PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer
Instruction Manual
63
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the
Advanced Features
– User
menu.
See
Programmable Function Keys User Menu
The table on page
settings for F1, F2, and F3.
Digital Inputs Operation
Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the totalizer. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 V in the
case of digital inputs 1-4 or with an active high signal,
see
The F4 is triggered with a contact closure to COM or
with an active low signal. During operation, digital
inputs operate according to the way they are
programmed in the Advanced Features
– User menu.
See
Programmable Function Keys User Menu
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentary:
1. Display briefly by assigning to the F1-F3
function keys or to the digital inputs in the
User
menu.
2. Display continuously by assigning either
display to max/min through the
Display
menu.
Any of the F1-F3 function keys (buttons) and the
digital inputs can be programmed to reset the max &
min readings. The totalizers are set at the factory to
display the max/min reading by pressing the Up
arrow/F2 button and to use the Right arrow/F1 button
to reset the max/min.
To display max and min channel A reading using
function key with factory defaults:
1. Press Up arrow/F2 button to display minimum
reading of channel A since the last
reset/power-up. The display will then display the
maximum reading of channel A since the last
reset/power-up.
2. To reset max/min press Right arrow/F1 button.
The max & min displays are reset to actual
values.
3. Press Menu to exit max/min display reading.
Total Reset Capabilities
The user may reset the total via a SafeTouch button,
the F4 terminal at the back of the meter, an external
contact closure on the digital inputs, automatically via
user selectable preset value and time delay, or
through serial communications.
Total Reset via SafeTouch Button
The three through-glass SafeTouch button function
keys can be programmed to reset the total and grand
total. This makes it possible for the user to reset either
the total or the grand total without opening the enclosure
cover and without the need for external devices. Of
course, if the total or grand total is password protected,
they will not reset when the function key is pressed.
Total Reset via F4 Terminal
The PD8-6262 includes a digital input (referred to as
the F4 terminal) located on the back of the electronics
module as standard that can be used to reset the total
or grand total, among other things. This is the preferred
method for externally resetting the total or grand total
because it does not interfere with the operation of the
SafeTouch buttons for programming as described
below in the Total Reset via Digital Input section.
Total Reset via Digital Input
In addition to the F4 digital input described above, the
PD8-6262 also includes four digital inputs that can be
used to reset the total or grand total. However, if a
digital input is used to reset the total, or for some
other purpose, the corresponding through-glass
SafeTouch button will function as a programming key.
Total Reset via Preset Value
The total and grand total can be programmed for
automatic reset based on a preset value determined
by the user. In the automatic reset mode, a
programmable time delay is available to reset the total
or grand total after the assigned preset is reached.
Total Reset via Serial
Communications
The total and grand total can be reset via serial
communications such as a Modbus command or
MeterView Pro.
