Frequency; Duty Ratio - Mastech MS2225A Operation Manual

3.2.5 Frequency

3.2.5.1 Frequency measurement with clamp
(at A gear):
Range
Resolution
99.99Hz 0.01Hz
999.9Hz 0.1Hz
- Measurement range: 10 Hz~1 kHz
- Range of input signal: ≥ 20A AC (the input current is
increased with the measured frequency)
- Maximal input current: AC 1000 A (effective value)
3.2.5.2 At V gear:
Range
Resolution
99.99Hz 0.01Hz
999.9Hz 0.1Hz
9.999kHz 0.001kHz
- Measurement range: 10 Hz~10kHz
- Range of input voltage: ≥ 1 V AC (effective value) (the
input voltage is increased with the measured frequency)
- Input impedance: 10MΩ
- Maximum input voltage: 750 V AC (effective value)
3.2.5.3 At HZ/DUTY gear:
Range
Resolution
9.999Hz 0.001Hz
99.99Hz 0.01Hz
Accuracy
±(1.5% rdg+ 5 dgt)
Accuracy
±(1.5% rdg+ 5 dgt)
Accuracy
±(0.3% rdg+ 5 dgt)
14
999.9Hz 0.1Hz
9.999kHz 0.001kHz
99.99KHZ 0.01kHZ
999.9KHZ 0.1KHZ
9.999MHZ 0.001MHZ
- Overload protection: 1000 V DC or 750 V AC (effective
value)
- Range of input voltage: ≥ 2 V (the input voltage is
increased with the increase of the measured frequency)

3.2.6 Duty ratio

Range
Resolution
0.1 - 99.9% 0.1%
3.2.6.1 At A gear (from the clamp):
- Frequency response: 10 ~ 1 kHz.
- Range of input current: ≥ 20 A AC (effective value)
-Maximal input current: AC 1000 A
3.2.6.2 At V gear:
- Frequency response: 10 ~ 10kHz.
- Range of input voltage: 1 V AC.
- Input impedance: 10MΩ
- Maximum input voltage: 750 V AC (effective value)
3.2.6.3 At HZ/DUTY gear:
- Frequency response: 10 ~ 10MHz.
- Range of input voltage: ≥ 2V AC (effective value) (the
input voltage is increased with the measured frequency)
- Maximum input voltage: 250V AC (effective value)
±(0.3% rdg+ 5 dgt)
Accuracy
±(3.0% + 3 )
15