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Digital multimeter specifications (continued)

Frequency specifications

Table 3. Frequency accuracy specifications ± (% of reading + % of range)

Function Range Frequency range

1 year

23 ºC ± 5 ºC

Temperature coefficient

0 to 18 ºC

28 to 55 ºC

Frequency

Voltage path:

100 mV to 750 V

< 2 Hz

< 20 Hz

20 Hz to 100 kHz

100 to 300 kHz

0.18 + 0.003

0.04 + 0.003

0.02 + 0.003

0.005

Current path:

10 mA to 3 A

< 2 Hz

< 20 Hz

20 Hz to 10 kHz

0.18 + 0.003

0.04 + 0.003

0.02 + 0.003

0.005

1. For 100 mV and 1 V ranges, the measurable frequency is up to 1 MHz at 0.5 V signal. Minimum input frequency is 1 Hz.

All frequency counters are susceptible to errors when measuring low-voltage, low-frequency signals. Shielding inputs from

external noise pickup is critical for minimizing measurement errors.

Table 4. Frequency sensitivity for voltage measurement

Input range

Minimum sensitivity (rms sine wave)

20 Hz to 100 kHz 100 to 300 kHz 300 kHz to 1 MHz

100 mV

1.0 V

10 V

100 V

750 V

50 mV

100 mV

1 V

10 V

100 V

50 mV

120 mV

1.2 V

12 V

–

0.5 V

—

1. Maximum input for specified accuracy = 10 × range or 750 V

rms

or 1000 V

Table 5. Frequency sensitivity for current measurement

Input range

Minimum sensitivity (rms sine wave)

20 Hz to 10 kHz

10 mA

100 mA

1.000 A

3 A

1 mA

10 mA

100 mA

300 mA

1 2 3 4 5 6 7 8 9 10 11 12 ... 18 19

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