Specifications

Chapter 1 Performance & Specifications RIGOL
Service Guide for DM3058
1-7
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
200 mV to
750 V
[2]
20 Hz – 2 kHz
0.01 + 0.003
0.002 + 0.001
2 kHz – 20 kHz
0.01 + 0.003
0.002 + 0.001
20 kHz – 200 kHz
0.01 + 0.003
0.002 + 0.001
200 kHz – 1 MHz
0.01 + 0.006
0.002 + 0.002
20 mA to
10 A
[3]
20 Hz – 2 kHz
0.01 + 0.003
0.002 + 0.001
2 kHz – 10 kHz
0.01 + 0.003
0.002 + 0.001
Rremarks:
[1] Specifications are for 0.5 hour warm-up.
[2] Except for special marks, the AC input voltage is 15% to 120% of range when <100 kHz, and
40% to 120% of range when >100 kHz. 750 V range is limited to 750 VRMS. 200mV range is
for full scale or higher. For inputs between 30 mV and 200mV, multiply total % of reading error
by 10.
[3] For AC input current from 15% to 120% of range except where noted. 20 mA range
specifications are for full scale. For inputs from 5 mA to 20 mA, multiply total % of reading
error by 10. 10 A range is for AC input current from 25% to 100% of range.
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.