Campbell Scientific CR200/CR200X-series Dataloggers - Manual (Page 16)

Section 2. Quickstart Tutorial
2.1.1.3 Datalogger
CR200(X)s can measure most sensors with an electrical response. CR200(X)s
measure electrical signals and convert the measurement to engineering units,
perform calculations and reduce data to statistical values. Every measurement
does not need to be stored. The CR200(X) will store data in memory awaiting
transfer to the PC via external storage devices or telecommunications.
2.1.1.4 Data Retrieval
The main objective of a data acquisition system is to provide data files on a PC.
Data are copied, not moved, from the CR200(X) to the PC. Multiple users may
have access to the same CR200(X) without compromising data or coordinating
data collection activities.
A RS-232 port is integrated with the CR200(X) wiring panel to facilitate data
collection.
On-site serial communications are preferred if the datalogger is near the PC, and
the PC can dedicate a serial (COM) port for the datalogger or use a USB-to-
serial converter. On-site methods such as direct serial connection or infrared
link are also used when the user visits a remote site with a laptop or PDA.
In contrast, telecommunications provide remote access and the ability to
discover problems early with minimum data loss. Typically a base station radio
that is compatible with the radio internal to the CR200(X) will be the preferred
method of telecommunication. A variety of devices, such as telephone modems,
satellite transceivers, and TCP/IP network modems may be interfaced with the
base station for the most demanding applications.
2.1.2 CR200(X) Mounting
The CR200(X) module integrates electronics within a compact housing, making
it economical, small, and very rugged.
2.1.3 Wiring Panel
As shown in FIGURE. CR200(X) Wiring Panel p. 5, the CR200(X) provides
terminals for connecting sensors, power and communications devices. Internal
surge protection is incorporated with the input channels.
The CR200(X) uses spring-loaded terminal blocks for connecting sensors and
peripherals. This provides quick, vibration resistant connections. To attach
wires, insert a small flat blade screwdriver into the slot and push back. Insert
the wire and then bring the screwdriver forward.
Caution! Opening a terminal by prying the end may cause damage,
particularly at low temperatures.
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