Datasheet

www.tektronix.com/dmm4050_4040 13
Digital Multimeters – Tektronix DMM4050 and DMM4040
Frequency
Characteristic Description
Gate Time Programmable to 1 s, 100 ms, and 10 ms
Measurement Method Flexible counting technique. AC-coupled input using the AC
voltage measurement function
Settling Considerations When measuring frequency or period after a DC offset
voltage change, errors may occur. For the most accurate
measurement, wait up to 1 second for the input blocking
capacitor to settle
Measurement
Considerations
To minimize measurement errors, shield inputs from external
noise when measuring low-voltage, low-frequency signals
DMM4050/4040 Accuracy
Accuracy is given as ±(% measurement + % of range)
Range Frequency 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
100 mV to 1000 V*
10, 11
3 – 5 Hz 0.1 0.1 0.1 0.005
5 – 10 Hz 0.05 0.05 0.05 0.005
10 – 40 Hz 0.03 0.03 0.03 0.001
40 Hz – 300 kHz 0.006 0.01 0.01 0.001
300 kHz – 1 MHz 0.006 0.01 0.01 0.001
*
10
Limited to 8 × 10
7
Volt-Hertz
*
11
Input >100 mV. For 10 – 100 mV, multiply percent measurement error by 10.
Gate Time vs. Resolution
Gate Time Resolution
0.01 5½
0.1 6½
1.0 6½
Additional Low-frequency Errors
Error stated as percent of measurement for inputs >100 mV. For 10 – 100mV,
multiply percent by 10.
Frequency NPLC
6½ 5½ 4½
3 – 5 Hz 0 0.12 0.12
5 – 10 Hz 0 0.17 0.17
10 – 40 Hz 0 0.2 0.2
40 – 100 Hz 0 0.06 0.21
100 – 300 Hz 0 0.03 0.21
300 Hz – 1 kHz 0 0.01 0.07
>1 kHz 0 0 0.02