NPLC of 1 or greater with analog filter on and
power line frequency ±0.1%
Analog Filter When using the analog filter, specifications are relative
to within one hour of using the ZERO function for that
range and NPLC setting
Input Characteristics
Range Resolution Resolution Source Current
4½ Digits 5½ Digits 6½ Digits
10 Ω 10.00000 Ω 1 mΩ 100 μΩ 10 μΩ 5 mA / 13 V
100 Ω 100.0000 Ω 10 mΩ 1 mΩ 100 μΩ 1 mA / 6 V
1 kΩ 1.000000 kΩ 100 mΩ 10 mΩ 1 mΩ 1 mA / 6 V
10 kΩ 10.00000 kΩ 1 Ω 100 mΩ 10 mΩ 100 μA / 6 V
100 kΩ 100.0000 kΩ 10 Ω 1 Ω 100 mΩ 100 μA / 13 V
1 MΩ 1.000000 MΩ 100 Ω 10 Ω 1 Ω 10 μA / 13 V
10 MΩ 10.00000 MΩ 1 kΩ 100 Ω 10 Ω 1 μA / 13 V
100 MΩ 100.0000 MΩ 10 kΩ 1 Ω 100 Ω 1 μA || 10 MΩ / 10 V
1.0 GΩ 1.000000 GΩ 100 kΩ 10 kΩ 1 kΩ 1 μA || 10 MΩ / 10 V
DMM4050/4040 Accuracy
Accuracy is given as ±(% measurement + % of range)
Range 24 Hour
(23 °C ±1 °C)
90 Days
(23 °C ±5 °C)
1 Year
(23 °C ±5 °C)
Temperature Coefficient/°C
Outside 18 to 28 °C
10 Ω 0.003 + 0.01 0.008 + 0.03 0.01 + 0.03 0.0006 + 0.0005
100 Ω 0.003 + 0.003 0.008 + 0.004 0.01 + 0.004 0.0006 + 0.0005
1 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
10 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
100 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
1 MΩ 0.002 + 0.001 0.008 + 0.001 0.01 + 0.001 0.001 + 0.0002
10 MΩ 0.015 + 0.001 0.02 + 0.001 0.04 + 0.001 0.003 + 0.0004
100 MΩ 0.3 + 0.01 0.8 + 0.01 0.8 + 0.01 0.15 + 0.0002
1 GΩ 1.0 + 0.01 1.5 + 0.01 2.0 + 0.01 0.6 + 0.0002
Additional Ohms Errors
Digits NPLC Additional NPLC Noise Error
6½ 100 0% of range
6½ 10 0% of range
5½ 1 0.001% of range
5½ 0.2 0.003% of range ±7 μV
4½ 0.02 0.017% of range ±15 μV