Technical Data
Digital Measurement
SKF Multilog On
-Line System IMx-S
7 - 3
User Manual
•
Simultaneous sampling of different channels with different sampling rates
•
Frequency range: from DC to 40 kHz
•
Dynamic range: 120 dB
•
Signal to noise ratio: 90 dB
•
Cross-
talk rejection: 100 dB
•
Accuracy amplitude: ±2% (up to 20 kHz), ±5% (20 to 40 kHz)
•
Accuracy phase: ±3° (up to 100 Hz)
Digital Measurement
•
Frequency range: 0,1 Hz to 20 kHz (I/O board
v1.24 and later, DIP21-switch with
6 positions)
•
Frequency range: 0,1 Hz to 12,5 kHz (I/O board older versions, DIP21
-switch with
4 positions)
–
Required pulse width: > 4
µ
s for electrical positive
> 40
µ
s for electrical negative
•
Accuracy frequency: 0,05% of measurement value (typically 0,01% up to 2,5 kHz)
•
Pulse counting
Signal Processing
•
Time waveform
•
Vector analysis with circular alarms
•
FFT: 100 to 6 400 lines
•
SKF's four enveloping bands
•
Integration/Differentiation in frequency domain
•
Window function: Hanning
•
Customer formulated mathematical equations
•
Dynamic alarm levels, active range determined on multiple parameters
•
Data storage on time, event or alarm condition
•
Data buffering in flash memory when communication link is down
•
Detection of sensor and cable fault
•
Wat
chdog and self testing
