Omega Products DPF401 User Manual
RATE/TOTAL/
BATCH METERS
DPF401 Series
DPF401,
shown smaller
than actual size.
U 5-Year Warranty
U Simultaneous Display of
Rate and Total
U Batch Controller
U Real-Time Clock
U Square-Root Option
U Isolated BCD Option
U 5 Open-Collector Outputs Standard
U Red or Green Display
The DPF400 Series comprises 6-digit multifunction
process indicators/controllers. Each unit can easily be
configured via the front-panel pushbuttons or optional
serial communication boards as a ratemeter/totalizer,
batch controller, or real-time clock.
Rate may be displayed in engineering units. In
addition, average rate, a running average that works
like a filter, can help eliminate noise yet does not
introduce a long delay for a step change in the input
frequency response. With the optional analog input
board, the DPF400 meters can accept a signal, such
as 4 to 20 mA DC, from any typical differential flow
transmitter and extract the square root of this signal,
displaying the result in any engineering units desired.
The DPF400 Series meters can also function as single
input batch controllers that can simultaneously count
the batch, number of batches completed, and the
total number of pulses received. An internal timer for
process time measurement displays in HH, MM,
or SS format.
SPECIFICATIONS
Accuracy: ±0.1% @ 15 to 35°C (59 to 95°F)
Step Response: 10 to 90% FS, 50 ms
Turndown Ratio: Max offset divided by minimum span,
1000 with 0.1% resolution; 100 with 0.01% resolution signal
conditioners (non-isolated TTL-level pulse input standard)
Threshold: 0.7 to 2.0V
Frequency Ranges: 0.2 Hz to 20 kHz
Protection Level: 24V
Trigger Slope: Positive
Sensor Excitation (NPN): 16 to 30V @ 70 mA non-
regulated isolated pulse input with excitation (voltage input
and passive magnetic pickup most popular)
Connection: Plug-in screw terminal
Maximum Signal: 60 Vrms with protection to 240V
Sensitivity: 20 mVrms
Input Impedance: 75 kΩ
Hysteresis: 50 mV
Sensor Excitation: 12V regulated
Frequency Range: 10 on/off
NPN Open-Collector Input
Connection: Plug-in screw terminal
Sensor Excitation: 12V
regulated
NAMUR Input Connection:
Plug-in screw terminal
Sensor Excitation: 8.2V
Internal Load/Source
Impedance: 1 kΩ
Activated: <1 mA
Deactivated: >3 mA
Contact-Closure Input
Connection: Plug-in screw
terminal
per second
Isolated Analog Input (Optional)
Connection: Plug-in screw terminal
Signal Range(s): 0 to 5 Vdc,
1 to 5 Vdc, 0 to 10 Vdc,
0 to 1 mA DC, 4 to 20 mA DC
isolation; SIG GND to DIG
GND: 354 Vp
Low-Level Shut-Off: Programmable
Non-Linearity Max: 0.3% FS
Accuracy at 25°C (77°F): 0.05% FS
Temperature Coefficient:
50 ppm/°C
To Order Visit omega.com/dpf400 for Pricing and Details
MODEL NO. DESCRIPTION
DPF401
DPF402 Low-level pulse input meter includes
DPF403
Note: 0 to 10 Vdc and 0 to 1 mA inputs optionally available for DPF403,
*
add suffix “-10VINP” or “-1MA”, no additional charge.
DISPLAY AND POWER OPTIONS
ORDER SUFFIX DESCRIPTION
-GR Green display
-230V 230 Vac power
OUTPUT BOARDS AND COMMUNICATIONS OPTIONS
MODEL NO. DESCRIPTION
DPF400-A3 Analog output board
DP40-B
DP40-R
DP40-S24
Both options are not available in one unit.
*
† Communications options include 1.8 m (6') communications cable which
plugs into the rear of the DPF400 and terminates with a phone plug. For proper
termination to a computer, a 9-pin and 25-pin connector which mates with the
phone plug, is offered, visit omega.com/dpf400 for details.
Comes complete with gray BUMPER BAND® protective guard and operator’s manual.
Ordering Examples: DPF401, meter for TTL level input.
DPF402-GR, low level pulse input meter with optional green display.
ACCESSORY
ORDER SUFFIX DESCRIPTION
DPP-5
* Isolated BCD output board
* Dual 7A mechanical relays
TTL/open collector/contact closure input meter,
includes 16V @ 70 mA output power
12V @ 70 mA output power or 8.2V
with 1 k Ω source impedance
* 4 to 20 mA/0 to 5 Vdc/1 to 5 Vdc (field-
selectable) input meter, includes nominal
24V @ 25 mA output power.
† Isolated RS232/485 communications
1
⁄
8 DIN panel punch
INSTRUMENTATION
D
D-88
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