Omega Products DPF301-EXP User Manual

ECONOMICAL 4 to 20 mA

Extended Warranty

Program

SM

LOOP-POWERED INDICATOR

For Rate or Rate and Total

DPF301 Series

Starts at

$

305

Shown with

PSU-93 power supply, $40.

DPF302, $335,
shown smaller
than actual size.

⻬ Available with

Dual Rate/Total,
Display

⻬ Linear or Square

Root Extraction
of Input

⻬ 8-Digit Totalizer Display
⻬ Calibration Fully

Programmable Through
Keypad

The DPF301 Series comprises
4 to 20 mA loop-powered panel-mount
indicators that display process
variables in engineering units
(GPM, LPM, psig, %RH, etc.), with
an adjustable decimal point for rate
and total display. Because these
indicators take power directly from
the current loop, the user can
perform programming on the front
keypad; there are no jumpers to
configure or potentiometers to scale.
An internal lithium battery ensures
that all programming is retained in
memory, even when the loop power
is disconnected. The DPF301 can
be programmed for either a linear
input or square root extraction for
use with differential pressure
flowmeters.

OMEGACARESMextended warranty program

is available for models shown on this page.

Ask your sales representative for full details

when placing an order. OMEGACARE

covers parts, labor and equivalent loaners.

SM

The DPF301 general purpose
indicator features one 4
display, while the DPF302 flow
indicator has a dual, 2-line, 41⁄2 digit
rate display and 8-digit totalizer. The
totalizer can be reset from either the
front keypad or remotely via a
contact closure.

The DPF300 Series indicators
are available in a choice of
panel-mount, NEMA 4X (IP66), or
explosion-resistant enclosures.

1

⁄2 digit rate

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description
DPF301 $305 General purpose panel-mounted 4 to 20 mA

DPF302 335 Panel-mounted 4 to 20 mA loop-powered ratemeter

PSU-93 40 Power supply, 16 to 23 Vdc, 300 mA max, unregulated

Comes complete with operator’s manual.
For NEMA 4X (IP66) polycarbonate enclosure, add suffix “-NEMA” to model number and

$100 to price.
For explosion-resistant housing, add suffix “-EXP” to model number and add $305 to price.

Ordering Examples: DPF302, loop-powered ratemeter and totalizer, $305.
DPF302-NEMA, panel-mounted 4 to 20 mA loop-powered ratemeter/totalizer, $335 +100 = $435.
OCW-3, OMEGACARESMextends standard 2-year warranty to a total of 5 years, ($109),

$435 + 109 = $544.

Recommended Reference Book: Mathematics for Engineers and Technologies,

EE-2682, $55. Visit omega.com/bobi for Additional Books

M-29

loop-powered ratemeter/indicator

and totalizer for flow

Outside dotted line shows
outside panel dimensions
102 (4) Dia.

Max. above

case

Female

plug-in

connector

91 (3.582) Dia.
bolt circle

3.2 (0.125) holes
to be 120° apart

DPF301 General Purpose Ratemeter/Indicator

Available in a choice of

panel-mount, NEMA 4X (IP66),

or explosion-resistant enclosures

SPECIFICATIONS

Scalable Input Range:

3.8 to 21 mA
Internal Battery (Memory Only): 3V

250 mAh lithium (2-year standby life)

Rate Display (DPF301 and DPF302):

1

4

⁄2 digits max (19999), 8.89 mm (0.35") high

Totalizer Display (DPF302 Only):

8 Digits (99999999), 5.08 mm (0.2") high

Rate Descriptors:

/sec, /min, /hr or “blank”

Unit Descriptors:

Gal, Lit, FT3, M3, “blank”
Display Indications: Low battery and

under/over range
Input: 4 to 20 mA DC, overcurrent

protection to 60 mA, reverse
polarity protected

Loop Voltage Drop: 6V max

Housing

Standard: Round panel mount with

NEMA 4X (IP66) sealed keypad
membrane

Optional: Glass-filled polycarbonate
NEMA 4X (IP66) enclosure, or
explosion-resistant housing for NEMA 7,
NEMA 4 (IP66), Class I, Groups B,
C and D; Class II, Groups E, F and G

Ambient Temperature:

-20 to 70°C (-4 to 158°F)

Extended Temp Option:

-30 to 70°C (-22 to 158°F)

Accuracy (Rated @ 20°C):

0.1% FS resolution, ±1 count
Temperature Drift: 50 ppm/°C typical,

200 ppm/°C worst case
Low Cutoff: A rate below 1% of

selected scale (10% of square root
scale) will assume the “set lo” value

Update Rate: For rate or total, once
every 2 seconds

Weight:

Basic Unit: 227 g (0.5 lb)
With NEMA Enclosure: 454 g (1 lb)
With Explosion-Resistant Housing:

1.6 kg (3.5 lb)

NEMA 4X (IP66) Polycarbonate Enclosure

Explosion-Resistant Housing

M-30

Dimensions: mm (in)

Dimensions: mm (in)

M

Dimensions: mm (in)