IDL 101
DATA STORAGE
56
HB_IDL101_E_V222.doc
Gantner Instruments Test & Measurement GmbH
8. DATA STORAGE
8.1. General Remarks to Data Storage
The
Datalogger IDL 101
has 512 Kbytes RAM memory. For data recording 508 Kbytes memory is available as circulate
memory. If this memory is full, the oldest record will be overwritten if a new record is stored. If the memory is read out,
the oldest record will be output and the corresponding space enabled.
Every record consists of length information, date, time and measured values.
L Time/Date M1 M2 .... Mx S1 S2 .... Sx
L Length of record (2 Byte)
Time Date and time of record (10 Byte)
M1 First measured value
M2 Second measured value
Mx Last measured value
S1 First external channel
S2 Second external channel
Sx Last external channel
Memory demand for one record:
NumBytes = 12 + 4 * number of measured values
Example:
Storage of eight measured value per hour.
NumBytes = 12 + 4 * 8 = 44 bytes per record
Memory demand per day = 24 * 44 = 1056 bytes
512 Kbytes internal RAM: 508000 / 1056 = 481 days
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