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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
Channel PROGRAM
status
ACTIV
SYSTM
PIPE
I/O
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