Hioki MR8880-20, Instruction Manual

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Appendix 6 Maximum Recordable Time
A
17
Appendix
The maximum recording time when saving waveform files to a CF card is as follows.
The recording times when all channels (4 Analog channels and 8 Logic channels)
are recorded are shown.
(The following table does not include a number of days that is 365 or more.)
The maximum recording time increases as the number of channels to be recorded is
reduced. (When using logic channels, the number of logic channels in use does not
affect the maximum recording time.)
Setting a slow timebase may result in a very long recording time (over a year) which
may exceed the guarantee period or product life, in which case we cannot guarantee
operation.
Real-time Function
Max. recording time =
( [Storage capacity
(*1)
] - [Size of header portion
(*2)
] ) (byte) x recording interval (seconds)
Number of recording channels
(*3)
x 2
*1. Storage capacity: The following examples show the calculations for the respective cards in
use:
Model 9727 (256MB)
: 256,000,000 bytes (256 x 1000 x 1000)
Model 9830(2GB) : 2,000,000,000 bytes (2 x 1000 x 1000 x 1000)
Internal Buffer Memory : 8,000,000 bytes (8 x 1000 x 1000)
*2. Size of header portion: Maximum 12288 bytes (0 byte when internal memory is in use)
Capacity = (14 + number of analog channels in use x 2 + number of logic terminals in use) x
512 (bytes)
*3. Number of recording channels: number of analog ch logic
(*)
(*) Logic is considered as follows regardless of the number of bits in use.
All channels OFF: 0 channel, At least 1 bit ON: 1 channel
When internal memory is used, logic is considered as 0 channel regardless of whether it is
ON or OFF.