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BATCH CONTROLLER WITH
TWO STAGE VALVE CONTROL
DPF-310 Series
Starts at
$
605
Start/Stop Buttons
Separate 8-Digit K-Factors
for Rate and Total
Pulse or Analog Input Models Available
Displays Rate, Total and Grand Total
Security Lockout
2 Set Points for 2-Stage Valve Control
NEMA 4X (IP65) Front Panel
Featuring 8 digits of bright, 14 mm (0.55"), alphanumeric display, the DPF-310 Series can accept up to
20,000 pulses per second of digital count. The analog
input version accepts 4 to 20 mA signal and it uses a
highly linear integrator (V to F converter) to generate
0 to 10 kHz digital pulses. The standard unit has
2 separate, 8-digit, floating decimal, “K” factors to
convert the inputs to meaningful total and rate data.
An optional 16-point K-factor can linearize flow from
non-linear meter outputs. The user, with the push of a
button, can toggle back and forth to view the total of
the batch, the rate of flow or the grand total of flow.
The DPF-310 Series may be thought of as two
separate counters and a ratemeter. The “batching”
counter counts to prewarn and preset numbers
entered by the user and enables separate control
outputs. The “totalizing” counter gives a cumulative
reading or grand total. Finally, the ratemeter counts
the number of pulses per second and, with its scaling
feature, can provide gallons per minute or any other
rate measurement without the totalizer losing counts.
At any time, the user may view the total, the grand
total or the rate while never interrupting the counting
process. Setup is done through the front panel and
the menu driven software in the unit. Start-stop control
can be activated via the front panel buttons or remote
inputs (on some models). The unit operates from
either 110 Vac/12 to 27 Vdc, or optional
220 Vac/12 to 27 Vdc. If AC power is used, 2 built-in
regulated 12 Vdc @ 100 mA power supplies are
offered. They can be connected to provide +12 Vdc
and -12 Vdc or +24 Vdc to drive external devices.
CMOS logic is used to provide high noise immunity
and low power consumption with EEPROM to hold
data a minimum of 10 years if power is interrupted.
SPECIFICATIONS
Display: 8-digit, 14 mm (0.55") high, 15 segment,
red orange, LED
Input Power (Internally Fused):
110 Vac ±15% or 12 to 27 Vdc
220 Vac ±15% or 12 to 27 Vdc (“-220V” Vac option)
Current: Maximum 280 mA dc or 5.3 VA at rated ac voltage
Output Power (On AC Powered Units Only):
12 Vdc @ 100 mA. Separate isolated 12 Vdc @ 100 mA to
allow 12 Vdc or 24 Vdc regulated ±5% worst case (DC
outputs are supplied with re-settable fuses)
Temperature:
Operating: 0 to 54°C (32 to 130°F)
Storage: -40 to 93°C (-40 to 200°F)
Humidity: 0 to 90% non-condensing
Approvals: CE approved
Memory: EEPROM stores all program and total data for
minimum of 10 years if power is lost
Pulse Inputs (DPF-311): Standard, high impedance
pulse input
Low: Open or 0 to 1 Vdc
High: 3 to 30 Vdc, 10 kΩ impedance, 20 kHz max input
speed (min on/off 25 msec) or field changeable to: 4.7 kΩ
input pull up resistors to 5 Vdc on input for pulsing with
contact to ground or NPN open collector transistor
Analog Inputs (DPF-312): The current loop input is
converted to a highly linear 0 to 10 kHz frequency. This
frequency can then be scaled by the 8-digit K-factors to total
or display rate in separate engineering units
Accuracy Over Full Temperature Range
Zero Error: 0.175% full scale max
Overall Error: 0.5% full scale max
DPF-312: 4 to 20 mA, 250 Ω impedance
Reset
Front Push Button: “CLR” resets displayed number
and control output
DPF-311, $605,
shown smaller
than actual size.
63.5 x 187.3 mm
(2.5 x 7.375") panel cutout
M-25
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PANEL
CUTOUT
63.5 -0, +0.5
(2.50 -0, +0.02)
187.3 -0, +1
(7.375 -0, +0.04)
A
13.5
(0.53)
152.4
(6.0)
63
(2.48)
(NOM)
(NOM)
ABCD
123
4 56
7 89
CLR0SET
207.5
(8.17)
84
(3.31)
Remote Start and Stop/Reset Inputs
(Not available on DPF-312-A or
models with the “-LIN” option): A 4 to
30 Vdc positive pulse will activate these
inputs. Pin 10 is the START input and
when activated, the unit will “start”. Pin
5 is the STOP/RESET input. When
activated, the unit will “stop” (if unit is
started and the batch is not complete).
