GE DigitalFlow GF868, Programming Manual

Page: 19 / 152

DigitalFlow™ GF868 Programming Manual (2-Channel) 9
Chapter 1. Programming Site Data
1.6 Entering Channel Data
After selecting
[F1]=CH1
(or
[F2]=CH2
) at the initial programming screen, the following screen appears:
Based on the selection made above, proceed to the appropriate section of this chapter for instructions.
1.6.1 Activating a Channel
The
ACTIV
submenu activates a channel and selects the desired measurement method.
1. To enter the
Channel PROGRAM
menu, press
[F1] or [F2]
(depending on the desired channel) at the
User PROGRAM
prompt.
2. Enter the
ACTIV
submenu by pressing
[F1]
at the
Channel PROGRAM
prompt.
3. Press
[F1]
(OFF) to deactivate the channel and return to the
Channel PROGRAM
prompt, or press
[F2]
to activate the
channel in
BURST
mode.
4. 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 GF868 flowmeter can take measurements in two different ways:
•
Skan is the preferred 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 the preferred technique to use for making 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 16 of this chapter.
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 8.
Channel PROGRAM
status
ACTIV SYSTM PIPE I/O