GE DigitalFlow GS868, Programming Manual

Page: 17 / 171

Programming Site Data 1-9
March 2008
Entering Channel Data
If
[F1]=CH1
(or
[F2]=CH2
) was selected at the initial User Program
prompt shown on page 1-8, the following screen appears:
Based on the selection made above, proceed to the appropriate section
of this chapter for instructions.
Activating a Channel
The
ACTIV
submenu activates a channel and selects the desired
measurement method. While following the programming instructions,
refer to the menu map in Figure A-1 on page A-1
.
1.
Enter the
ACTIV
submenu by pressing
[F1]
at the
Channel PROGRAM
prompt.
2.
Press
[F1]
(OFF) to deactivate the channel and return to the
Channel PROGRAM
prompt, or press
[F2]
to activate the channel in
BURST
mode.
3.
Press
[F1]
to select Skan mode or
[F2]
to select Skan/Measure
mode. The meter will exit the
ACTIV
submenu and return to the
channel menu screen.
:As indicated in the above prompt, the Model GS868 flowmeter can
take measurements in two different ways:
•
Skan is a low resolution technique for locating the acoustic signal
and for high velocity measurements. It is more robust in a noisy
environment than the Measure technique.
•
Measure is a more precise technique best used for low velocity
measurements.
If Skan is selected at the next prompt, the instrument uses this
technique exclusively. However, if S/M is selected, the meter uses
Skan to find the acoustic signal and then tries to use the Measure
technique for a more precise measurement.
Note:
To change the
Skan
and
Measure
parameters, see the
SIGNL
submenu section on page 1-20.
Procedure Options
After completing the above steps, the meter returns to the
Channel
PROGRAM
prompt. Continue as follows:
Chan 1 PROGR Start
Press the [
←]
and [
→]
keys and
a function key
[F1]-[F4]
to select
the desired submenu. From this
screen, press
[EXIT]
to return to
the initial User Program screen
shown on page 1-8.
Channel PROGRAM
status
ACTIV SYSTM PIPE I/O