GE Hydran 201 i Instruction Manual page 291

History File: Either one of four distinct groups of data (Short Term, Long Term, Events
and Service) that are recorded automatically and/or periodically and stored in the
Hydran 201Ti's memory
HMI: Human/Machine Interface
Host Computer: IBM PC (or compatible) connected remotely to a Hydran 201i System
and running the Hydran Host software
Hourly Trend: Variation of gas level during an adjustable period of time calculated in
hours
Hydran 201Ci: Any of the controllers from the Hydran family of products:
Hydran 201Ci-1 or Hydran 201Ci-C. Abbreviated to H201Ci.
Hydran 201Ci-1: One-channel controller designed to supervise one Hydran 201Ti and
link it to a host computer running the Hydran Host software. This configuration is referred
to as Hydran 201R Model i. Abbreviated to H201Ci-1.
Hydran 201Ci-C: Communications controller designed to supervise up to four
Hydran 201Ti's. The Hydran 201Ci-C does not have a numerical display, analog outputs
or alarm contacts; it is meant only as an interface between the Hydran 201Ti's and the host
computer running the Hydran Host software. Abbreviated to H201Ci-C.
Hydran 201i System: Continuous, on-line, combustible gas-in-oil monitor, taking the
form of either a Hydran 201Ti used alone or the combination of at least one Hydran 201Ti
and a Hydran 201Ci Controller
Hydran 201R Model i: Specific configuration of Hydran 201i System, which consists of
one Hydran 201Ti linked to a Hydran 201Ci-1. This combination has been designed to
replace or complete an existing installation of Hydran 201R (previous generation of
transformer incipient fault monitor).
Hydran 201 Sensor: Electrochemical gas detector used in the Hydran 201Ti to detect and
measure a composite value of four dissolved gases in transformer oil
Hydran 201Ti: Intelligent transmitter, an apparatus that uses an electrochemical gas
detector to detect and measure a composite value of four dissolved gases in transformer oil.
Abbreviated to H201Ti.
Part 17997 Rev. 6, March 2011 I-5