4
Loop-Powered Process Meter
DPM-400
www.binmaster.com
Bargraph Provides Quick Understanding
To help users get a quick understanding of where their process is at,
the DPM-400 displays a 20-segment bargraph. This bargraph also in-
cludes a numeric value of the percentage the bargraph represents. The
bargraph can be programmed to represent the percent of PV1 or PV2
or it can be scaled to any range within the scale.
Max/Min Display
The max & min readings (peak & valley) reached by the process can be
displayed either continuously or momentarily:
1.
Display momentarily by pressing the F1 key (default) or assigning
to any of the other function keys or to the digital input in the User
menu. Press Enter to lock/unlock max/min display.
2.
Display continuously by assigning either display line to max/min
through the Display menu.
Any of the F1-F3 function keys (buttons) and the digital input can be
programmed to reset the max & min readings.
Predefined and Custom Units
The meter has six available preprogrammed unit classes, volume,
height, temperature, pressure, weight, and rate. When the desired unit
class or unit of measure within a class is not available, a custom unit
may be programmed by using the (
CUSTOM
) menu.
Change Between Units without Needing to
Re-Scale the Meter
It is possible to change the display units within the selected unit class
without the need to re-scale the meter. When selecting a new unit from
within the
DISPLAY
menu (e.g. changing from gallons (
GAL
) to
liters (
L
)), the meter will automatically convert the display values
to display the new unit. If entering a custom unit (
CUSTM
), a custom
conversion factor will need to be entered.
Tare
The tare function zeroes out the display. In the case of scale weight, tare
is used to eliminate container weight and provide net weight readings.
The captured tare may be reset manually with any function key or digital
input.
OUTPUTS
DPM-400s are available with two open collector outputs as standard
and two solid state relays and 4-20 mA output as options. The open
collector outputs and relays generally operate in the same manner,
with the major exception being the open collectors are not available for
pump alternation and the relays are not available with pulse features.
The open collectors and relays can be controlled either automatically
or manually. The alarm status (with flashing red message) will show on
the display even with no output wired.
Two Open Collector Outputs
The DPM-400 is equipped with two NPN open collector outputs that
may be set up for pulse outputs, alarms, timed pulses, stopwatch on/
off, or disabled. Pulse outputs can be set to transmit the PV value
(PV1 or PV2 if meter is in dual-scale mode). Output 2 may be used to
generate a quadrature output based on the other open collector output.
An output test mode is also selectable to generate pulses at a constant
programmable frequency.
Two Optional Solid State Relays
The meter is optionally equipped with two solid state relays that may
be set up for alarms, timer, stopwatch on/off, or pump alternation.
The relays are rated at 250 VAC/DC @ 1 A for resistive loads and
75 VA @ 0.6 A, 250 VAC/DC max (Safe Area only) for inductive loads.
Alarms are available based on the PV value or the digital input.
Loop-Powered Relay Alarm Trip
The DPM-400, with its two solid state relays, can be used as a loop-
powered relay alarm trip in general purpose areas. The DPM-400’s two
relays can be programmed for two different kinds of latching operation:
Reset via momentary contact closure at any time or reset via momentary
contact closure only after the alarm has cleared. And the DPM-400’s
display can be programmed to turn red and flash an alarm message –
something not found on most loop powered alarm trips.
Resetting the Open Collectors and Relays
The open collectors and relays (alarms) may be programmed to reset in
the following ways:
•
Automatic
(
AUTO
): Alarm will reset automatically once the alarm
condition has cleared.
•
Automatic/Manual
(
AUTO.MAN
): Alarm will reset automatically
once the alarm condition has cleared but can also be reset using
the Enter button (or whichever function key is set to acknowledge)
at any time.
•
Latching
(
LATCH
): Alarm must be reset manually and can be done
so at any time. Press the Enter (ACK) button at any time to clear the
alarm.
•
Latching with Reset after Cleared
(
L-CLEAR
): Alarm must be
reset manually and can only be done so after the alarm condition
has cleared. Press the Enter (ACK) button after the alarm condition
has cleared to reset the alarm.
Bargraph indicating a 200 gallon tank is just about full
