Campbell Scientific CSM1 Card Storage Module - Manual (Page 7)

1
CSM1 Card Storage Module
The Card Storage Module system consists of a microprocessor-controlled read/write
module (the CSM1) and removable credit card sized memory cards that hold data and/or
datalogger programs in battery-backed memory. The memory cards are easily exchanged
and transported to a computer for data retrieval.
The module is quickly prepared for use, and features built-in status indicators for module
operation and data storage. The CSM1 can be left with the datalogger and the memory
cards exchanged at regular intervals, or it can be moved from datalogger to datalogger to
retrieve data from each one in turn. The low quiescent power consumption and wide
operating temperature range allow the module to be used in remote battery-powered
applications.
1. Introduction
Data stored in a card is separated into files. The files are stored sequentially in
the card and are segregated by filemarks. A filemark is written into the card
when it is plugged into a CSM1, or can be written under software control by
the datalogger or computer. This allows data from different dataloggers or
different experimental runs to be separated.
Datalogger programs can also be stored from and loaded into a datalogger
using the CSM1. (21X and CR7 dataloggers need recent versions of their
operating software; see section 2.)
Two software programs are available for transferring data into an IBM-
compatible PC and storing datalogger programs created on the PC in the card.
SMCREAD is used when the computer has a built-in PC card slot. CSMCOM
is used to transfer data from the CSM1 or MCR1 via the computer’s RS232
port. The CSM1 can be connected to the RS232 port via a SC532(A) (Figure
2). The MCR1 Memory Card Reader has an RS232 port for direct cable
connection to the Computer.
Alternatively you can develop your own programs to communicate with the
CSM1. Simple ASCII telecommunications commands can be sent to the CSM1
to extract data and load programs.
The CSM1 unit is housed in a compact aluminum case (see figure 1). The card
slot and connector are designed so that the card cannot be inserted the wrong
way round. The card pushes in and locates with a positive click, and a push-
button eject mechanism releases the card from the slot.