Campbell Scientific CR23X Micrologger - Manual (Page 68)

SECTION 4. EXTERNAL STORAGE PERIPHERALS
4-4
the CR23X to output the date and time values.
The Output Array ID, Day, and Time are always
4 character numbers, even when high resolution
output is specified. The seconds resolution is
0.1 seconds.
Each full line of data contains 8 data points (79
characters including spaces), plus a carriage
return (CR) and line feed (LF). If the last data
point in a full line is high resolution, it is followed
immediately with a CR and LF. If it is low
resolution, the line is terminated with a space,
CR and LF. Lines of data containing less than 8
data points are terminated similarly after the last
data point.
4.3.2 COMMA SEPARATED ASCII
Comma Separated ASCII strips all IDs, leading
zeros, unnecessary decimal points and trailing
zeros, and plus signs. Data points are separated
by commas. Arrays are separated by Carriage
Return Line Feed. Comma Separated ASCII
requires approximately 6 bytes per data point.
Example:
1,234,1145,23.65,-12.26,625.9
1,234,1200,24.1,-10.98,650.3
4.4 STORAGE MODULE
The Storage Module stores data in battery
backed RAM. Backup is provided by an internal
lithium battery. The RAM is internal on the
SM192/716 and on a PCMCIA card in the CSM1.
Operating power is supplied by the CR23X over
pin 1 of the CS I/O port. Whenever power is
applied to the CS I/O port (after having been off),
the Storage Module places a File Mark in the
data (if a File Mark is not the last data point
already in storage).
The File Mark separates data. For example, if
you retrieve data from one CR23X, disconnect
the Storage Module and connect it to a second
CR23X, a File Mark is automatically placed in
the data. This mark follows the data from the
first CR23X but precedes the data from the
second.
The SM192 has 192K bytes of RAM storage; the
SM716 has 716K bytes. Both can be configured
as either ring or fill and stop memory. The size of
memory in the CSM1 depends on the PC Card
used. The CSM1 is always fill and stop.
FIGURE 4.3-1. Example of CR23X Printable ASCII Output Format