GE Hydran 201 i Instruction Manual page 293

LED: Light-Emitting Diode
LL or Lo-Lo: Low-Low alarm
Local Network: Daisy chain of Hydran 201Ci Controllers connected together using an
RS-485 link in order to monitor Hydran 201Ti's locally or remotely (via modem) using the
Hydran Host software
Local Site: User location where the data of the remote site is being analyzed
mA: MilliAmpere
mAdc: MilliAmpere Direct Current
Main Menu: Menu of the Hydran 201Ti's embedded software that gives access to the most
frequently used operation parameters and commands
Menu: Group of parameters and values accessed through a hierarchical, treelike structure
MHz: MegaHertZ, a unit of frequency equal to one million cycles per second
Modem: MOdulator/DEModulator, a communication device connecting data terminal
equipment to an analog or digital line. A modem transforms digital signals into an analog
signal suitable for transmission over telephone lines. This is the heart of computer telecom-
munications. The main factor that differentiates modems is their speed, measured in bps or
bauds.
MOV: Metal Oxide Varistor
MVA: MegaVolt-Ampere
mV/A: MilliVolt per Ampere
N : Nitrogen
2
NC: Normally Closed
NEMA: National Electrical Manufacturers Association enclosure standards, a protection
classification set by the NEMA. Type NEMA 4X enclosures are weatherproof and corro-
sionproof. They are primarily intended for indoor or outdoor use to provide a degree of
Part 17997 Rev. 6, March 2011 I-7