1.1.3 Operations
The CR6 measures almost any sensor with an electrical response, drives direct communications
and telecommunications, reduces data to statistical values, performs calculations, and controls
external devices. After measurements are made, data is stored in onboard, nonvolatile memory.
Because most applications do not require that every measurement be recorded, the program
usually combines several measurements into computational or statistical summaries, such as
averages and standard deviations.
1.1.4 Programs
A program directs the data logger on how and when sensors are measured, calculations are
made, data is stored, and devices are controlled. The application program for the CR6 is written
in CRBasic, a programming language that includes measurement, data processing, and analysis
routines, as well as the standard BASIC instruction set. For simple applications, Short Cut, a user-
friendly program generator, can be used to generate the program. For more demanding
programs, use the full featured CRBasic Editor.
Programs are run by the CR6 in either sequential mode or pipeline mode. In sequential mode,
each instruction is executed sequentially in the order it appears in the program. In pipeline
mode, the CR6 determines the order of instruction execution to maximize efficiency.
1.2 Sensors
Sensors transduce phenomena into measurable electrical forms by modulating voltage, current,
resistance, status, or pulse output signals. Suitable sensors do this with accuracy and precision.
Smart sensors have internal measurement and processing components and simply output a
digital value in binary, hexadecimal, or ASCII character form.
Most electronic sensors, regardless of manufacturer, will interface with the data logger. Some
sensors require external signal conditioning. The performance of some sensors is enhanced with
specialized input modules. The data logger, sometimes with the assistance of various peripheral
devices, can measure or read nearly all electronic sensor output types.
The following list may not be comprehensive. A library of sensor manuals and application notes
is available at www.campbellsci.com/support to assist in measuring many sensor types.
l Analog
o
Voltage
o
Current
o
Strain
1. CR6 data acquisition system components 3
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