GE Hydran 201 i Instruction Manual page 292

Appendix I • Glossary
Hydran Host: Microsoft Windows software that communicates, through an RS-232 serial
communication link or a modem, with one or several Hydran 201Ti's using the host
computer. It allows a user to set operational parameters, survey alarm status, etc.
Hz: HertZ, a unit of frequency equal to a cycle per second
ID: IDentification
IEC: International Electrotechnical Commission
IED: Intelligent Electronic Device
IEEE: Institute of Electrical and Electronics Engineers (United States)
in: INch
I/O: Input/Output, two of the three activities (input, processing and output) characterizing
a computer. Refers to the complementary tasks of gathering data for the microprocessor to
work with and making the results available to the user through communication channels
such as the display, a disk drive or a printer.
Isolated Output: Output signal where a common reference is not connected to either input
terminal
kVA: KiloVolt-Ampere
L or Lo: Low alarm
Lab Data: Manually-entered gas sample data obtained from laboratory results
LAN: Local Area Network, a group of computers and other devices dispersed over a
relatively-limited area and connected by a communications link enabling any device to
interact and share with any other device or resource on the network. Usually, there is one
computer that controls all peripherals (such as printers and a hard disk drive). The other
computers are linked to the controlling computer, which lets the other computers take turns
using the peripherals.
LCD: Liquid Crystal Display, a type of flat-panel display commonly used on laptops or
PC's
I-6 Rev. 6, March 2011 Part 17997