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

Range

Frequency

24 Hour

(23 °C ±1 °C)

90 Days

(23°C±5°C)

1 Year

(23°C ±5°C)

Temperature

Coefficient/°C

Outside18 to 28°C

3- 5Hz

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

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.

NPLC

Frequency

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

300Hz- 1kHz

0

0.01

0.07

>1 kHz

0

0

0.02