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RIGOL

User’s Guide for DM3058/DM3058E

6-7

Frequency/Period Characteristics

Accuracy Specifications (% of reading + % of range)

[1]

Function Range

Frequency

Range

1 Year

℃

±5

℃

Temperature

Coefficient

℃

to 18

℃

to 55

℃

Frequency

Period

200mV to

750V

[2]

20Hz-2kHz

0.01+0.003

0.002+0.001

2kHz-20kHz

0.01+0.003

0.002+0.001

20kHz-200kHz

0.01+0.003

0.002+0.001

200kHz-1MHz

0.01+0.006

0.002+0.002

20mA to

10A

[3]

20Hz-2kHz

0.01+0.003

0.002+0.001

2kHz-10kHz

0.01+0.003

0.002+0.001

[1] Specifications are for 30 minute warm–up.

[2] Unless otherwise noted, for frequency ≤100 kHz, the specifications are for AC input voltage

of 15% to 120% of range. For frequency >100 kHz, the specifications are for AC input

voltage of 40% to 120% of range. 750 V range is limited to 750Vrms. 200 mV range is full

range input or input that is larger than the full range. For 30 mV to 200 mV inputs,

multiply % of reading error by 10.

[3] Unless otherwise noted, the specifications are for AC input current from 15% to 120% of

range except where noted. 20mA range specifications are for full scale. For inputs from 5mA

to 20mA, multiply total % of reading error by 10. 10A range is for AC input current from

25% to 100% of range.

Measurement Characteristics

Frequency and Period

Measurement Method: Reciprocal-counting technique. AC-coupled input using the ac voltage

or ac current measurement function.

Measurement attentions:

All frequency counters are susceptible to error when measuring low–voltage, low–frequency

signals. Shielding inputs from external noise pickup is critical for minimizing measurement errors.

Setting time attentions:

Errors will occur when attempting to measure the frequency or period of an input following a dc

offset voltage change. The input blocking RC time constant must be allowed to fully settle (up to

1 sec) before the most accurate measurements are possible.

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