INSTALLATION AND OPERATING INSTRUCTIONS
SKF Multilog On-line System IMx-16Plus
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SKF Multilog On-line System IMx-16Plus
User Manual
Revision Letter A
Calculation for data per day would be:
FFT s time wa trend data + digital data
= (8 x 3200 x 2) + (8 x 3200 x 5,12) + (8 x 160 x 6 x 24) + (50 x 6 x 24)
= 51200 + 7200
= 375840 bytes per day or 375.8 KB per day
= 11,3 MB/month (average of 30 days per month)
In systems comprising large numbers of IMx devices, sharing network infrastructure,
it can be advantageous to offset their storage times such that, where possible, their
uploads are staggered.
2.5.17 Storage capacity
As noted in the specifications, each IMx-16Plus device has 4 GB effective flash (non-
volatile) storage used for the following:
•
1 GB for trend and dynamic data:
o
Depending on the measurement configurations and data storage
schedule configured, the data could be buffered for weeks up to
years.
o
When the buffer gets full the oldest data is discarded
–
first in first out.
o
Speed and temperature data use half the space of vibration data.
•
1 GB for event capture and run cycle data:
o
The number of events that can be stored depends on the number of
channels used, number of samples per channel, number of speed
pulses, internal flash sector alignment of data and additional data
provided with the capture.
o
For a maximum sized capture from an IMx-16Plus, i.e. 16 channels,
10 kHz, 60 seconds, the buffer is capable to hold at least 15 captures.
This scales with the number of samples in a capture, i.e. if number of
channels or samples/channel is halved then the capacity for the
number of captures stored is doubled.
o
When the buffer is full, no new captures will be triggered until there is
enough space to store a new capture (when at least one capture has
been uploaded to the server).
•
2 GB reserved for future development/needs
