Taking Measurements - GE DigitalFlow DF868 Startup Manual

3.3 Using the Display (cont.)
The middle portion of the screen pane is the prompt area. This area displays data, graphs, and logs in measurement
mode and menu prompts in programming mode. In addition, error code messages, which are described in the Service
Manual, are displayed in the prompt area.
The lower portion of the screen pane is called the option bar. The option bar displays the functions assigned to the four
keys immediately below the display screen (
key to select the function listed in the option bar immediately above it. If more than four functions are available, a
pointer ( ) appears on the far right of the locator bar. Press the [ or [ keys to display the additional functions on
the option bar.
For information about other symbols and text that may appear on the display screen, refer to the Service Manual.

3.4 Taking Measurements

The Model DF868 is capable of displaying several different variables in a variety of formats. However, this manual
will only discuss the basic measurement displays in the default screen format. Refer to the Programming Manual for
instructions on setting up alternate screen displays and see the Service Manual for a discussion of the diagnostic
parameters listed under the
Note: This section assumes that the left pane of the display screen is currently active. However, the same instructions
apply equally to the right screen pane, when it is active. Just change the function keys from
For a 2-channel Model DF868, the following initial screen appears immediately upon completion of the internal
checks. As an example, the display shows the measured velocity in ft/sec for Channel 1.
Ch1 Channel Label gSITE ‰
Ch1 Velocity Ft/s
6.95
(error codes appear here)
CH1 CH2 SUM
DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Startup Guide (1- and 2-Channel)
[F1]-[F4]
DIAG
option.
To select a different channel display option, press
Table 13 for a complete description of the available options.
DIF
Table 13: Channel Display Options
Option Bar Choice
=
[F1] CH1
=
[F2] CH2
=
[F3] SUM
=
[F4] DIF

=
[ + [F1] AVE
[F5]-[F8]
for the left pane and
Description
Channel 1
Channel 2
(Channel 1) + (Channel 2)
(Channel 1) - (Channel 2)
[(Channel 1) + (Channel 2)]/2
Chapter 3. Operation
for the right pane). Press a function
[F1]-[F4]
[F1]-[F4]
(or [ and
[F5]-[F8]
to .
[F1]
). See
35