CR200/CR200X Series Dataloggers - Campbell Scientific
CR200/CR200X Series Dataloggers - Campbell Scientific
CR200/CR200X Series Dataloggers - Campbell Scientific
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Appendix A. Glossary<br />
A.1 Terms<br />
AC<br />
See VAC (Appendix p. 12).<br />
A/D<br />
Analog-to-digital conversion. The process that translates analog voltage<br />
levels to digital values.<br />
accuracy<br />
A measure of the correctness of a measurement. See also Accuracy,<br />
Precision, and Resolution (Appendix p. 13).<br />
Amperes (Amps)<br />
Base unit for electric current. Used to quantify the capacity of a power<br />
source or the requirements of a power consuming device.<br />
analog<br />
Data presented as continuously variable electrical signals.<br />
ASCII / ANSI<br />
Abbreviation for American Standard Code for Information Interchange /<br />
American National Standards Institute. An encoding scheme in which<br />
numbers from 0-127 (ASCII) or 0-255 (ANSI) are used to represent predefined<br />
alphanumeric characters. Each number is usually stored and<br />
transmitted as 8 binary digits (8 bits), resulting in 1 byte of storage per<br />
character of text.<br />
asynchronous<br />
The transmission of data between a transmitting and a receiving device<br />
occurs as a series of zeros and ones. For the data to be "read" correctly, the<br />
receiving device must begin reading at the proper point in the series. In<br />
asynchronous communication, this coordination is accomplished by having<br />
each character surrounded by one or more start and stop bits which<br />
designate the beginning and ending points of the information (see<br />
Synchronous (Appendix p. 11)).<br />
baud rate<br />
The speed of transmission of information across a serial interface,<br />
expressed in units of bits per second. For example, 9600 baud refers to bits<br />
being transmitted (or received) from one piece of equipment to another at a<br />
rate of 9600 bits per second. Thus, a 7 bit ASCII character plus parity bit<br />
plus 1 stop bit (total 9 bits) would be transmitted in 9/9600 sec. = .94 ms or<br />
about 1000 characters/sec. When communicating via a serial interface, the<br />
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