S600+ Instruction Manual
A-4 Glossary Revised July-2017
H
Highway Addressable Remote Transducer (or HART) is a communication protocol
designed for industrial process measurement and control applications. It combines
both analogue and digital communication and can communicate a single variable using
a 4-20 mA analogue signal, while also communicating added information on a digital
signal.
Hexadecimal, referring to numbers in base 16 (that is, numbers from 0 through 9 and
letters from A through F).
See Calorific Value (CV).
Analog Output number value to be read.
Any positive or negative whole number, including zero.
The Intelligent Input Output module (P144), also known as “IIO”.
Institute of Petroleum or Ingress protection standard, referring to British standard 5420
or International Electro-Technical Commission standard 144.
In the calculations section of the generator, this option includes the Liquid Volume
Correction Tables (53 or 54) for a non-US configuration.
Interactive program loader; a tool used to transfer application programs from a PC to
the S600.
Intrinsic Safe. A technique used to prevent excess electrical energy, or faults, in
instrumentation from causing explosions in hazardous atmospheres. Often found in the
process industry. It is the only protection method accepted for use in Zone 0
hazardous areas.
International Organisation for Standards. A voluntary, non-treaty organization founded
in 1946 which is responsible for creating international standards in many areas,
including computers and communications. Its members are the national standards
organizations of the 89 member countries, including ANSI for the U.S. See
http://www.iso.org.
Measurement of fluid flow by means of pressure differential devices (such as orifice
plates, nozzles, or Venturi tubes) inserted in circular cross-section conduits.
Natural gas calculation of calorific values, density, relative density and Wobbe index
from composition.
Light-Emitting Diode (an indicator). On the S600, a light to show the status of the S600
in a visual form. As examples, the Alarm LED shows the status of the machine by the
color of the LED and communications between the main processor board and the IO
boards is shown on the rear of the flow computer by use of the transmit and receive
LEDs.
Numerically significant part of a floating-point number.
An option applicable only to liquid turbine applications and used to correct the flow rate
due to temperature and pressure effects on the body of the meter.
An option used to correct the K Factor or Meter Factor of a pulse input according to the
input frequency. This is used to correct discrepancies caused by the non-linearity of
the transducer connected to the pulse input.
A device communications protocol developed by Gould-Modicon and used on the
station supervisory computer data link.
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