Precision Digital Corporation PD6928, Instruction Manual

Page: 69 / 80

PD6928 Loop-Powered Flow Rate/Totalizer Instruction Manual
69
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the
Advanced Features
– User
menu.
The table under CapTouch Buttons Operation on
page 68 shows the factory default settings for F1, F2,
and F3.
A hint message may be enabled to provide a
description of what each function key does prior to
executing their assigned function. See
Enabling the
Function Key Hint Feature (
HINT
) on page 65 .
Digital Input Operation
A digital input is standard on the meter. This digital
input is programmed identically to function keys F1,
F2, and F3. The input is triggered with a contact
closure between DI+ and DI-, or with an active low
signal. During operation, the digital input operates
according to the way it has been programmed in the
Advanced Features
– User
menu. Factory default
setting is to reset total.
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentarily.
Display momentarily by pressing the F1 function key
(default) or assigning to any of the other function keys
or to the digital input in the
User menu.
Display continuously by pressing the Enter button
while the max/min is being displayed to lock the
display. Press
Enter again to unlock.
Any of the F1-F3 function keys (buttons) and the
digital input can be programmed to reset the max &
min readings. The meters are set at the factory to
display the max reading by pressing the
Right
Arrow/F1 button and to use the Up-Arrow/F2 button to
access the Reset menu. Press the Right Arrow button
to cycle through the available parameters to reset.
Top Display: Process Value
Bottom Display: Max & Min
Runtime & Cycle Count (
INFO
)
The relay information menu shows runtime and cycle
count for each relay. These values may be cleared at
any time by selecting the
Clear option (
CLEAR?
). If
the cycle count or runtime values need to be changed
on a frequent basis, it would be convenient to set up a
CapTouch button or the digital input to simplify this
process.
Note: See the menu tree under Solid-State Relay
Outputs (
RELAY
) on page 45 for complete menu
structure on this feature.
Meter displaying the
amount of time a relay
has been activated Meter displaying the
number of times a
relay has cycled
Changing Engineering Units
During operation of the meter, it is possible to change
the display units within the selected unit class without
the need to re-scale the meter. The
UNITS
menu in the
DISPLAY
menu allows the unit of measure to be
changed (e.g. from gallons/second (
GAL/s
) to
liters/second (
L/s
)) and the meter will automatically
convert the display values to the new unit of measure.
If entering a custom unit (
CUSTOM
), a custom
conversion factor will need to be entered. See
Changing the Engineering Units (
UNITS
) on page 36 .