Save/Recall Memory Allocation; Types Of Storage Disks - HP 8712ET User Manual

Table 11-1

Save/Recall Memory Allocation

Before reading this section, please refer to
in Chapter 4 for an overview of the Save/Recall functions.
This section provides details on the size of Save/Recall instrument state
files. Since disks have limited storage capacities, it is often important to
know how many instrument state files will fit on a disk, and how to
reduce the size of each file in order to maximize storage.

Types of Storage Disks

The analyzer is capable of saving complete instrument states for later
retrieval. It can store these instrument states to any one of the following:
Disk Capacities
Internal non-volatile RAM disk
Internal volatile RAM disk
Internal 3.5" floppy disk
The non-volatile RAM disk is powered by a battery, to provide short term
storage of data when the analyzer is not connected to ac power. With this
battery protection, data can typically be retained in memory for
approximately 250 days at 70 °C and for more than 5 years at 25 °C.
The number of files that can be saved to disk is limited by the space
available on the disk.
The number of bytes available for storage are displayed in the upper
right-hand portion of the disk catalog window, after the words "Bytes
Free."
In addition, each directory can only hold a limited number of files or
directories. The following table shows these limits:
ET User's Guide
Factory Preset State and Memory Allocation
Disk
Save/Recall Memory Allocation
"Using Instrument Functions"
Capacity
over 1.5 MB
over 5 MB to 23 MB
1.44 MB
11-13