Panametrics DigitalFlow GC868, Руководство по программированию, Страница: 29 / 134

DigitalFlow™ GC868 Programming Manual (2-Channel) 1-18
Chapter 1. Programming Site Data
1.6.5.4 Setting Advanced
Parameters
In the ADVAN option, you can enter parameters for a variety of specialized
operations. You can set parameters for static density, program tables for steam or
natural gas and for multiple K factors, and modify parameters for the Skan and
Skan/Measure techniques. To enter the ADVAN submenu, press [F4] at the SETUP
window, and refer to Figure A-3 on page A-3.
1.6.5.4.1 Static Density Use this option to specify basic parameters for mass flow measurement.
1. To enter the MASS submenu, press [F1] at the ADVAN window.
2. At the
Static Density?
prompt, press [F1] = NO or [F2] = YES . If you press NO , the
GC868 returns to the ADVAN window.
3. If you press YES , select the Density Type to calculate Mass Flow : [F1] = Rho (Fluid
Density) or [F2] = Mw (Molecular Weight) .
4. The next prompt depends upon your selection in step 3.
• If you select Rho ,
a.
The GC868 asks for the type of volumetric flow. Press
[F1]
to select
AcVOL
(Actual Volumetric Flow) or [F2] to select StVOL (Standard Volumetric
Flow).
b. Then enter the
Fluid Density
of the gas to be measured and press [ENT] . (The
meter will only accept values from 0.00001-100 lb/ft
3
.)
• If you select Mw,
Enter the Molecular Weight of the gas to be measured and press [ENT] . (The
range is from 0 to 100 glmol, and the default value is 28.85 glmol.)
The GC868 program returns to the ADVAN window.
1.6.5.4.2 Setting the A Value In the Skan/Measure Integrate mode, the A value aids in minimizing cycle skipping.
Use this option to specify parameters for the A value.
IMPORTANT: The
AVAL
default settings are suitable for most applications. Before
changing any of these parameters, consult the factory.
1. To enter the AVAL submenu, press [F2] at the ADVAN window.
2. Use the numeric keys to enter the desired
A_Value Minimum
, and press [ENT] .
(The available range is from 75 to 100.)
3. Use the numeric keys to enter the desired
A_Value Maximum
, and press [ENT] .
(The available range is from 100 to 125.)
4. Enter the desired
-Offset % of Peak
from 0 to 95%, and press [ENT] . (The default is
20.)
5. Enter the number of
Cycle Count Samples
(from 1 to 40) and press [ENT] . (The
default is 8.)
6. Enter the
Cycle #
(from 1 to 100) and press [ENT] . (The default is 1.)
The GC868 returns to the ADVAN window.