Chapter 2. Displaying Data
64
DigitalFlow™ DF868 Multipurpose Ultrasonic Liquid Flowmeter Programming Manual (2-Channel)
2.6 Displaying Transducer Signals (cont.)
In summary, three basic functions are performed with the numeric keys:
•
Signal Selection:
use the “1” and “2” keys to select a transducer signal for display by scrolling through the list of
available signals.
•
Vertical Scaling:
The “4” and “5” keys are used to scale the graph vertically. Each press of the “4” key doubles the
height of the graph, while each press of the “5” key halves the height of the graph. The three available scale
factors are 1x, 2x and 4x.
•
Horizontal Scaling:
The “7” and “8” keys are used to scale the graph horizontally. Each press of the “7” key
doubles the
T INC
value (2x horizontal compression), while each press of the “8” key halves the
T INC
value (2x
horizontal expansion). The four available compression ratios are 1x, 2x, 4x and 8x.
To return to the standard data screen, either select
EXIT
from the option bar or press the
[EXIT]
key on the keypad.
2.7 Setting the LCD Backlight
Use the
BACKL
submenu to specify the number of minutes the LCD display backlight remains on before it is
automatically turned off. Press the appropriate side of the
[SCREEN]
key to activate the desired pane of the display
screen, then proceed as follows:
Note:
For this discussion, it is assumed that the left pane of the display screen is active. If the right pane is active,
replace the
[F1]-[F4]
keys designations by the
[F5]-[F8]
keys.
1.
To access the
Display Menu
, press the
[DISP]
key.
2.
Press [
and
[F2]
=
BACKL
.
3.
Use the numeric keys to enter a value from 1 to 60 minutes and press
[ENT]
. To keep the backlight on constantly,
enter a value of 0 and press
[ENT]
.
The Model DF868 will automatically return to the previous data display screen and the programmed backlight
timeout interval will begin.
If no entries are made from the keypad before the backlight timeout interval expires, the backlight will automatically
be turned off. At the next keypad entry, the backlight will be turned on and the specified timeout interval will begin
again.