PD6720 Field-Mount Loop-Powered Rate/Totalizer
Instruction Manual
5
Specifications
Except where noted all specifications apply to operation at +25°C.
General
Display
Five digits
(-9999 to
99999)
0.70" (17.8 mm) high,
7-segment, automatic lead zero
blanking.
Seven
characters
0.4" (10.2 mm) high, 14-segment.
Symbols
High & Low Alarm, Password Lock
Display
Orientation
Display may be mounted at 90° increments
up to 270° from default orientation.
Display
Assignment
Upper display is assigned to rate and lower
display may be assigned to total, tag name/
engineering units, or to alternate between them.
Display
Update Rate
Ambient > -25°C: 2 Updates/Second
Ambient < -25°C: 1 Update/5 Seconds
Backlight
White; Loop-powered or externally powered.
Backlight can be enabled or disabled via
alternative wiring of terminal block. Loop-
powered backlight brightness will increase as
the input signal current increases. Externally
powered backlight has consistent brightness.
Externally
Powered
Backlight
Voltage
Range:
Maximum Power
9-36
VDC
9
VDC
12
VDC
24
VDC
36
VDC
0.2 W
0.25 W
0.5 W
0.75 W
Display
Overrange
Display flashes
99999
Display
Underrange
Display flashes
-9999
Programming
Method
Four SafeTouch through-window buttons
when cover is installed. Four internal
pushbuttons when cover is removed.
Noise Filter
Programmable
LO
,
med
,
HI
, or
OFF
Recalibration
Recalibration is recommended at least every
12 months.
Max/Min
Display
Max/Min readings reached by the process
are stored until reset by the user or until
power to the meter is turned off.
Advanced
Function
Linear, square root, or programmable
exponent
Password
Programmable password restricts
modification of programmed settings.
Non-Volatile
Memory
All programmed settings are stored in
non-volatile memory for a minimum of
ten years if power is lost.
Normal Mode
Rejection
64 dB at 50/60 Hz
Environmental
Operating temperature range: -40 to 75°C
Storage temperature range: -40 to 75°C
Relative humidity: 0 to 90% non-condensing
Connections
Screw terminals accept 12 to 22 AWG wire
Enclosure
NEMA 4X, IP65 plastic field enclosure
Color: grey
Three ¾" NPT threaded conduit openings.
Two ¾" NPT plastic conduit/stopping plug with
1.29" wrenching flats and screwdriver slot.
Mounting
May be mounted directly to conduit. Two slotted
flanges for wall mounting or NPS 1½" to 2½" or
DN 40 to 65 mm pipe mounting.
See
on page
Overall
Dimensions
5.67" x 5.25" x 4.18" (W x H x D)
(144 mm x 133 mm x 106 mm)
Weight
1.65 lbs (26.4 oz, 0.75 kg)
Warranty
3 years parts and labor. See Warranty
Information and Terms & Conditions on
Input
Input
4-20 mA
Accuracy
±0.03% of calibrated span ±1 count,
square root & programmable exponent
accuracy range:
10-100% of calibrated span.
Temperature Drift
50 PPM/
C from -40 to 75
C ambient
Maximum Voltage
Drop &
Equivalent
Resistance
Without Backlight
or with Externally
Powered Backlight
With Loop-
Powered
Backlight
3.0 VDC @ 20 mA
6.0 VDC @ 20mA
150
Ω @ 20 mA
300
Ω @ 20 mA
Multi-Point
Linearization
2 to 32 points
Signal Input
Conditioning
Linear, square root, programmable
exponent
Programmable
Exponent
User selectable from 1.0001 to 2.9999
for open channel flow.
Low Flow Cutoff
0-99999 (0 disables cutoff function)
Point below at which display always
shows zero.
Decimal Point
User selectable decimal point
Minimum Span
Input 1 & Input 2: 0.10 mA
Calibration
Range
An
Error
message will appear if input 1
and input 2 signals are too close
together.
Input
Range
Minimum Span
Input 1 & Input 2
4-20 mA
0.10 mA
Input Overload
Over current protection to 2 A max.
HART
Transparency
The meter does not interfere with
existing HART communications; it
displays the 4-20 mA primary variable
and it allows the HART
communications to pass through
without interruption.
The meter is not affected if a HART
communicator is connected to the loop.
The meter does not display secondary
HART variables.
