10.2 Basic Specifications
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Chapter 10 Specifications
5. Noise Measurement Specifications
Calculation channels 1(Select one from CH1 to CH4)
Calculation parameters Voltage/Current
Calculation type RMS spectrum
Calculation method Fixed 500 kS/s sampling, thinning after digital anti-aliasing filter
FFT calculation word length 32 bits
FFT data points 1,000/5,000/10,000/50,000 (according to displayed waveform recording length)
Anti-aliasing filter Automatic digital filter (varies with maximum analysis frequency)
Windows Rectangular, Hanning, flat-top
Data update interval Determined by FFT points within approx. 400 ms, 1s, 2s, or 15 s, with gap
Highest analysis frequency 200 kHz/50 kHz/20 kHz/10 kHz/5 kHz/2 kHz
Frequency resolution 0.2 Hz to 500 Hz (Determined by FFT points and maximum analysis frequency)
Noise amplitude measurement Calculates the ten highest level and frequency voltage and current FFT peak values (local maxima).
In FFT calculation results, peak values are recognized when data levels on either side are lower.
The lower noise frequency limit can be specified.
6. Motor Analysis Specifications (Model PW3390-03 only)
Number of input channels 3 channels
CH A: Analog DC input, Frequency input
CH B: Analog DC input, Pulse input
CH Z: Pulse input
Measurement input jacks Insulated BNC jacks
Input impedance (DC) 1 M ±100 k
Input methods Isolated and differential inputs (not isolated between channels B and Z)
Measurement parameters Voltage, torque, rotation rate, frequency, slip, and motor power
Maximum input voltage ±20 V (during analog, frequency, and pulse input)
Maximum rated voltage to earth 50 V (50 Hz/60 Hz)
Period of guaranteed accuracy 6 months (and 1.25 times specified accuracy for one year)
Conditions of guaranteed
accuracy
Temperature and humidity for guaranteed accuracy: 23C±3C (73F±5F), 80% RH or less
Warm-up time: 30 minutes or more
Input: With 0 V to ground, after zero adjustment
(1) Analog DC Input (CH A/CH B)
Measurement range ±1 V, ±5 V, ±10 V (when inputting analog DC)
Valid input range 1% to 110% f.s.
Sampling 10 kHz/16bits
Response time 1 ms (measuring zero to full scale, with LPF off)
Measurement method Simultaneous digital sampling and zero-crossing synchronous calculation system (cumulative aver-
age of intervals between zero crossings)
Synchronization source Same as power measurement input specification (common to CH A and CH B)
Measurement accuracy ±0.08% rdg. ±0.1% f.s.
Temperature coefficient ±0.03% f.s./°C
Effect of common mode voltage Not more than ±0.01% f.s. (with 50 V [DC or 50 Hz/60 Hz] between measurement jacks and PW3390
chassis)
Effect of external magnetic field Not more than ±0.1% f.s. (at 400 A/m DC and 50 Hz/60 Hz magnetic fields)
LPF OFF/ON (OFF: 4 kHz, ON: 1 kHz)
Total display area Zero-suppression range setting ±120%
Zero adjustment Zero-corrected input offset of voltage ±10% f.s. or less
(2) Frequency Input (CH A only)
Valid amplitude range ±5 V peak (5 V symmetrical, equivalent to RS-422 complementary signal)
Max. measurement frequency 100 kHz
Measurement range 1 kHz to 100 kHz
Synchronization source Same as power measurement input specification
Data output interval According to synchronization source
Measurement accuracy ±0.05% rdg. ±3 dgt.
Total display area 1.000 kHz to 99.999 kHz
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