Wavetronix SmartSensor 105 (SS-105) - User Guide - Manual (Page 77)

76 CHAPTER 7 • DATA COLLECTION
The sensor’s SRAM buffer contains up to 246 of the most recent interval data records.
This type of storage is temporary because SRAM is volatile—its contents will be lost if the
sensor’s power supply is interrupted. The sensor’s flash memory buffer contains up to 2975
interval data records. This type of storage is permament because flash memory is nonvola-
tile—it will retain its contents even if the sensor’s power supply is interrupted.
Note
The smallest amount of flash memory that can be erased at one time represents
several interval data records. As a result, if you are collecting data with the Memory
Ovewrite feature enabled, you will not typically see the buffer fill up 100%. In fact,
you may see the usage fall from near 100% to something near 80%. This is because
as usage approaches 100%, a portion of the oldest contents are erased in order to
make room for newer data.
If you want to force the contents of the sensor’s SRAM buffer to be written to flash mem-
ory, click the Transfer>> button.
Data Download
To download interval data stored on the sensor in the SRAM and flash memory buffers—
such as data collected in a study—go to Data Collection > Download. The screen that
comes up is divided into two sections, Download Interval Data and Interval Data Buffers
(see Figure 7.3).
Figure 7.3 – Data Download