DPM-500 Analog Input Meter Instruction Manual
45
Meter
Operation
The meter is capable of accepting current (0-20 mA, 4-20 mA) and voltage signals (0-5 V, 1-5 V, 0-10 V,
10 V) and displaying these signals in engineering units from -99999 to 999999 (
e.g.
a 4-20 mA signal could
be displayed as -50.000 to 50.000).
The dual-line display can be customized by the user to operate in such a way as to satisfy a specific
application. Typically, the main display is used for the process variable; while the second display is used
for engineering units, custom legend, or set point indication.
The analog input can be scaled to display the process in two different scales; for example: with
d-SCAL
enabled, the main display could indicate level in feet and the second display could indicate the volume in
gallons.
Additionally, the meter can be set up to display the analog input on the main display and the Modbus input
on the second display. The relays and analog output can be programmed to operate from the Modbus PV
input.
Front Panel Buttons Operation
Button Symbol
Description
Press to enter or exit Programming Mode, view
settings, or exit max/min readings
Press to reset max/min readings or other
parameter/function assigned through the
User
menu
Press to display max/min readings or other
parameter/function assigned through the
User
menu
Press to acknowledge relays or other
parameters/function assigned through the
User
menu
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 above shows the factory default settings for F1, F2, and F3.
F4 Operation
A digital input, F4, 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 to COM, or with an active low signal. During
operation, F4 operates according to the way it has been programmed in the
Advanced Features
– 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 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 reading using function key with factory defaults:
1. Press Up arrow/F2 button to display maximum reading since the last reset/power-up.
2. To reset max/min press Right arrow/F1
button to access the Reset menu. The
max & min displays are reset to actual
values.
3. Press Menu to exit max/min display reading.
To display max/min readings continuously:
Assign either display to Max (
d Hi
), Min (
d Lo
), or toggle
between Max and Min (
d HL
) every 10 seconds.
