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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.
The DPF301 general purpose
indicator features one 41.2 digit rate
display, while the DPF302 flow
indicator has a dual, 2-line, 4½ 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.
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): 41.2 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)
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