Precision Digital Corporation ProtEX-MAX PD8-6060, Инструкция по эксплуатации

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PD8-6060 Explosion-Proof Dual Analog Input Process Meter
Instruction Manual
61
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 (
user
)
on page 58 for details.
The Meter Operation
When installed, the primary way to operate the meter
is with the SafeTouch through-glass buttons that allow
the user to perform various operations without
removing the cover and exposing the electronics to
the hazardous environment. The user can also
operate the meter by connecting a suitable control
station or switch to one of the digital inputs that can
be used to perform various operations on the meter
based on the Programmable Function Keys. Finally,
certain operations can be performed on the meter
with MeterView Pro software or though Modbus
®
commands.
The two default operations that can be performed with
the meter’s SafeTouch buttons are:
1. Display the maximum and minimum readings
2. Acknowledge the relays
In addition, the user can program the SafeTouch
Buttons to perform a variety of useful operations by
reassigning them to other functions per
Function Keys
& Digital I/O Available Settings on page 58.
Button Operation table on page 60 shows the factory
default settings for F1, F2, and F3.
Digital Inputs Operation
Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the meter. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 in the case
of digital inputs 1-4 or with an active high signal, see
Digital I/O Connections on page 31 for details. 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 (
user
) on
page 58 for details.
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 meters are set at the factory to
display the max reading by pressing the Up arrow/F2
button and to use the Right arrow/F1 button to access
the
Reset menu.
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. Press the Up arrow/F2 button again to display the
minimum reading of channel A since the last
reset/power up.
3. To reset max/min press Right arrow/F1 button to
access the Reset menu. The max & min displays
are reset to actual values.
Press Menu to exit max/min display reading.