Rigol M300 Manual do Utilizador descarregar pdf (Página 135)

RIGOL

User’s Guide for DM3000 Series

5-15

Frequency Period Characteristics

Accuracy Specifications (% of reading)

[1]

Function

Range

Frequency

Range

1 Year

23℃±5℃

Temperature

Coefficient

0 ℃ to 18 ℃

28 ℃ to 55 ℃

Frequency

Period

200mV

to 750V

[2]

3Hz-5Hz

0.10

0.005

5Hz-10Hz

0.07

0.005

10Hz-40Hz

0.02

0.005

40Hz-300kHz

0.02

0.005

20mA to10A

[3]

3Hz-5Hz

0.10

0.005

5Hz-10Hz

0.07

0.005

10Hz-10kHz

0.02

0.005

[1] Specifications are for 60 minute warm–up.

[2] For AC input voltages 10% to 120% of range except where noted. 750V range limited to 750VRMS.

100mV range specifications are for full scale or greater inputs. For inputs from 10mV to 100mV, multiply

total % of reading error by 10.

[3] For the 20mA, 200mA, 10A ranges, the AC input current from 10% to 120% of range except where noted.

For 1A range, the AC input current from 50% to 120% of range except where noted.

Measurement Considerations

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.

Settling Considerations

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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