When the unit is stopped or the batch is
complete, activating this input will reset
the total. If pin 5 is held high (4 to 30
Vdc), the display will flash “STOPPED”
and any start inputs will be
Stop always over-rides start input.
Control Outputs
Analog Output (“A” Models)
Security: The DPF-310 Series has a
missing pulse detector. The user
selects the amount of time (1 to 99 sec)
that the unit will “wait” for input pulses.
If the unit doesn't receive pulses within
the selected time, the unit displays
“SECURITY” and both relays drop out.
(00 disables the security feature;
entering the lockout code returns the
unit to the run mode)
Presets: The user may enter two
numbers to set up the batch totalizer,
preset and prewarn. The prewarn is a
number set a certain number of counts
before the preset number. For instance,
you may want one hundred gallons in a
particular batch. You may also want a
valve to close and slow down flow
25 gallons before the end. Your preset
is 100, your prewarn is 25. When the
start is activated, the relays energize
simultaneously to start flow. When the
totalizer reaches 75, the prewarn relay
drops out. When the totalizer reaches
100 the preset relay drops out. The
preset values can be viewed or
changed via the menu (when stopped).
K-Factor: In the standard unit a fixed
K-factor is used to convert the input
pulses or frequency generated
internally by the analog input to
engineering units. The 8-digit K-factor
dividers, with decimal keyed into any
position, allow easy direct entry of any
K-factor greater than 0.0001 to
99,999,999. Separate K-factors may be
entered for the total and rate section.
Thus, you may batch and total in
gallons and display rate in liters per
hour. The maximum factored count
speed is 20,000 Hz. The maximum
factored rate is 7-digits.
inhibited.
SPDT Relay Version:
10 A 120/240 Vac or 28 Vdc (resistive)
Current Outputs: A sinking driver
generates a corresponding linear
current through the external devices,
updating with each update of the rate.
Accuracy is ±0.5% FS worst case.
Compliance voltage must be 3 to
24 Vdc, non inductive. (The DPF-310
Series can provide the DC source as
long as the drop across all devices
being driven does not exceed 21V)
16-Point Linearization (“-LIN” option):
This variable K-factor option makes flow
systems more accurate and often
Lockout: Unauthorized front panel
changes can be prevented by entering
a user selected four digit code.
extends their usable range by allowing
users to dial in different K-factors for
Dimensions: mm (in)
different flow rates. It works with either
pulse input or standard analog current
loop. It is recommended for flow meters
whose K-factors change with different
rates of flow. This option can also be
used to display static volume in
irregular shaped vessels by interfacing
level or pressure transducers to the
analog input. From 3 to 16 points of
frequency from 0 to 10,000 Hz and Kfactors greater than 0.0001 to 999,999
are dialed in at set up. The 16 point
linearization option uses 8 digit floating
math to interpolate between settings.
Rate per second, per minute or per
hour programmability eliminates the
need to calculate separate K-factors for
total and rate.
Totalizer: Each of the total and grand
total counters have 8 digits. In the setup mode choose “R0” (reset to zero) for
count up operation or “SP” (set to
preset) for count down operation. While
viewing the total the display can be
made to flash the grand total by
pressing “ENT”. Activating “CLR” while
the grand total is flashing, resets the
grand total counter.
Ratemeter: Accurate to 5
1
⁄2 digits
(1 display digit). The rate meter can be
programmed to accept almost any
number of pulses per unit of measurement,
sample from 2 to 24 seconds maximum,
and autorange up to 6 digits of
significant information. The rate meter
with a “K” factor of 1 displays the rate of
pulses per second. Simply dial in the
proper “K” factor to display in minutes,
hours or other units of measurement.
(See 16-Point Linearization above)
Press the “C” button while the unit is
displaying the batch to display the rate;
“R” is displayed on the left
side of the display.
Weight: This feature is used to provide
a weighted averaging of the rate data
being received. Higher settings provide
more averaging for a more stable
display, derived from the equation:
(Old Data x “Weight”) +
New Data (“Weight” +1)
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
Model No. Price Description
DPF-311 $605 Batch controller, pulse input
DPF-311-A 740 Batch controller, pulse input, analog output
DPF-312 710 Batch controller, analog input
DPF-312-A 880 Batch controller, analog input, analog output
Comes complete with operator’s manual.
For 16-point linearization add suffix “-LIN” to model number consult Flow Engineer for price.
For 220 Vac power add suffix “-220V” to model number, no additional charge.
Ordering Examples: DPF-311, batch controller, pulse input, $605.
DPF-312, batch controller, analog input, $710.
Recommended Reference Book: Instrumentation for Process Measurement
and Control, GE-1401, $95. Visit omega.com/bobi for Additional Books
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