2101510 Rev. AG
Page 2–25
T
= Purge Time
L
= Line Length, ft.
V
= Tubing Volume, cc/ft.
Fs
= Standard Flow, cc/min.
P
= Actual Pressure, PSIG
T
= Actual Temperature,
°
F
Zp = Compressibility at P Pressure
In this step, the lowest possible pressure should be used. This
minimizes transport tubing lag time to reduce line or molecule
peak. Care should be taken to assure that enough pressure is
available to keep sample flowing throughout the analysis
system.
2.9 NGC8206 Standard Software Features
Totalflow’s on-board and host software work together to provide many key
features that enable the user to access, control and share data. The user-friendly
interface allows multi-faceted report and communication capabilities without
compromising the integrity of the system or the data.
•
Modular Software Design-Application Based Plug-In Software Modules
•
Audit Quality Historical Data
•
Operational Alarms
•
Tri-Level Software Security System
•
Multiple Calculation Options
•
Selectable Engineering Units (future)
•
Analysis Reporting
•
Communication Protocol Selection
•
Web Enabled Data Collection
2.9.1
Audit Quality Data
Totalflow’s software design creates a historically accurate file system that uses
date and time stamped events to create an audit quality data structure.
The unit can collect, analyze and retain (default) stream data for the last 480
analysis cycles, retain the last 35 days of daily stream averages, the last 480
diagnostics reports, the last 480 alarms and the last 480 events. Additionally, this
can be reconfigured by the user.
2.9.2
Tri-Level Security
The software security system is designed to have a password administrator who
sets up the accounts and privileges PCCU users. This privilege includes being
able to instantiate applications and make changes to the functionality of the NGC.
See the Help files in the host software package for more information.
2.9.3
Compressibility Options
User-selectable measurement calculations may be defined individually per stream
and include:
•
AGA-5
•
AGA-8 Detail
•
ISO Summation Factor
•
Single Virial Summation Factor
•
None (a factor of one is used)
•
NX-19